Cisco 10720 Configuration Guide - Page 30

Physical and Functional Overview Chapter 1 Product Overview Hardware Field Replaceable Units The Cisco 10720 Internet Router provides dedicated slots for the uplink card and the access card. The card cage is integrated into a rigid metal frame. The Cisco 10720 Internet Router field replaceable units are presented in the following sections: • Uplink Cards, page 1-4 • Access Card, page 1-6 • Redundant Power Supply, page 1-6 • Fan Assembly, page 1-7 • Mounts, page 1-7 • Cable Management, page 1-8 Uplink Cards The uplink cards are available with one of the following: • One OC-48c/STM16c DPT uplink fiber-optic port or two POS uplink fiber-optic ports • Two RPR/SRP uplink fiber-optic ports supporting SFP modules • Console and serial (AUX) ports only There is one slot for an uplink card in the chassis. The cards fit the upper slot of the router chassis. See Figure 1-3 for an example of a typical DPT uplink card. For more information about the uplink cards, versions of the uplink cards, and uplink card cabling, refer to the Cisco 10720 Internet Router Uplink Cards Installation and Configuration publication. Figure 1-3 10720-SR-LC DPT Uplink Card (Front View) TX A RX TX B RX CONSOLE AUX RESET PRCAWAXCARSTRIPASRVPKITETEHRRU PSCOYVAOSERWTRDEETRFEMAIMSLPTATUS 57670 The cable connector is a special LC optical connector. When using the card for DPT connections, the left port is the spatial reuse protocol (SRP) side A and the right port is SRP side B. When POS connections are made, the two ports are independent of each other. Each port consists of transmit (TX) and receive (RX). For additional information, see the "SONET Distance Limitations" section on page 3-11. The console/auxiliary card has console and serial (AUX) ports only. Cisco 10720 Internet Router Installation and Configuration Guide 1-4 78-13062-10