Configuring T3 Interfaces on 48-Port T3/E3 Interface Module

T3 interfaces on the 48-Port T3/E3 Interface Module supports 48 ports. The channels on the T3 interfaces can be configured as either clear channel mode or channelized mode.


Note

T3 is supported only on Cisco ASR 900 RSP3 Module

Information About T3 Interfaces

The following sections provide information about T3 interfaces.

Overview of Configuring T3 Interfaces

The T3 interface supports two modes, clear channel mode and channelized mode. 28T1 can be enabled only in channelized mode. Each T1 channel can be configured to use the entire T1 bandwidth for data transmission.

Benefits of T3 Interfaces

The following are the benefits of configuring T3 interfaces:

  • Higher bandwidth

  • Flexibility by channelization

Restrictions for Configuring T3 Interfaces

  • Serial interfaces are not supported. To configure serial interfaces, it is recommended to configure CEM as a workaround.

  • The supported BERT patterns are 1s, 2^11, 2^15, 2^20-O153, 2^20-QRSS and 2^23 patterns.

  • E3 mode is not supported.

  • DS0 level Channelization is not supported.

  • Circuit Emulation Service over Packet-Switched Network is not supported in both clear channel and channelized modes.

  • Far end performance monitors (PM) counters are not supported.

  • Loopback remote is not supported.

How to Configure T3 Interfaces

This section provides the information about how to configure T3 interfaces. The T3 interfaces can be configured as Clear Channel T3 interfaces or Channelized T3/T1 interfaces.

Setting the Port

To enable T3 mode on the T3 interface module, follow these steps: 

 
enable
configure terminal
controller mediatype 0/4/0
mode t3
exit

Configuring the Controller of Clear Channel T3 Interfaces

Before You Begin

When the clear channel T3 interfaces is used for the first time, the running configuration does not show the T3 controller. You can use the show platform command to learn if the chassis recognize the T3 port and was able to initialize the card properly. After the port is configured for the slot, the respective controller appears in the running configuration.

After the network module has ascertained that the port has been initialized properly, configure the clear channel T3 interfaces.


Note

By default, the T3 controller is in C-Bit framing. To configure CEM, the framing value must be changed to unframed mode.

Perform this task to select and configure clear channel controller as T3. 

 
enable
configure terminal
controller t3 0/4/40
no channelized
clock source line
no shut
exit

Verifying Controller Configuration of Clear Channel T3 Interfaces for SAToP

Use the show controllers command to verify the controller configuration of T3 clear channel interfaces for Structure-Agnostic TDM over Packet (SAToP): 
Router#  show controllers t3 0/4/40
T3 0/4/40 is up.
  Hardware is ASR903-48T3E3-CE

  Applique type is Clear Channel T3
  No alarms detected.
  Framing is Unframed, Line Code is B3ZS, Cablelength is 224
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (320 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs
  
  Total Data (last 1 2 minute intervals):
     1 Line Code Violations, 0 P-bit Coding Violation,
     0 C-bit Coding Violation, 7 P-bit Err Secs,
     7 P-bit Severely Err Secs, 0 Severely Err Framing Secs,
     98 Unavailable Secs, 14 Line Errored Secs,
     7 C-bit Errored Secs, 7 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs

Configuring the Controller of Channelized T3/T1 Interfaces

Before You Begin

When the channelized T3/T1 interfaces are used for the first time, the running configuration does not show the T3 controller. You can use the show platform command to learn if the chassis recognizes the T3 port and if it is able to initialize the card properly. After the port is configured for the slot, the respective controller appears in the running configuration.

After the network module finds that the port is properly initialized, configure the channelized T3/T1 interfaces.

Perform this task to select and configure channelized controller as T3/T1. 

 
enable
configure terminal
controller t3 0/4/46
channelized
clock source line
no shut
exit

Note

The channelized mode is default mode, when mode T3 is configured under controller media-type.

