Manual

1-, 2-, and 4-Port T1/E1 HWICs and 8-Port T1/E1 Network Module
Information About T1/E1 HWICs and Network Module
3
Cisco IOS Release 12.4(11)XW5, and 12.4(20)T
Information About T1/E1 HWICs and Network Module
To configure the T1/E1 HWICs and network module, you should understand the following:
Interface Numbering on Cisco 2800 and Cisco 3800 Series Routers, page 3
Interface Numbering on Cisco 2800 and Cisco 3800 Series Routers
Table 1 summarizes the interface numbering on Cisco 2811, 2821, and 2851 routers and on Cisco 3800
series routers. Table 2 gives the port numbering for the T1/E1 HWICs and network module.
For illustrations of HWIC slots in the Cisco 2811, 2821, and 2851 routers, see Overview of Cisco 2800
Series Routers.
For illustrations of HWIC and network module slots in the Cisco 3825 and 3845 routers, see Overview
of Cisco 3800 Series Routers.
Some examples are as follows:
Port 0 of an HWIC in HWIC slot 0: 0/0/0
Port 1 of a 2- or 4-port HWIC in HWIC slot 1: 0/1/1
Port 3 of the 4-port HWIC in HWIC slot 2: 0/2/3
Port 6 of the 8-port network module in network module slot 2: 2/6
Table 1 Interface Numbering on Cisco 2800 and Cisco 3800 Series Routers
Router HWIC Interfaces Network Module Interfaces
2811, 2821, and
2851
0/HWIC slot/port
1
1. Interface numbering for HWIC interfaces on all routers begins with 0. Then, each router has four HWIC slots that are numbered from 0 to 3.
No support for the 8-port T1/E1 network module.
3825 0/HWIC slot/port
1
Network module slot/port
2
2. The 3825 router has two network module slots, numbered 1 to 2.
3845 0/HWIC slot/port
1
Network module slot/port
3
3. The 3845 router has four network module slots, numbered 1 to 4.
Table 2 Port Numbering on T1/E1 HWICs and Network Module
Interface Port Numbering
1-port T1/E1 HWIC 0
2-port T1/E1 HWIC 0 to 1
4-port T1/E1 HWIC 0 to 3
8-port T1/E1 network module 0 to 7