Specifications

Configuring and Managing Integrated Modems
Managing Modems
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Cisco IOS Dial Technologies Configuration Guide
Modem pooling offers these benefits:
• A certain number of modem ports can be guaranteed per DNIS.
• Maximum simultaneous connection limits can be set for each DNIS.
The following restrictions apply:
• Modem pooling is not a solution for large-scale dial access. It cannot be used to create virtual
modem pools across multiple access servers that are connected. Modem pooling is physically
restricted to one access server.
• MICA and Microcom technology modems support modem pooling. However, only MICA modems
support modem pooling for CT1 and CE1 configurations using CAS. To use modem pooling with
CT1 or CE1 connections, you must reserve at least two modems in the default modem pool. These
reserved modems decode DNIS before handing off calls to the modems assigned to modem pools.
If you see many call failures appearing on the access server, try assigning more modems to the
default pool. Use the show modem and show modem summary EXEC commands to display the
modem call failure and success ratio.
• No MIBs support modem pooling.
• The same DNIS cannot exist in more than one modem pool.
Modem pooling is supported on the Cisco AS5300 access servers. To configure and manage modems,
perform the tasks in the following sections; all tasks are optional and depend upon the needs of your
system.
• Creating a Modem Pool (Required)
• Verifying Modem Pool Configuration (As required)
Creating a Modem Pool
You must first decide to physically partition or virtually partition your modems. For more information,
see the previous section, “Configuring Modem Pooling.” After you have made this decision, create a
modem pool for a dial-in service or specific customer by using the following commands beginning in
global configuration mode.
Command Purpose
Step 1
Router(config)# modem-pool name
Creates a modem pool and assigns it a name, and starts
modem pool configuration mode.
Step 2
Router(config-modem-pool)# pool-range number - number
Assigns a range of modems to the pool. A hyphen (-) is
required between the two numbers. The range of
modems you can choose from is equivalent to the
number of modems in your access server that are not
currently associated with another modem pool.
Step 3
Router(config-modem-pool)# called-number number
[max-conn
number ]
Assigns the DNIS to be used for this modem pool.
The max-conn option specifies the maximum number
of simultaneous connections allowed for this DNIS. If
you do not specify a max-conn value, the default (total
number of modems in the pool) is used.
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Step 4
Router(config-modem-pool)# Ctrl-Z
Returns to EXEC mode.