Verifying the Controller Configuration of Channelized T3/T1 Interfaces for SAToP

Use the show controllers command to verify the controller configuration of channelized T3/T1 interfaces for SAToP: 
Router#  show controllers t3 0/4/46

T3 0/4/46 is down.
Hardware is NASR903-48T3E3-CE

Applique type is Channelized T3/T1
Receiver has loss of signal.
MDL transmission is disabled

FEAC code received: No code is being received
Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
BER thresholds: SF = 10e-10 SD = 10e-10
Clock Source is line
Equipment customer loopback
Data in current interval (730 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation, 0 P-bit Err Secs
0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
0 Unavailable Secs, 730 Line Errored Secs
0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
0 Severely Errored Line Secs
0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
0 CP-bit Far-end Unavailable Secs
0 Near-end path failures, 0 Far-end path failures
0 Far-end code violations, 0 FERF Defect Secs
0 AIS Defect Secs, 0 LOS Defect Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation, 0 P-bit Err Secs
0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
0 Unavailable Secs, 900 Line Errored Secs
0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
0 Severely Errored Line Secs
0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
0 CP-bit Far-end Unavailable Secs
0 Near-end path failures, 0 Far-end path failures
0 Far-end code violations, 0 FERF Defect Secs
0 AIS Defect Secs, 0 LOS Defect Secs

Configuring Structure-Agnostic TDM over Packet - Clear Channel T3 Interfaces

Before You Begin

Before SAToP is configured, the controller of clear channel T3 interfaces must be configured. 

 
enable 
configure terminal
controller t3 0/4/40
no channelized
cem-group 0 unframed 
interface CEM 0/4/40
cem 0 
xconnect 10.10.2.2 204 encapsulation mpls
exit

Verifying CEM Configuration of Clear Channel T3 Interfaces for SAToP

Use the show run interface command to verify the configuration of xconnect: 
Router# show run interface cem 0/4/1

Current configuration : 96 bytes
!
interface CEM0/4/1
no ip address
cem 0
xconnect 10.10.2.2 204 encapsulation mpls
!
end
Use the show cem circuit int cem command to verify the CEM interface configuration of clear channel T3 interfaces for SAToP: 
Router# show cem circuit int cem 0/4/1

CEM0/4/1, ID: 0, Line: UP, Admin: UP, Ckt: ACTIVE
Controller state: down, T3/E3 state: up
Idle Pattern: 0xFF, Idle CAS: 0x8
Dejitter: 5 (In use: 0)
Payload Size: 1024
Framing: Unframed
CEM Defects Set
None

Signalling: No CAS
RTP: No RTP

Ingress Pkts:    1321577              Dropped:             0                   
Egress Pkts:     1321577              Dropped:             0                   

CEM Counter Details
Input Errors:    0                    Output Errors:       0                   
Pkts Missing:    0                    Pkts Reordered:      0                   
Misorder Drops:  0                    JitterBuf Underrun:  0                   
Error Sec:       0                    Severly Errored Sec: 0                   
Unavailable Sec: 0                    Failure Counts:      0                   
Pkts Malformed:  0                    JitterBuf Overrun:   0

Configuring Structure-Agnostic TDM over Packet - Channelized T3/T1 Interfaces

Before You Begin

Before SAToP is configured, the controller of channelized T3/T1 interfaces must be configured. 

 
enable 
configure terminal
controller t3 0/4/46
channelized
t1 1 cem-group 0 unframed 
interface CEM 0/4/46
no shut
cem 0 
xconnect 10.10.2.2 204 encapsulation mpls
exit

Verifying the CEM Configuration of Channelized T3/T1 Interfaces

Use the show run controller command to verify the CEM configuration of channelized T3/T1 interfaces: 
Router# show run controller 0/4/46                                                                                            

Current configuration : 109 bytes
!
Controller T3 0/4/46
framing c-bit
clock source line
cablelength short
t1 1 cem-group 0 unframed
end
Use the show cem circuit int cem command to verify the CEM configuration of channelized T3/T1 interfaces: 
Router# show cem circuit int cem 0/4/46                                                                                            

CEM0/4/46, ID: 1, Line: UP, Admin: UP, Ckt: ACTIVE
Controller state: up, T1/E1 state: up
Idle Pattern: 0xFF, Idle CAS: 0x8
Dejitter: 5 (In use: 0)
Payload Size: 192
Framing: Unframed
CEM Defects Set
None

