Hardware Specifications
This appendix provides detailed shelf assembly hardware specifications for the Cisco ONS 15600 SDH. It includes the following sections:
•Shelf Specifications
•Card Specifications
•SFP/XFP Specifications
A.1 Shelf Specifications
This section provides bandwidth specifications; slot assignments; lists of cards and topologies; shelf dimensions; Cisco Transport Controller (CTC) specifications; the LAN, TL1, modem, and alarm interface specifications; and timing, database, environmental, and power specifications.
A.1.1 Bandwidth
The ONS 15600 SDH has the following bandwidth specifications:
•Total bandwidth: 320 Gbps
•Optical bandwidth: 40 Gbps per slot
A.1.2 Slot Assignments
The ONS 15600 SDH has the following slot assignments:
•Total card slots: 14
•Optical cards: Slots 1 to 4, 11 to 14
•TSC: Slots 5, 10
•SSXC: Slots 6/7, 8/9
A.1.3 Cards
The ONS 15600 SDH has the following cards:
•TSC
•SSXC
•ASAP
•OC48/STM16 LR16 1550
•OC48/STM16 SR16 1310
•OC192/STM64 LR4 1550
•OC192/STM64 SR4 1310
•OC192/STM64 4 Port ITU C-Band
A.1.4 Configurations
The ONS 15600 SDH has the following configurations:
•1+1 automatic protections switching (APS) for point-to-point and linear configurations
•Two-fiber subnetwork connection protection ring (SNCP)
•Path-protected mesh network (PPMN)
•Two-fiber multiplex section-shared protection ring (MS-SPRing)
•Four-fiber multiplex section-shared protection ring (MS-SPRing)
•Unprotected
A.1.5 Dimensions
The ONS 15600 SDH has the following dimensions:
•Height: 83.9 inches (2130 mm)
•Width: 23.6 inches (600 mm)
•Depth: 23.6 inches (600 mm)
•Weight: 500 lb (226.8 kg) (without cards)
A.1.6 Cisco Transport Controller
CTC has the following specifications:
•10/100BaseT
•TSC access: RJ-45 connector
•Backplane access: RJ-45 connector
A.1.7 External LAN Interface
The external LAN interface has the following specifications:
•10/100BaseT Ethernet
•Backplane access: RJ-45 connector
A.1.8 TL1 Craft Interface
The TL1 craft interface has the following specifications:
•Speed: 9600 bps
•Backplane (CAP/CAP2) access: EIA/TIA-232 DB-9 type connector
A.1.9 Modem Interface
The modem interface has the following specifications:
•Hardware flow control
•Backplane (CAP/CAP2) access: EIA/TIA-232 DB-9 type connector
A.1.10 Alarm Interface
The alarm interface has the following specifications:
•Visual: Critical, Major, Minor, Remote
•Audible: Critical, Major, Minor, Remote
•Alarm contacts: 0.045 mm, -48 VDC, 50 mA
•Backplane (CAP/CAP2) access: Alarm pin fields
A.1.11 BITS Interface
The building integrated timing supply (BITS) interface has the following specifications:
•2 DS-1 BITS inputs
•2 derived STM-N outputs
A.1.12 System Timing
The ONS 15600 SDH has the following system timing specifications:
•Holdover stability: Stratum 3E per Telcordia GR-253-CORE
•Free running accuracy: +/- 4.6 ppm
•Reference: External BITS, line, internal
A.1.13 Database Storage
The ONS 15600 SDH has the following database storage specifications:
•Nonvolatile memory: 512 MB, IDE FLASH memory
A.1.14 Environmental Specifications
The ONS 15600 SDH has the following environmental specifications:
•Operating temperature: 23 to 122 degrees Fahrenheit (-5 to +50 degrees Celsius)
•Operating humidity: 5 to 95 percent, noncondensing
A.1.15 Power Specifications
The ONS 15600 SDH has the following power specifications:
•Input voltage: -48 VDC
•Input current: 80 A per channel (six channels provided)
•Power terminals: Lug
Table A-1 lists the power requirements for each card.
Table A-1 Power Requirements for Individual Cards
|
|
|
|
TSC |
58 |
SSXC |
165 |
|
OC48/STM16 LR16 1550 |
170 |
OC48/STM16 SR16 1310 |
180 |
OC192/STM64 LR4 1550 |
180 |
OC192/STM64 SR4 1310 |
165 |
OC192/STM64 4 Port ITU C-Band |
180 |
|
ASAP |
170 |
Table A-2 lists the power requirements for an individual fan in the fan-tray assembly.
