Step 1
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enable
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Enables privileged EXEC mode.
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Step 2
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configure terminal
Router# configure terminal
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Enter global configuration mode.
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Step 3
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controller {t1 |e1 } slot/subslot/port
Router(config)# controller t1 0/2/0
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Enters controller configuration mode for the network interface module.
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Step 4
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Do one of the following: framing {sf |esf } or framing {crc4 |no-crc4 }
Router(config-controller)# framing esf
Router(config-controller)# framing crc4
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In T1 configurations, specifies super frame (sf ) or extended super frame (esf ) as the frame type for data lines. Default is esf .
In E1 configurations, specifies cyclic redundancy check 4 (crc4 ) or no-crc4 as the frame type for data lines. Default is crc4 .
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Step 5
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Do one of the following: linecode {ami |b8zs } or linecode {ami |hdb3 }
Router(config-controller)# linecode b8zs
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In T1 configurations, specifies alternate mark inversion (AMI) or bipolar 8-zero substitution (b8zs) as the linecode. Default
is b8zs.
Note
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When using linecode AMI, we recommend that you select 56 kbps as the speed or make sure that the channel groups created do
not contain all the timeslots. See step 11. This is to avoid exceeding the “15 zeroes” threshold specified by standards.
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Step 6
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fdl {att |ansi |both }
Router(config-controller)# fdl both
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T1 only. Sets the facility data link (fdl) exchange standard for T1 interfaces using esf framing. You can select the ATT standard
(ATT TR54016), the ANSI standard (ANSI T1.403), or both standards. Default is ansi . To disable fdl, enter the no fdl command.
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Step 7
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clock source {internal | line [primary | secondary ] | network }
Router(config-controller)# clock source network
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Specifies the clock source. The options are as follows:
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internal—Sets the controller framer as the clock master.
The clock source i nternal command is only applicable with the channel-group command and the pri-group (for data) command.
Note
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The pri-group command is supported on the NIM-xCE1T1-PRI for data without the keyword voice-dsp .
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line—Specifies the phase-locked loop (PLL) on a port. When both a primary port and a secondary port are configured and the
primary port fails, the PLL switches over to the secondary. When the PLL on the primary port becomes active again, the PLL
automatically switches to the primary port.
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network—Sets the controller to sync to the TDMSW clock for both TDM voice and data support. This configures the far end of
the T1/E1 line as the clock line.
Default is line.
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Step 8
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line-termination {75-ohm |120-ohm }
Router(config-controller)# line-termination 75-ohm
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E1 only. Sets the line termination on an E1 controller.
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Step 9
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loopback {diagnostic | local {payload | line } | remote {iboc | esf {payload | line }}}
Router(config-controller)# loopback remote esf line
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Sets the loopback method for testing the interface. Options are:
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diagnostic —Loops the transmit signal back to receive.
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local —Puts the interface into local loopback mode at the payload or line level.
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remote —Puts the interface into remote loopback mode through an inband bit oriented code (iboc) or, for T1 only, remote esf , which uses fdl codes to set payload or line levels.
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Step 10
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Do one of the following: cablelength long
db-loss-value or cablelength short
length
Router(config-controller)# cablelength short 110
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T1 only.The cablelength long command attenuates the pulse from the transmitter using pulse equalization and line build-out. This command applies to cables
longer than 660 feet. Loss values are:
Default attenuation is 0db.
The cablelength short command sets transmission attenuation for cable lengths of 660 feet or less. When you use the cablelength short command, specify the length as follows:
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110 for cable lengths from 0 to 110 feet
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220 for cable lengths from 111 to 220 feet
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330 for cable lengths from 221 to 330 feet
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440 for cable lengths from 331 to 440 feet
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550 for cable lengths from 441 to 550 feet
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660 for cable lengths from 551 to 660 feet
There is no default cable length.
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Step 11
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channel group
channel-group-number {timeslots
range [speed
kbps ] | unframed }
Router(config-controller)# channel group 1 timeslots 1-4
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Configures the serial WAN on a T1 or E1 interface by specifying channels and their timeslots.
For T1, values are as follows:
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channel-group-number is from 0 to 23.
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timeslots range is from 1 to 24.
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Default value of speed for T1 is 64 kbps. Configuration of speed is optional.
For E1, values are as follows:
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channel-group-number is from 0 to 30.
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timeslots range is from 1 to 31.
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Default value of speed for E1 is 64 kbps. Configuration of speed is optional.
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unframed (E1 only) specifies that all 31 timeslots are to be used for data and that none are to be used for framing signals.
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Step 12
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national reserve
N sa4 sa5 sa6 sa7 sa8
Router(config-controller)# national reserve 0 1 1 1 1 0
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E1 only. Sets the six required national bits in E1 in the G.751 frame. Default is 1 1 1 1 1 1.
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Step 13
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crc-threshold
value
Router(config-controller)# crc-threshold 500
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T1 only. Defines a severely errored second by specifying the number of CRC errors that must occur in one second to reach the
severely errored second state. Default is 320.
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Step 14
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yellow {generation |detection }
Router(config-controller)# no yellow detection
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Enables generation and detection of yellow alarms. Default condition is that generation and detection of yellow alarms are enabled.
Use the no form of the command to disable yellow alarm detection.
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Step 15
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bert pattern
pattern
interval
time
Router(config-controller)# bert pattern 2^11 interval 1440
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(Optional) Activates the BERT with the chosen test pattern for a specified duration. Configure BERT patterns on the T1/E1
network interface modules as follows:
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When the linecode is AMI, use patterns 2^11, 2^15, or 2^20-QRSS.
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When the linecode is b8zs or hdb3, use patterns 2^11, 2^15, 2^20-QRSS, or 2^20-O.153.
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The interval time is from 1 to 14,400 minutes.
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