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Table 7
Slot Number
Onboard ports
0
1
2
3
1. A VWIC in slots 1, 2, and 3 can operate in both data and voice mode; in slot 0, a VWIC can operate only in voice
On the Cisco 2801 router, the numbering format for configuring an asynchronous interface is 0/slot/port.
Note
To configure the line associated with an asynchronous interface, simply use the interface number to
specify the async line. For example, line 0/1/0 specifies the line associated with interface serial 0/1/0 on
a WIC-2A/S in slot 1. Similarly, line 0/2/1 specifies the line associated with interface async 0/2/1 on a
WIC-2AM in slot 2.
Table 8
Interface Numbering on Cisco 2811, Cisco 2821, and Cisco 2851 Integrated Services Routers
Port Location
Built into the chassis front panel Interface-type port
Built into the chassis rear panel
In an interface card (HWIC,
HWIC-D, WIC, VWIC, VIC)
plugged directly into an HWIC
slot in a chassis
In an interface card (WIC,
VWIC, VIC) plugged into a slot
in a network module
Built into a network module
(NME, NME-X, NMD,
NME-XD)
FXS or FXO port in an extension
voice module (EVM)
OL-5783-01
Interface Numbering on Cisco 2801 Series Routers
Slot Type
Fast Ethernet
VIC / VWIC (voice only)
HWIC / WIC / VIC / VWIC
WIC / VIC / VWIC
HWIC / WIC / VIC / VWIC
mode.
Interface Numbering Scheme
Interface-type 0 / port
Interface-type 0 / interface-card-slot
Interface card slots built into the chassis are labeled
Note
HWIC slot-number on Cisco 2800 series routers .
5
Interface-type 1
5
Interface-type 1
6
Interface-type 2
FXS/DID port numbers 0 to 7 are built into the EVM.
FXS/FXO port numbers 8 to 15 are in expansion module 0.
FXS/FXO port numbers 16 to 23 are in expansion module 1.
Interface Numbering Range
0/0 and 0/1
0/0/0 to 0/0/3
1
0/1/0 to 0/1/3 (single-wide HWIC)
0/1/0 to 0/1/7 (double-wide HWIC)
1
0/2/0 to 0/2/3
1
0/3/0 to 0/3/3 (single-wide HWIC)
0/3/0 to 0/3/7 (double-wide HWIC)
3
/ port
/ interface-card-slot / port
/ port
7
/ 0
/ port
Interface Numbering
Examples
usb 0
usb 1
interface fa 0/x
interface gi 0/x
interface serial 0/x/y
interface async 0/x/y
line 0/x/y
interface fa 0/x/y
voice-port 0/x/y
controller t1 1/x/y
voice-port 1/x/y
interface serial 1/x/y
interface async 1/x/y
line 1/x/y
interface gi 1/x
interface serial 1/x
interface async 1/x
line 1/x
voice-port 2/0/x
Overview of Cisco 2800 Series Routers
1, 2
4
4
4
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