Table A-2 Power Requirements for Individual Fans
|
|
|
|
Minimum. at 48 V (ambient temperature less than 25 degrees Celsius (77 degrees Fahrenheit) |
12 |
0.25 |
41 |
Maximum at 48 V (ambient temperature greater than 25 degrees Celsius (77 degrees Fahrenheit) |
46 |
0.95 |
157 |
A.2 Card Specifications
This section provides specifications for the following cards:
•TSC
•SSXC
•OC48/STM16 LR/LH 16 Port 1550
•OC48/STM16 SR/SH 16 Port 1310
•OC192/STM64 LR/LH 4 Port 1550
•OC192/STM64 SR/SH 4 Port 1310
•OC192/STM64 4 Port ITU C-BandASAP
•Filler
A.2.1 TSC Card Specifications
Table A-3 shows the TSC card specifications.
Table A-3 TSC Card Specifications
|
|
CTC software |
Interface: 10/100BaseT LAN Backplane (CAP/CAP2) access: RJ-45 |
TL1 craft interface |
Speed: 10/100BaseT LAN Front panel access: RJ-45 type connector Backplane access: RJ-45 and EIA/TIA-232 DB-9 type connector |
Synchronization |
Stratum 3E, per Telcordia GR-1244 Free running access: Accuracy 4.6 ppm Holdover stability: 3.7 x10-7 ppm/day including temperature (< 255 slips in first 24 hours) Reference: External BITS, line, internal |
Operating temperature |
23 to 122 degrees Fahrenheit (-5 to +50 degrees Celsius) |
Operating humidity |
5 to 95 percent, noncondensing |
Dimensions |
Height: 16.50 in. (419 mm) Width: 1.10 in. (28 mm) Depth: 18.31 in. (465 mm) Card weight: 4.0 lb (1.81 kg) |
Compliance |
When installed in a node, ONS 15600 SDH cards comply with these safety standards: UL 60950, CSA C22.2 No. 950, EN 60950, IEC 60950 |
A.2.2 SSXC Specifications
Table A-4 shows the SSXC card specifications.
Table A-4 SSXC Card Specifications
|
|
Cross-connect |
Connection setup time: 7 microseconds Latency: 0.5 microseconds |
Operating temperature |
23 to 122 degrees Fahrenheit (-5 to +50 degrees Celsius) |
Operating humidity |
5 to 95 percent, noncondensing |
Dimensions |
Height: 16.50 in. (419 mm) Width: 2.36 in. (60 mm) Depth: 18.31 in. (465 mm) Card weight: 5.0 lb (2.27 kg) |
Compliance |
When installed in a node, ONS 15600 SDH cards comply with these safety standards: UL 60950, CSA C22.2 No. 950, EN 60950, IEC 60950 |
A.2.3 OC48/STM16 LR/LH 16 Port 1550 Specifications
Table A-5 shows the OC48/STM16 LR/LH 16 Port 1550 card specifications.
Table A-5 OC48/STM16 LR/LH 16 Port 1550 Card Specifications
|
|
Line |
Bit rate: 2.49 Gbps Code: Scrambled nonreturn to zero (NRZ) Fiber: 1550 nm single-mode Loopback mode: Facility Connectors: OGI Compliance: Telcordia GR-253 |
Transmitter |
Max. transmitter output power: +3 dBm Min. transmitter output power: -2 dBm Center wavelength: 1500 nm to 1580 nm Nominal wavelength: 1550 nm Transmitter: Distributed feedback (DFB) laser Note The CTC Maintenance > Transceiver tab shows the optical power transmitted (OPT) levels. CTC might show OPT levels at 1 dBm greater or less than the actual card OPT level. |
Receiver |
Max. receiver level: -9 dBm Min. receiver level: -28 dBm Receiver: InGaAs Avalanche Photo Diode (APD) photo detector Link loss budget: 26 dB minimum, with 1 dBm dispersion penalty |
Loopback mode |
Facility (Line) Note Use a 19 to 24 dBm fiber attenuator (15 to 20 dBm is recommended) when connecting a fiber loopback to an OC48/STM16 LR/LH 16 Port 1550 card. Never connect a direct fiber loopback. |
Operating temperature |
23 to 122 degrees Fahrenheit (-5 to +50 degrees Celsius) |
Operating humidity |
5 to 95 percent, noncondensing |
Dimensions |
Height: 16.50 in. (419 mm) Width: 1.50 in. (38 mm) Depth: 18.31 in. (465 mm) Card weight: 5.0 lb (2.27 kg) |
Compliance |
Telcordia GR-253 When installed in a node, ONS 15600 SDH cards comply with these safety standards: UL 60950, CSA C22.2 No. 950, EN 60950, IEC 60950 Eye safety compliance: Class 1 (21 CFR 1040.10 and 1040.11) and Class 1 (IEC 60825) laser products |
A.2.4 OC48/STM16 SR/SH 16 Port 1310 Specifications
Table A-6 shows the OC48/STM16 SR/SH 16 Port 1310 card specifications.