Signalling: No CAS
RTP: No RTP

Ingress Pkts:    105043259            Dropped:             0                   
Egress Pkts:     105043387            Dropped:             0                   

CEM Counter Details
Input Errors:    0                    Output Errors:       0                   
Pkts Missing:    0                    Pkts Reordered:      0                   
Misorder Drops:  0                    JitterBuf Underrun:  32                  
Error Sec:       0                    Severly Errored Sec: 0                   
Unavailable Sec: 0                    Failure Counts:      0                   
Pkts Malformed:  0                    JitterBuf Overrun:   0    
-
-
-
CEM0/4/46, ID: 28, Line: UP, Admin: UP, Ckt: ACTIVE
Controller state: up, T1/E1 state: up
Idle Pattern: 0xFF, Idle CAS: 0x8
Dejitter: 5 (In use: 0)
Payload Size: 192
Framing: Unframed
CEM Defects Set
None

Signalling: No CAS
RTP: No RTP

Ingress Pkts: 136303 Dropped: 0 
Egress Pkts: 0 Dropped: 0 

CEM Counter Details
Input Errors: 0 Output Errors: 0 
Pkts Missing: 135682 Pkts Reordered: 0 
Misorder Drops: 0 JitterBuf Underrun: 137649 
Error Sec: 0 Severly Errored Sec: 0 
Unavailable Sec: 0 Failure Counts: 135 
Pkts Malformed: 0 JitterBuf Overrun: 0

Configuring MDL for T3 Interfaces

Maintenance Data Link (MDL) messages are used to communicate identification information between local and remote ports. The MDL message includes:

  • Equipment Identification Code (EIC)

  • Location Identification Code (LIC)

  • Frame Identification Code (FIC)

  • Unit

  • Path Facility Identification (PFI)

  • Port Number

  • Generator Identification Number


Note

MDL messages are only supported when the T3 framing is set for C-bit parity.

The no mdl command removes the configuration of mdl messages.

Configuring MDL for Path Transmission

To configure MDL path transmission messages on T3 controller configuration mode, use the following commands: 
 
enable
configure terminal
controller t3 0/0/17
framing c-bit
cablelength short
mdl string eic beic
mdl  string lic beic
mdl  string fic bfix
mdl  string unit bunit
mdl  string pfi bpfi
mdl  transmit path
Verifying MDL for Path Transmission Configuration

For PE1 Configuration:

Use show controller command to display the verification of MDL path transmission configuration. 

Router#  show controllers t3 0/0/17

T3 0/0/17 is up.
  Hardware isASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  No alarms detected.
  MDL transmission is enabled
     EIC: beic, LIC: beic, FIC: bfix, UNIT: bunit
     Path FI: bpfi
  FEAC code received: DS3 Out-Of-Frame
  Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (690 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs

For PE2 Configuration:

Use show controller command to display the verification of MDL path transmission configuration. 

Router#  show controllers t3 0/0/18

T3 0/0/18 is up.
  Hardware is ASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  No alarms detected.
  MDL transmission is disabled
    
  Far-End MDL Information Received
     EIC: beic, LIC: beic, FIC: bfix, UNIT: bunit
     Path FI: bpfi
  FEAC code received: DS3 Out-Of-Frame
  Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (710 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs

Configuring MDL for Idle Signal

To configure MDL idle signal messages on T3 controller configuration mode, use the following commands: 
enable
configure terminal
controller T3 0/0/17
framing c-bit
cablelength short
mdl string eic beic
mdl string lic beic
mdl string fic bfix
mdl string unit bunit
mdl string port bport
mdl transmit idle-signal
Verifying MDL for Idle Signal Configuration

For PE1 Configuration:

Use show controller command to display the verification of MDL for idle signal configuration. 

Router#  show controllers t3 0/0/17

T3 0/0/17 is up.
  Hardware is ASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  No alarms detected.
  MDL transmission is enabled
     EIC: beic, LIC: beic, FIC: bfix, UNIT: bunit
     Idle Signal PORT_NO: bport
  FEAC code received: DS3 Out-Of-Frame
  Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (40 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs

For PE2 Configuration:

Use show controller command to display the verification of MDL for idle signal configuration. 

