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C-21

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

MM3 and SMI3 Cables and Receptacles

The MM3 (OC-3c/STM-1 multimode) and SMI3 (OC-3c/STM-1 single-mode intermediate reach)

interfaces provides an interface to ATM switching fabrics for transmitting and receiving data at rates of

up to 155 Mbps bidirectionally. The MME and SMI3 interfaces connect to SONET/SDH, 155-Mbps

multimode or single-mode optical fiber.

For SONET/SDH multimode and SONET/SDH single-mode connections, use one duplex SC connector

(see Figure C-12) or two simplex SC connectors (see Figure C-13). The simplex and duplex SC

connectors are shipped with removable dust covers on each connector.

Figure C-12 Duplex SC Connector

Figure C-13 Simplex SC Connector

An OC-3 ATM interface cable, which is used to connect your router to an external DSU (an ATM

network), is available for use with the MM3 and SMI3 interfaces. Cables can be obtained from an outside

cable vendor.

Single-mode and multimode cables should perform to the specifications listed in Table C-19.

H2214

H2399

Table C-19 Fiber-Optic Cable Speciﬁcations

Standard Maximum Path Length Cabling

ISO/IEC 9314-3 1.2 miles (2 km) all cables in a

connection, end to end

62.5-micron core with an

optical loss of 0–9 dB, or

50-micron core with an optical

loss of 7 dB

IEC 793-2 24.8 mi (40 km) for SML

and

9.3 mi (15 km) for SMI

1. SML = single-mode long reach.

2. SMI = single-mode intermediate reach.

9-micron core

ANSI/TIA/EIA-492CAAA 24.8 mi (40 km) for SML and

9.3 mi (15 km) for SMI

9-micron core

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