Cisco 2600 Series Routers
Cisco Network Modules Hardware Installation Guide
1-10
Figure 1-4 shows the following unit numbers:
• First Ethernet interface, referred to as Ethernet 0/0
• Token ring interface, referred to as Token Ring 0/0
• Slot W0, serial interface 0, referred to as serial 0/0
• Slot W1, serial interface 1, referred to as serial 0/1
• Slot 1, Ethernet interface 0, referred to as Ethernet 1/0
• Slot 1, Ethernet interface 1, referred to as Ethernet 1/1
• Slot 1, serial interface 0, referred to as serial 1/0
• Slot 1, BRI interface 0, referred to BRI 1/0
Note The 2E 2-slot module described in this example provides both an attachment unit
interface (AUI) and 10BaseT port. Only one of these ports can be used at a time. The
module automatically detects which port, AUI or 10BaseT, is in use.
Voice Interface Numbering in Cisco 2600 Series Routers
Voice interfaces are numbered differently from WAN interfaces described in the previous
section, “Slot and Unit Numbering.” Voice interfaces are numbered as follows:
interface type chassis slot/voice module slot/voice interface
If you have a four-channel voice network module installed in slot 1 of your router, the voice
interfaces will be:
• Slot 1, voice network module slot 0, voice interface 0, referred to as voice 1/0/0 (closest
to the chassis WAN interface card slots)
• Slot 1, voice network module slot 0, voice interface 1, referred to as voice 1/0/1
• Slot 1, voice network module slot 1, voice interface 0, referred to as voice 1/1/0
• Slot 1, voice network module slot 1, voice interface 1, referred to as voice 1/1/1 (farthest
from the chassis WAN interface card slots)
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