Cisco 2600 Series, Operation Manual

Page: 121 / 142

Connecting Analog Modem Network Modules to a Network 11-3
Supported Network Protocols
Supported Network Protocols
The analog modems described in this chapter support the following protocols:
•
All standard data rates from 300 bps to 33.6 kbps (V.34 bis)
•
V.42 bis and MNP 5 data compression
•
V.42, LAPM, and MNP 2 to 4 error correction
•
MNP 10 for high performance under all line conditions
•
MNP 10EC for high performance in analog cellular environments
Interface Numbering
Cisco IOS software identifies each modem uniquely by its slot number and a 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 8-port or 16-port analog modem network module is related to the slot
number where the module is installed and the number of the port in the module.
Cisco 3600 series router slot numbers begin at 0 at the bottom right of the chassis, as
viewed from the rear. Cisco 3620 router slots are numbered 0 and 1, as shown in
Figure 11-3. Cisco 3640 routers have two rows of slots. The bottom row is numbered 0 and
1 and the top row is numbered 2 and 3, as shown in Figure 11-4.
The Cisco 2600 series router’s single network module slot is always 1, as shown in
Figure 11-5.