Router#  show controllers t3 0/0/18

T3 0/0/18 is up.
  Hardware is ASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  No alarms detected.
  MDL transmission is disabled
    
  Far-End MDL Information Received
     EIC: beic, LIC: beic, FIC: bfix, UNIT: bunit
     Idle Signal PORT_NO: bport
  FEAC code received: DS3 Out-Of-Frame
  Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (50 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs

Configuring MDL for Test Signal

To configure MDL test signal messages on T3 controller configuration mode, use the following commands: 
 
enable
configure terminal
controller t3 0/0/17
framing c-bit
cablelength short
mdl string eic beic
mdl string lic beic
mdl string fic bfix
mdl string unit bunit
mdl string generator bgen
mdl transmit test-signal
Verifying MDL for Test Signal Configuration

For PE1 Configuration:

Use show controller command to display the verification of MDL for test signal configuration. 

Router#  show controllers t3 0/0/17
T3 0/0/17 is up.
  Hardware is ASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  No alarms detected.
  MDL transmission is enabled
     EIC: beic, LIC: beic, FIC: bfix, UNIT: bunit
     Test Signal GEN_NO: bgen
  FEAC code received: DS3 Out-Of-Frame
  Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (150 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs

For PE2 Configuration:

Use show controller command to display the verification of MDL for test signal configuration. 

Router#  show controllers t3 0/0/18
T3 0/0/18 is up.
  Hardware is ASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  No alarms detected.
  MDL transmission is disabled
    
  Far-End MDL Information Received
     EIC: beic, LIC: beic, FIC: bfix, UNIT: bunit
     Test Signal GEN_NO: bgen
  FEAC code received: DS3 Out-Of-Frame
  Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (160 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs

Performance Monitoring Use Cases or Deployment Scenarios

You can view the statistics or error count generated on the TDM lines for DS3. 

enable
configure terminal
controller MediaType 0/0/0
mode t3
controller T3 0/0/0
framing c-bit
cablelength
long 224-450 ft
short 0-224 ft
controller MediaType 0/0/15
mode t3
controller T3 0/0/15
framing c-bit
cablelength short

The performance monitoring result is displayed using the show controller command. The following snippets of the performance monitoring details when show controller command is executed. 

  
T3 0/7/1 is up.
  Hardware is ASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  No alarms detected.
  MDL transmission is disabled
    
  FEAC code received: No code is being received
  Framing is C-BIT Parity, Line Code is B3ZS, Cablelength Short less than 225ft
  BER thresholds:  SF = 10e-10  SD = 10e-10
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (700 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 0 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs
  Total Data (last 13 15 minute intervals):
     0 Line Code Violations, 0 P-bit Coding Violation,
     0 C-bit Coding Violation, 0 P-bit Err Secs,
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs,
     0 Unavailable Secs, 0 Line Errored Secs,
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs

Use Case 1

If your configuration is as follows:

  • T1 is up

  • No Alarms

  • Framing is unframed

  • Clock Source is Internal

The performance monitoring is displayed as: 
T1 1 is up
No alarms detected.
Framing is unframed, Clock Source is Internal
Data in current interval (450 seconds elapsed):
 0 Line Code Violations, 0 Path Code Violations
 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
 0 Unavail Secs, 0 Stuffed Secs
 0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
 0 Line Code Violations, 0 Path Code Violations
 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
 0 Unavail Secs, 0 Stuffed Secs
Data in Interval 1:
 0 Line Code Violations, 0 Path Code Violations
 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
 0 Unavail Secs, 0 Stuffed Secs
 0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
 0 Line Code Violations, 0 Path Code Violations
 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
 0 Unavail Secs, 0 Stuffed Secs
Data in Interval 2:
 0 Line Code Violations, 0 Path Code Violations
 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
 0 Unavail Secs, 0 Stuffed Secs
 0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
 0 Line Code Violations, 0 Path Code Violations
 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
 0 Unavail Secs, 0 Stuffed Secs
Total Data (last 2 15 minute intervals):
 0 Line Code Violations,0 Path Code Violations,
 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
 0 Unavail Secs, 0 Stuffed Secs
 0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs

Use Case 2

If your configuration is as follows:

