Cisco 1601 Hardware Installation Guide - Page 142

Understanding Interface Numbering on Analog Modem WICs Analog Modem WAN Interface Cards Understanding Interface Numbering on Analog Modem WICs Cisco IOS software identifies each modem uniquely by its slot number and port number. Some Cisco IOS configuration commands identify asynchronous ports by an interface number (or a line number, which is the same as the interface number). The interface number of a port on an 1-port or 2-port analog WAN interface card is related to the slot number where the card is installed and the number of the port in the card. Slot numbering conventions for Cisco interface cards are explained in the "Interface Card Slots Available on Cisco Access Routers" section on page -8. Ports in the 1- and 2-port analog modem WAN interface cards are numbered in the same pattern as slot numbers, beginning at 0 at the lower right and continuing from right to left. The interface number of a port is determined in the following way: interface-number = (32 x slot-number) + port-number + 1 For example, modem port 1 in slot 1 corresponds to interface number (32 x 1) + 1 + 1 = 34. This is also the line number for the port. Port 1 in slot 1 is always assigned interface number 34, regardless of what is in slot 0. If you move the card from slot 1 to a different slot, however, its interface numbers change. Table 29 shows the range of interface numbers available for each type of analog modem card in each router slot. (Interface 0 is automatically assigned to the console.) Table 29 1- and 2-Port Analog Modem WIC Numbering Slot Number 0 1 2 3 4 5 6 Interface (1-Port WICs) Interface (2-Port WICs) 1 1-2 33 33-34 65 65-66 97 97-98 129 129-130 161 161-162 193 193-194 Connecting an Analog Modem WIC to a Network Use a straight-through RJ-11-to-RJ-11 cable (not included) to connect an analog modem WIC to a network. Step 1 Turn off and confirm that the router is turned off. Warning To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect the WIC-1AM-V2 and WIC-2AM-V2 interface cards only to intra-building or unexposed wiring or cable. The intrabuilding cable must be shielded and the shield must be grounded at both ends. The intra-building port(s) of the equipment or subassembly must not be metallically connected to interfaces that connect to the OSP or its wiring. These interfaces are designed for use as OL-12848-01 4