Cisco 2691 Series, Quick Start Manual, Page: 23 / 28

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•
A WIC in each WIC slot (containing interfaces Serial 0/0 and Serial 0/1 in physical slot W0, interface Serial 0/2 in physical
slot W1, and interface BRI 0/0 in physical slot W2)
–
If physical slot W0 is empty and physical slot W1 contains a 1-port serial WIC, the interface number in the WIC is
numbered Serial 0/0.
–
If slot W0 contains a 2-port serial WIC and slot W1 contains a 1-port serial WIC, the interfaces in physical slot W0 are
numbered Serial 0/0 and Serial 0/1, and the interface in physical slot W1 is numbered Serial 0/2.
–
If slot W0 contains a 2-port serial WIC and slot W1 contains a 1-port BRI WIC, the interfaces in physical slot W0 are
numbered Serial 0/0 and Serial 0/1, and the interface in physical slot W1 is numbered BRI 0/0.
Note The slot number for all WIC interfaces is always 0. (The W0 and W1 slot designations are for physical slot
identification only.) Interfaces in the WICs are numbered from right to left, starting with 0/0 for each interface type,
regardless of which physical slot the WICs are installed in.
Figure 10 Interface Numbering in Cisco 2691 Routers
Voice Interface Numbering
Voice interfaces are numbered as follows:
chassis-slot / voice-module-slot / voice-interface
If a 4-channel voice network module is installed in chassis slot 1, the voice interfaces are:
•
1/0/0—Chassis slot 1/Voice module slot 0/Voice interface 0
•
1/0/1—Chassis slot 1/Voice module slot 0/Voice interface 1
• 1/1/0—Chassis slot 1/Voice module slot 1/Voice interface 0
• 1/1/1—Chassis slot 1/Voice module slot 1/Voice interface 1
8
Where to Go Next
For additional detailed configuration procedures, refer to the appropriate Cisco 2691 documentation or Cisco IOS software
documentation, available online on Cisco.com:
Tip See the “Obtaining Documentation” section on page 24 for help in locating these documents.
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SEE MANU
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EN
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T1 1/1
T1 1/0
FastEthernet 0/1
FastEthernet 0/0
BRI 0/0
Serial 0/2
Compact Flash slot
Serial 0/1
Serial 0/0