- Overview of Dial Interfaces, Controllers, and Lines
- Configuring Asynchronous Lines and Interfaces
- Asynchronous Call Queueing by Role
- Configuring Asynchronous Serial Traffic Over UDP
- Configuring and Managing Integrated Modems
- 1- and 2-Port V.90 Modem WICs for Cisco 2600 and Cisco 3600 Series Multiservice Platforms
- Call Tracker show Commands Extensions
- Cisco NM-8AM-V2 and NM-16AM-V2 Analog Modem Network Modules with V.92
- MICA and NextPort Modem Tech-Support Command Additions
- PIAFS Wireless Data Protocol Version 2.1 for Cisco MICA Modems
- V.92 and V.44 Support for Digital Modems
- V.92 Modem on Hold for Cisco AS5300 and Cisco AS5800 Universal Access Servers
- V.92 Modem on Hold for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers
- V.92 Quick Connect for Cisco AS5300 and Cisco AS5800 Universal Access Servers
- V.92 Quick Connect for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers
- V.92 Reporting Using RADIUS Attribute v.92-info
- Configuring and Managing Cisco Access Servers and Dial Shelves
- Configuring and Managing External Modems
- Modem Signal and Line States
- Creating and Using Modem Chat Scripts
- Cisco Modem User Interface
- Modem Script and System Script Support in Large-Scale Dial-Out
- Leased and Switched BRI Interface for ETSI NET3
- ISDN BCAC and Round-Robin Channel Selection Enhancements
- Configuring Virtual Asynchronous Traffic over ISDN
- Configuring Modem Use over ISDN BRI
- Configuring X.25 on ISDN
- Configuring X.25 on ISDN Using AO/DI
- Configuring ISDN on Cisco 800 Series Routers
- Cisco IOS Software Feature Removal
- Configuring ISDN PRI
- Dialing Number Enhancement
- ISDN BCAC and Round-Robin Channel Selection Enhancements
- Configuring ISDN Special Signaling
- Configuring Network Side ISDN PRI Signaling, Trunking, and Switching
- Preparing to Configure DDR
- Configuring Legacy DDR Spokes
- Configuring Legacy DDR Hubs
- Configuring Peer-to-Peer DDR with Dialer Profiles
- Dialer Map VRF-Aware for an MPLS VPN
- Dialer Persistent
- PPPoE Client DDR Idle-Timer
- Redial Enhancements
- Rotating Through Dial Strings
- Configuring Dialer CEF
- CEF Support for Dialer Profiles on Cisco 7500 Routers
- Configuring Snapshot Routing
- Reliable Static Routing Backup Using Object Tracking
- Configuring Dial Backup for Serial Lines
- Configuring Dial Backup Using Dialer Watch
- Dialer Watch Connect Delay
- VRF Aware Dialer Watch
- Configuring Dial Backup with Dialer Profiles
- ISDN Backup in MPLS Core
- Configuring Cisco Easy IP ..
- Configuring Virtual Template Interfaces
- Multiclass Multilink PPP
- Configuring Asynchronous Callback
- Configuring PPP Callback
- Configuring ISDN Caller ID Callback
- Configuring BACP
- Configuring an IP Local Pools Holdback Timer
- Configuring per-User Configuration
- Configuring Resource Pool Management
- Configuring Wholesale Dial Performance Optimization
- Large-Scale Dial-Out
- Dial-Out DS0 Level Trunk Group
- L2TP Large-Scale Dial-Out
- L2TP Large-Scale Dial-Out per-User Attribute via AAA
- Modem Script and System Script Support in Large-Scale Dial-Out
- Large-Scale Dial-Out (LSDO) VRF Aware
- Peer Pool Backup
- Dial Networking Business Applications
- Enterprise Dial Scenarios and Configurations
- Telco and ISP Typical Dial Scenarios and Configurations
- Modem Initialization Strings
1- and 2-Port V.90 Modem WICs for Cisco 2600 and Cisco 3600 Series Multiservice Platforms
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This feature was integrated into the Cisco IOS Release 12.2(8)T. |
The 1- and 2-port V.90 modem WAN interface cards (WICs) for Cisco 2600 and 3600 series multiservice platforms provide low-density integrated modems to satisfy the market demand for remote management, dial-backup, and low-density remote-access servers (RAS).
This document describes the 1-port and 2-port V.90 modem WIC feature and contains the following sections:
Feature Overview
Three applications are available for the V.90 modem WIC on the Cisco 2600 and Cisco 3600 series multiservice platforms:
Remote Router Management and Out-of-Band Access
In this mode, the modem WIC is used as a dial-in modem for remote terminal access to the router’s command-line interface (CLI) for configuration, troubleshooting, and monitoring. The modem WIC acts similar to a modem that is connected to the AUX port of a router, but the integrated nature of the modem WIC greatly decreases customer configuration time and deployment and sustaining costs. Typically, the 1-port modem WIC is used for this application. Connection speeds of up to 33.6 kbps are possible.