Table A-6 OC48/STM16 SR/SH 16 Port 1310 Card Specifications
|
|
Line |
Bit rate: 2.49 Gbps Code: Scrambled NRZ Fiber: 1310 nm single-mode Loopback mode: Facility Connectors: OGI Compliance: Telcordia GR-253 |
Transmitter |
Max. transmitter output power: -3 dBm Min. transmitter output power: -10 dBm Center wavelength: 1266 nm to 1360 nm Nominal wavelength: 1310 nm Transmitter: Fabry Perot laser Note The CTC Maintenance > Transceiver tab shows the OPT levels. CTC might show OPT levels at 1 dBm greater or less than the actual card OPT level. |
Receiver |
Max. receiver level: -3 dBm Min. receiver level: -18 dBm Receiver: Positive-intrinsic-negative (PIN) diode Link loss budget: 8 dBm min., with 1 dBm dispersion penalty |
Loopback mode |
Facility (Line) Note You must use a 3-dBm fiber attenuator when connecting a fiber loopback to an OC48/STM16 SR/SH 16 port 1310 card. Never connect a direct fiber loopback. |
Operating temperature |
23 to 122 degrees Fahrenheit (-5 to +50 degrees Celsius) |
Operating humidity |
5 to 95 percent, noncondensing |
Dimensions |
Height: 16.50 in. (419 mm) Width: 1.50 in. (38 mm) Depth: 18.31 in. (465 mm) Card weight: 5.0 lb (2.27 kg) |
Compliance |
Telcordia GR-253 When installed in a node, ONS 15600 SDH cards comply with these safety standards: UL 60950, CSA C22.2 No. 950, EN 60950, IEC 60950 Eye safety compliance: Class 1 (21 CFR 1040.10 and 1040.11) and Class 1 (IEC 60825) laser products |
A.2.5 OC192/STM64 LR/LH 4 Port 1550 Specifications
Table A-7 shows the OC192/STM64 LR/LH 4 Port 1550 card specifications.
Table A-7 OC192/STM64 LR/LH 4 Port 1550 Card Specifications
|
|
Line |
Bit rate: 9.96 Gbps Code: Scrambled NRZ Fiber: 1550 nm single mode |
Transmitter |
Max. transmitter output power: +7 dBm Min. transmitter output power: +4 dBm Center wavelength: 1530 nm to 1565 nm Nominal wavelength: 1550 nm Transmitter: Lithium niobate (LN) external modulator transmitter |
Receiver |
Max. receiver level: -9 dBm Min. receiver level: -22 dBm Receiver: APD/TIA Link loss budget: 24 dB min., with no dispersion or 22 dB optical path loss at BER = 1-12 including dispersion |
Loopback mode |
Payload Note Use a 19 to 24 dB fiber attenuator (15 to 20 is recommended) when connecting a fiber loopback to an OC192/STM64 LR/LH 4 Port 1550 card. Never connect a direct fiber loopback. |
Connectors |
OGI |
Operating temperature |
23 to 122 degrees Fahrenheit (-5 to +50 degrees Celsius) |
Operating humidity |
5 to 95 percent, noncondensing |
Dimensions |
Height: 16.50 in. (419 mm) Width: 1.50 in. (38 mm) Depth: 18.31 in. (465 mm) Card weight: 12.0 lb (5.44 kg) |
Compliance |
Telcordia GR-253 When installed in a node, ONS 15600 SDH cards comply with these safety standards: UL 60950, CSA C22.2 No. 950, EN 60950, IEC 60950 Eye safety compliance: Class 1 (21 CFR 1040.10 and 1040.11) and Class 1 (IEC 60825) laser products |
A.2.6 OC192/STM64 SR/SH 4 Port 1310 Specifications
Table A-8 shows the OC192/STM64 SR/SH 4 Port 1310 card specifications.
