Configuration Example; Configuring The Digital Modem Network Module For The Cisco 3640 Router; Prerequisites - Cisco 2620 Configuration Manual

Configuring the Digital Modem Network Module for the Cisco 3640 Router

Configuration Example

The following example enables hardware compression and PPP encapsulation on serial interface 3/1.
Although the Serial interface in slot 3/1 is configured with the compress stac command, the actual data
compression takes place in the hardware compression card inserted in a different slot.
Router(config)# interface serial 3/1
Router(config-if)# encapsulate ppp
Router(config-if)# compress stac
Router(config-if)# exit
Router(config)#
Configuring the Digital Modem Network Module for the
Cisco 3640 Router
The Digital Modem Network Module for the Cisco 3640 is a high-density digital network module
containing 6, 12, 18, 24, or 30 digital (MICA) modems. These modems provide a direct digital
connection to an Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) channel. This
digital modem network module allows the access server to support a mix of both digital data calls
(ISDN) and analog modem calls over a single digital network interface.
Depending on the modem license you purchase with your Cisco 3640, the modems on the Digital Modem
Network Module are either manageable or not manageable by Cisco IOS software commands. If the
license you purchase includes this modem management capability, you can use the modem management
commands to gather call and performance statistics at any time, even if there is an active call on the
modem.
The Digital Modem Network Module for the Cisco 3640 provides the following benefits:
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Prerequisites

Before you can configure a modem interface, complete the following prerequisite tasks:
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Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
3-50
Enables you, as the Enterprise customer, to support a mix of digital (ISDN) and POTS analog
modem calls over a single digital network interface.
Modem management commands enable you to gather call and performance statistics.
Supports 56 kbps modem connections via the K56 Flex and V.90 standards when the portware for
these standards becomes available.
Install a PRI network module and another module (such as Ethernet) to provide connectivity to the
LAN. Digital modem network modules do not provide physical network interfaces of their own, but
instead handle analog calls passing through the PRI network module. The PRI module is capable of
concurrently handling digital ISDN data and remote voice-channel (analog) modem connections.
The digital modem module provides a pool of available modems that can be used for both incoming
and outgoing calls.
For information on how to correctly install a PRI network module, refer to the 1-Port and 2-Port
ISDN-PRI Network Module Configuration Note. For information on how to install an Ethernet
module, refer to the 1-Port Ethernet Network Module Configuration Note or the 4-Port Ethernet
Network Module Configuration Note. For other modules, refer to the specific configuration notes
pertaining to them.
Chapter 3 Configuring with the Command-Line Interface
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