Specifications

C-19
Cisco 7100 Series VPN Router Installation and Configuration Guide
78-6341-03
Appendix C Cable Specifications
Cisco 7120-AT3, Cisco 7140-2AT3, Cisco 7120-AE3, Cisco 7140-2AE3, Cisco 7120-SMI3, and Cisco 7140-2MM3 Cables
Cisco 7120-AT3, Cisco 7140-2AT3, Cisco 7120-AE3,
Cisco 7140-2AE3, Cisco 7120-SMI3, and Cisco 7140-2MM3
Cables
The AT3, AE3, MM3 (OC-3c/STM-1 multimode), and SMI3 (OC-3c/STM-1 single-mode intermediate
reach) interfaces in Cisco 7120 series and Cisco 7140 series routers are full duplex. You must use the
appropriate ATM interface cable to connect the interface with an external ATM network. These
interfaces are considered DTE devices.
Table C-18 summarizes the interface types, connectors, and cables.
Note The ATM port is considered a DTE device.
DL3100E Yes No
3
Yes
3
No
Kentrox Yes Yes
2
Yes
2
No
1. MDL = Maintenance Digital Link.
2. T3 and E3 serial ports support either scrambling or Kentrox subrate, not both at the same time.
3. DL3100E does not support scrambling. However, the E3 serial port can turn on scrambling in DSU mode 0 for connecting
to another E3 serial port. The E3 serial port supports either scrambling (in mode 0) or DL3100E subrate, not both at the
same time.
Table C-17 Feature Compatibilities of T3 and E3 Serial Port DSUs (continued)
Device Full Rate Scrambling Subrate MDL
1
Table C-18 AT3, AE3, MM3, and SMI3 Connector Types and Cables
Interface
Rate
(Mbps)
Connector
Type Cable Type
ITU-T G.957
Standard
Bellcore
GR-253
Standard
Wave-
length
Maximum
Distance
AT3 44.736 BNC Coaxial –––450 ft
(137.2 m)
AE3 34.368 BNC Coaxial –––1250 ft
(381 m)
MM3 155.52 SC 62.5/125
microns
multimode
Intra-office
STM-1 I-1
Short reach
OC3
1310 nm 1.2 mi
(2 km)
SMI3 155.52 SC 9 microns
single mod
e
Short-haul
STM-1 S-1.1
Intermediat
e reach
OC3
1310 nm 9.3 mi
(15 km)