Table A-8 OC192/STM64 SR/SH 4 Port 1310 Card Specifications
|
|
Line |
Bit rate: 9.96 Gbps Code: Scrambled NRZ Fiber: 1310 nm single mode |
Transmitter |
Max. transmitter output power: -1 dBm Min. transmitter output power: -6 dBm Center wavelength: 1290 nm to 1330 nm Nominal wavelength: 1310 nm |
Receiver |
Max. receiver level: -1 dBm Min. receiver level: -11 dBm Link loss budget: -5 dB min., with no dispersion or 4 dB optical path loss at BER = 1-12 including dispersion |
Loopback mode |
Payload Note You must use a 3-dBm fiber attenuator when connecting a fiber loopback to an OC192/STM64 SR/SH 4 Port 1310 card. Never connect a direct fiber loopback. |
Connectors |
OGI |
Operating temperature |
23 to 122 degrees Fahrenheit (-5 to +50 degrees Celsius) |
Operating humidity |
5 to 95 percent, noncondensing |
Dimensions |
Height: 16.50 in. (419 mm) Width: 1.50 in. (38 mm) Depth: 18.31 in. (465 mm) Card weight: 12.0 lb (5.44 kg) |
Compliance |
Telcordia GR-253 When installed in a node, ONS 15600 SDH cards comply with these safety standards: UL 60950, CSA C22.2 No. 950, EN 60950, IEC 60950 Eye safety compliance: Class 1 (21 CFR 1040.10 and 1040.11) and Class 1 (IEC 60825) laser products |
A.2.7 ASAP Specifications
Table A-9 shows the ASAP card specifications.
Table A-9 ASAP Card Specifications
|
|
Carrier Card (CC) |
Contains slots for four pluggable ASAP I/O cards, which can be used to provide a variety of optical line interfaces. The CC provides 4 electrical VC4-16c or Gigabit Ethernet signals to each ASAP I/O card (for 16 total) and 16 redundant electrical VC4-16c matrix interfaces to the backplane. For SDH interfaces, the CC card provides pointer processing and overhead extraction/insertion. |
4PIO Pluggable I/O card |
The ASAP 4PIO module is a four-port multirate optical interface card. It has four slots for Small Form-factor Pluggable (SFP) optics. The four ports can be provisioned on a per-port basis as STM-1, STM-4, STM-16, or Gigabit Ethernet interfaces. |
1PIO Pluggable I/O card |
The ASAP 1PIO module is a single-port single-rate optical interface card. It has one slot for XFP optics. The port can be provisioned for one STM-64 interface. |
Payloads |
Nonconcatenated and/or concatenated payloads at VC3, VC4, VC4-2c, VC4-3c, VC4-4c, VC4-8c, VC4-16c, and VC4-64c are supported. For Gigabit Ethernet interfaces, Layer 1 Ethernet transport is also implemented. |
SFP support |
ONS-SE-Z1: Supports STM-1 SR-1, STM-4 SR-1, STM-16 IR-1 or GE LX ONS-SI-155-L2: Supports STM-1 LR-2 ONS-SI-622-L2: Supports STM-4 LR-2 ONS-SE-2G-L2: Supports STM-16 LR-2 ONS-SI-2G-S1: Supports STM-16, LR-2 |
XFP support |
ONS-XC-10G-S1: Supports STM-64 SR-1 ONS-XC-10G-L2: Supports STM-64 LR-2 |
Connectors |
Up to 16 SFP connectors (4 per 4PIO module) or 4 XFP connectors (1 per 1PIO module), at front edge of card |
Power |
130 W to 180 W (maximum) |
Operating temperature |
23 to 131 degrees Fahrenheit (-5 to +55 degrees Celsius) |
Operating humidity |
5 to 95 percent, noncondensing |
Dimensions |
Height: 16.50 in. (419 mm) Width: 1.50 in. (38 mm) Depth: 18.31 in. (465 mm) Card weight: approximately 6 pound = 2.72155422 kilograms |
Compliance |
Telcordia GR-253 When installed in a system, ONS 15600 SDH cards comply with these safety standards: UL 60950, CSA C22.2 No. 950, EN 60950, IEC 60950 Eye safety compliance: Class 1 (21 CFR 1040.10 and 1040.11) and Class 1 (IEC 60825) laser products |
A.2.8 Filler Card Specifications
Table A-10 shows the Filler card specifications.