  • T1 28 is up

  • No alarm received

  • Framing is unframed

  • Clock Source is Internal

The performance monitoring is displayed as: 
T1 28 is up
No alarms detected.
Framing is unframed, Clock Source is Internal
Data in current interval (230 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
Data in Interval 1:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
Data in Interval 2:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
Data in Interval 3:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
Data in Interval 4:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs
Other Far End Counters:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
Total Data (last 4 15 minute intervals):
0 Line Code Violations,0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
0 Near-end path failures, 0 Far-end path failures, 0 SEF/AIS Secs

The complete output for the show controller command is described as: 

Router# show controllers t3 0/0/0
T3 0/0/0 is down.
  Hardware is ASR903-48T3E3-CE

  Applique type is Channelized T3/T1
  Receiver has loss of signal.
  Framing is Unknown, Line Code is B3ZS, Cablelength Short less than 225ft
  Clock Source is internal
  Equipment customer loopback
  Data in current interval (290 seconds elapsed):
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 289 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs
  Data in Interval 1:
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 900 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs
  Data in Interval 2:
     0 Line Code Violations, 0 P-bit Coding Violation
     0 C-bit Coding Violation, 0 P-bit Err Secs
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
     0 Unavailable Secs, 369 Line Errored Secs
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs
  Total Data (last 2 15 minute intervals):
     0 Line Code Violations, 0 P-bit Coding Violation,
     0 C-bit Coding Violation, 0 P-bit Err Secs,
     0 P-bit Severely Err Secs, 0 Severely Err Framing Secs,
     0 Unavailable Secs, 1269 Line Errored Secs,
     0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
     0 Severely Errored Line Secs
     0 Far-End Errored Secs, 0 Far-End Severely Errored Secs
     0 CP-bit Far-end Unavailable Secs
     0 Near-end path failures, 0 Far-end path failures
     0 Far-end code violations, 0 FERF Defect Secs
     0 AIS Defect Secs, 0 LOS Defect Secs

Troubleshooting T3 Controllers

You can use the following methods to troubleshoot the T3 controllers on chassis:

Running Bit Error Rate Testing

Bit error rate testing (BERT) is supported on T3 interfaces. You can run 16 BERTs at a time. The test can be either of T1 or T3 interfaces.

The interfaces contain onboard BERT circuitry. With this, the interface software can send and detect a programmable pattern that is compliant with CCITT/ITU O.151, O.152, O.153 pseudo-random, and repetitive test patterns. BERTs allows you to test cables and signal problems in the field.

When running a BERT test, your system expects to receive the same pattern that it is transmitting. To help ensure the two common options are available:

  • Use a loopback somewhere in the link or network

  • Configure remote testing equipment to transmit the same BERT test pattern at the same time

The following keywords list different BERT keywords and their descriptions.

Table 1 BERT Pattern Descriptions

Keyword

Description

0s

Repeating pattern of zeros (...000...)

1s

Repeating pattern of ones (...111...)

2^11

Pseudo-random test pattern that is 2,048 bits in length.

2^15

Pseudo-random O.151 test pattern that is 32,768 bits in length.

2^20-O153

Pseudo-random O.153 test pattern that is 1,048,575 bits in length.

2^20-QRSS

Pseudo-random QRSS O.151 test pattern that is 1,048,575 bits in length.

2^23

Pseudo-random 0.151 test pattern that is 8,388,607 bits in length.

Both the total number of error bits received and the total number of bits received are available for analysis. You can select the testing period from 1 minute to 24 hours, and you can also retrieve the error statistics anytime during the BERT test.

BERT is supported in two directions:

  • Line - supports BERT in TDM direction

  • System - supports BERT in PSN direction


Note

When the BERT is configured towards system direction, it internally loopbacks the TDM side.

Configuring BERT for Clear and Channelized T3 Interfaces

Before You Begin

Before you configure BERT for clear channel T3 interfaces, you must ensure that controller and CEM are configured.

To run a BERT on clear channel T3 interfaces, perform the following tasks beginning in global configuration mode. 
 
enable
configure terminal
controller t3 0/0/1
no channelized
bert pattern 0s interval 30 direction line
exit
To run a BERT on channelized T3/T1 interfaces, perform the following tasks beginning in global configuration mode. 
 
enable
configure terminal
controller t3
t1 1 bert pattern 0s interval 30 direction line
exit

Note

To terminate a BERT test during the specified test period, use the no bert command.