Table A-10 Filler Card Specifications
|
|
Dimensions |
Height: 16.50 in. (419 mm) Width:1.50 in. (38 mm) Depth: 18.31 in. (465 mm) Card weight: 2.5 lb (1.134 kg) |
A.3 SFP/XFP Specifications
Table A-11 and Table A-12 list the specifications for Cisco ONS 15600 SDH SFPs and XFPs.
Table A-11 SFP Specifications (4PIO Only)
|
|
Transmitter Output Power Min/Max (dBm)
|
Receiver Input Power Min/Max (dBm)
|
ONS-SI-622-L2 |
OC-12, STM-4 |
-3.0 to 2.0 |
-28 to -8 |
ONS-SI-155-L2 |
OC-3, STM-1 |
-5.0 to 0.0 |
-34 to -10 |
ONS-SE-2G-L2 |
OC-48, STM-16 |
-2.0 to 3.0 |
-28 to -9 |
ONS-SE-Z1 |
OC-3, STM-1, OC-12, STM-4, OC-48, STM -16 |
-5.0 to 0 |
-23 to -3 (155.52/ 622.08 Mbps) -19 to -3 (1250 Mbps) -18 to 0 (2488.32 Mbps) |
ONS-SI-2G-S1 |
OC-48, STM-16 |
-2.0 to 3.0 |
-9 |
Table A-12 XFP Specifications (1PIO Only)
|
|
Transmitter Output Power Min/Max (dBm)
|
Receiver Input Power Min/Max (dBm)
|
ONS-XC-10G-S1 |
OC-192, STM-64 |
-6.0 to -1.0 |
-11.0 to -1.0 |
ONS-XC-10G-L2 |
OC-192, STM-64 |
0.0 to 4.0 |
-24.0 to -7.0 |
The OC-48/STM16 also supports 32-channel SFPs for DWDM applications; 32-channel SFPs can be plugged into the four-port ASAP card 4PIO module.
Some of the parameters common across all 32 DWDM SFPs include:
•Receiver wavelength: 1260 to 1620 nm
•Minimum overload: -9 dBm
•Maximum reflectance of receiver, measured at Rupees: -27 dB
•Maximum receiver power, damage threshold: +5 dBm
•Transmitter output power min/max : 0 to +4 dBm
Table A-13 lists the available DWDM SFPs.
Table A-13 ASAP Card 4PIO DWDM SFP Specifications
|
|
|
ONS-SC-2G-30.3 |
OC-48/STM16 |
1530.3 nm |
ONS-SC-2G-31.1 |
OC-48/STM16 |
1531.1 nm |
ONS-SC-2G-31.9 |
OC-48/STM16 |
1531.9 nm |
ONS-SC-2G-32.6 |
OC-48/STM16 |
1532.6 nm |
ONS-SC-2G-34.2 |
OC-48/STM16 |
1534.2 nm |
ONS-SC-2G-35.0 |
OC-48/STM16 |
1535.0 nm |
ONS-SC-2G-35.8 |
OC-48/STM16 |
1535.8 nm |
ONS-SC-2G-36.6 |
OC-48/STM16 |
1536.6 nm |
ONS-SC-2G-38.1 |
OC-48/STM16 |
1538.1 nm |
ONS-SC-2G-38.9 |
OC-48/STM16 |
1538.9 nm |
ONS-SC-2G-39.7 |
OC-48/STM16 |
1539.7 nm |
ONS-SC-2G-40.5 |
OC-48/STM16 |
1540.5 nm |
ONS-SC-2G-42.1 |
OC-48/STM16 |
1542.1 nm |
ONS-SC-2G-42.9 |
OC-48/STM16 |
1542.9 nm |
ONS-SC-2G-43.7 |
OC-48/STM16 |
1543.7 nm |
ONS-SC-2G-44.5 |
OC-48/STM16 |
1544.5 nm |
ONS-SC-2G-46.1 |
OC-48/STM16 |
1546.1 nm |
ONS-SC-2G-46.9 |
OC-48/STM16 |
1546.9 nm |
ONS-SC-2G-47.7 |
OC-48/STM16 |
1547.7 nm |
ONS-SC-2G-48.5 |
OC-48/STM16 |
1548.5 nm |
ONS-SC-2G-50.1 |
OC-48/STM16 |
1550.1 nm |
ONS-SC-2G-50.9 |
OC-48/STM16 |
1550.9 nm |
ONS-SC-2G-51.7 |
OC-48/STM16 |
1551.7 nm |
ONS-SC-2G-52.5 |
OC-48/STM16 |
1552.5 nm |
ONS-SC-2G-54.1 |
OC-48/STM16 |
1554.1 nm |
ONS-SC-2G-54.9 |
OC-48/STM16 |
1554.9 nm |
ONS-SC-2G-55.7 |
OC-48/STM16 |
1555.7 nm |
ONS-SC-2G-56.5 |
OC-48/STM16 |
1556.5 nm |
ONS-SC-2G-58.1 |
OC-48/STM16 |
1558.1 nm |
ONS-SC-2G-58.9 |
OC-48/STM16 |
1558.9 nm |
ONS-SC-2G-59.7 |
OC-48/STM16 |
1559.7 nm |
ONS-SC-2G-60.6 |
OC-48/STM16 |
1560.6 nm |
Table A-14 describes the power and noise limited performances parameters for the OC-SC-2G series SFPs.
Table A-14 Power and Noise Limited Performances
|
Power Limited Performances
|
Noise Limited Performances
|
Input power range |
-9 to -28 dBm |
At BER = 10-12 with SONET framed PRBS23 622 Mbps - 2.0 Gbps at OSNR1 of 20 dB, 0.1 nm bandwidth 2.0Gbps - 2.7Gbps at OSNR of 21dB, 0.1 nm bandwidth |
-9 to -22 dBm |
At BER = 10-12 with SONET framed PRBS23 At OSNR of 16 dB at 0.1 nm bandwidth |
Dispersion tolerance |
-800 to 3600 dBm |
622 Mbps - 2.0 Gbps Power penalty = 3 dB OSNR = 20 dB at 0.1 nm bandwidth (Noise penalty = 0 dB) |
-800 to 3600 dBm |
622 Mbps - 2.0 Gbps Noise penalty = 2 dB OSNR = 18 dB at 0.1 nm bandwidth (Power penalty = 0 dB) |
-800 to 2400 dBm |
2.0 Gbps - 2.7 Gbps Power penalty = 3 dB OSNR = 21 dB at 0.1 nm bandwidth (Noise penalty = 0 dB) |
-800 to 2400 dBm |
2.0 Gbps - 2.7 Gbps Noise penalty = 3 dB OSNR = 19 dB at 0.1 nm bandwidth (Power penalty = 0 dB) |
Table A-15 provides cabling specifications for the single-mode fiber (SMF) SFPs/XFPs. The ports of the listed SFPs/XFPs have LC-type connectors and the minimum cable distance for all SFPs/XFPs listed is 6.5 feet (2 m). Maximum cable distance for all SFPs/XFPs listed is 328 ft (100 m).
Table A-15 Single-Mode Fiber SFP/XFP Port Cabling Specifications
|
|
|
|
ONS-SI-622-L2 Long Reach |
1550 nm |
9 micron SMF |
80 km (49.71 mi.) |
ONS-SE-2G-L2 |
1550 nm |
9 micron SMF |
80 km (49.71 mi.) |
ONS-SE-Z1 |
1310 nm |
9 micron SMF |
15 km (9.3 mi.) |
ONS-SI-155-L2 |
1550 nm |
9 micron SMF |
80 km (49.71 mi.) |
ONS-XC-10G-S1 |
1310 nm |
9 micron SMF |
2 km (1.2 mi.) |
ONS-XC-10G-L2 |
1550 nm |
9 micron SMF |
80 km (49.71 mi.) |
ONS-SI-2G-S1 |
1310 nm |
9 micron SMF |
80 km (49.71 mi.) |