You can view the results of a BERT test at the following times:

  • After you terminate the test using the no bert command

  • After the test runs completely

  • Anytime during the test (in real time)

Verifying the BERT Configuration for T3 Interfaces
Use the show controller command to verify the BERT configuration for clear channel T3 interfaces: 
Router#  show controllers t3 0/4/40 | sec BERT
BERT test result (running)
     Test Pattern : 2^15, Status : Not Sync, Sync Detected : 0
     DSX3 BERT direction   : Line
     Interval : 5 minute(s), Time Remain : 3 minute(s)
     Bit Errors (since BERT started): 0 bits, 
     Bits Received (since BERT started): 0 Kbits
     Bit Errors (since last sync): 0 bits
     Bits Received (since last sync): 0 Kbits
Use the show controller command to verify the BERT configuration of channelized T3/T1 interfaces: 
Router#  show controllers t3 0/4/40
T1 1 is up
  No alarms detected.
  Framing is unframed, Clock Source is Internal
  BERT test result (running)
     Test Pattern : 2^23, Status : Not Sync, Sync Detected : 0
     DSX1 BERT direction   : Line
     Interval : 5 minute(s), Time Remain : 4 minute(s)
     Bit Errors (since BERT started): 0 bits, 
     Bits Received (since BERT started): 0 Kbits
     Bit Errors (since last sync): 0 bits
     Bits Received (since last sync): 0 Kbits

Loopback on T3 Interfaces

Loopback Description

You can use the following loopback on the clear and channelized T3/T1 interfaces.

Loopback

Description

loopback local

Loops the transmitting signal back to the receiver.

loopback network line

Loops the incoming signal back in the interface using the line loopback mode of the framer. The framer does not reclock or reframe the incoming data. All incoming data is received by the interface driver.

Configuring Loopback for T3 Interfaces

To set a loopback on the clear channel T3 interfaces, perform the following tasks in global configuration mode: 
 
enable
configure terminal
controller t3 0/0/1
loopback local
exit
To set a loopback network on the clear channel T3 interfaces, perform the following tasks in global configuration mode: 
 
enable
configure terminal
controller t3 0/0/1
loopback network line  
exit
To set a loopback on the channelized channel T3/T1 interfaces, perform the following tasks in global configuration mode: 
 
enable
configure terminal
controller t3 0/0/1
t1 1 loopback local
exit
To set a loopback network on the channelized channel T3/T1 interfaces for loopback network, perform the following tasks in global configuration mode: 
 
enable
configure terminal
controller t3 0/0/1
t1 1 loopback network line
exit

Note

To remove a loopback, use the no loopback command.

Associated Commands

The commands used to configure T3 Interfaces on 48xT3/E3 Interface Module.

Commands

URL

controller mediatype

https:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-c2.html#wp3512725718

mode t3

https:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-l2.html#wp5688885940

controller t1

https:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-c2.html#wp1472647421

controller t3

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-c2.html#wp1921350260

clock source

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-c2.html#wp6081785140

channelized

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-c1.html#wp7026926390

cem

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-c1.html#wp2184138077

cem-group

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-c1.html#wp2440628600

xconnect

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-t2.html#wp8578094790

t1 cem-group

https:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-t1.html#wp8472041760

payload-size dejitter-buffer

https:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-o1.html#wp3946673156

bert pattern

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-a1.html#wp3620978929

loopback

http:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-l2.html#wp2513399572

t1 loopback

https:/​/​www.cisco.com/​c/​en/​us/​td/​docs/​ios-xml/​ios/​interface/​command/​ir-cr-book/​ir-t1.html#wp3852360411

Additional References for Configuring 48-Port T3/E3 CEM Interface Module

Related Documents

Related Topic

Document Title

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

Standards and RFCs

Standard/RFC

Title

—

There are no standards and RFCs for this feature.

MIBs

MIB

MIBs Link

—

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http:/​/​www.cisco.com/​go/​mibs

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