Asynchronous Dial-on-Demand Routing and Dial-Backup
In this mode, the V.90 modem WIC transports network traffic. When ISDN service is not available and the traffic load does not justify a leased-line or Frame Relay connection, asynchronous dial-on-demand routing (DDR) is often the only choice for making a WAN connection. Even at sites that do have leased-line or Frame Relay connection, asynchronous DDR can increase bandwidth during sustained traffic load. In addition, when the primary leased-line or Frame Relay link is down during an outage, asynchronous dial-backup provides a secondary way to make the WAN connection. Both the 1-port and 2-port versions of the V.90 modem WIC can be used for this application.
For more information on Asynchronous Dial-on-Demand Routing and Dial-Backup, please see the document, Configuring Dial Backup for Serial Lines :
http://cisco.com/en/US/docs/ios/dial/configuration/guide/dia_preparing_ddr.html
Two ports on one modem WIC (or even three or more ports spanning multiple modem WIC cards) can be combined using Multilink PPP (MLP) to increase connection speeds in a scalar manner. Each connection is capable of V.90 speeds (up to 56 kbps) when connecting to a digital V.90 server modem.
For more information on MLP, please see the document, Multilink PPP for DDR—Basic Configuration and Verification :
Low-Density Analog RAS Access
In this application, the V.90 modem WIC enables the platform to provide the services of a typical small remote access server (RAS). One service allows remote users to dial in and gain access to resources on the LAN (or even across the WAN). The analog modems in the modem WIC allow dial-in connection speeds of up to 33.6 kbps, but MLP can bind multiple links together and increase the throughput.
Another service allows PCs (running Cisco DialOut Utility) on the LAN to use the modems for dial-out. Users can connect to other modems (bulletin boards, AOL, ISPs, and so on) or fax machines. The modem WIC allows dial-out connection speeds of up to 56 kbps when dialing a digital V.90 server modem or up to 33.6 kbps when dialing another analog modem. Fax calls connect at up to 14.4 kbps.
Typical RAS deployments with the V.90 modem WIC use the 2-port modem version. With enough slots, the V.90 modem WIC can be used to scale to up to 24 modems in a Cisco 3660 multiservice platform.
There is no limit for lines in the MLP bundle with WICs and population of WICs on any Cisco 2600 series or Cisco 3600 series multiservices platforms.
Benefits
The 1-port and 2-port V.90 modem WIC feature provides the following benefits:
Restrictions
- Cisco 2600 ip —8M Flash, 32M DRAMM.
- Cisco 3620 ip plus—16M Flash, 48M DRAMM.
- Cisco 3620 enterprise—16M Flash, 64M DRAMM.
- Cisco 3640 ip plus—16M Flash, 64M DRAMM.
- Cisco 3640 enterprise—16M Flash, 64M DRAMM.
- Cisco 3660 ip plus—16M Flash and 64M DRAMM.
- Cisco 3660 enterprise—16M Flash and 64M DRAMM.
Ensure that the RJ-11/CA11 telephone cable is disconnected from the modem WIC
before installing or removing the modem WIC from the router. The phone jack can have DC potential (up to 56.5 VDC) and can have ring signal (up to 150 VAC) in the United States.
Ensure that the router is powered
OFF before installing or removing the modem WIC from the router. The modem WICs do
not support online insertion and removal (hot-swap).
Other than some currently unsupported commands, the V.90 modem WIC supports all commands available for modem WICs as described in the Cisco IOS Wide Area Networking Configuration Guide and the Cisco WAN Interface Cards Installation and Configuration Guide. For troubleshooting and verification, use only the following commands:
clear modem [ counters ][ slot/modem # | group group # | all ]
Related Features and Technologies
For general and specific information on wide-area networking, see the following documents:
- Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2 http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fwan_c/index.htm
- Cisco IOS Wide-Area Networking Command Reference, Release 12.2 http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fwan_r/index.htm
Related Documents
- WAN Interface Cards Hardware Installation Guide
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/wan_mod/index.htm - Modem-Router Connection Guide
http://www.cisco.com/warp/public/76/9.html - Cisco 3600-Series Router Configurations
http://www.cisco.com/warp/public/793/access_dial/3600_index.html - Cisco IOS Dial Services Quick Configuration Guide
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121sup/121dsqcg/index.htm
Supported Platforms
The following Cisco multiservice platforms are supported for the Cisco IOS Release 12.2(8)T:
Supported Standards, MIBs, and RFCs
No new or modified standards are supported by this feature.
No new or modified MIBs are supported by this feature.
To obtain lists of MIBs supported by platform and Cisco IOS release and to download MIB modules, go to the Cisco MIB web site on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
Configuration Tasks
Configuration tasks required for setting up the modem WIC for proper operation are:
Asynchronous Interface Configuration
To configure the asynchronous interface on the V.90 modem WIC, use the following commands, starting in global configuration mode:
Note pool123 is a name chosen for the pool used for defining the range of IP addresses for remote clients.
Line Configuration
To configure the line on the V.90 modem WIC, use the following commands, starting in global configuration mode:
Alternative Configurations for the Modem WIC
Configuring the Group Asynchronous Interface
Configuring the Dialer List
Configuring the Line
Configuring the Dialer Interface
Configuring for Asynchronous Dial Backup
The following example shows an asynchronous dial backup configuration:
In this example, the interface S2/0 is configured as a primary link. Configuring the route through the backup interface (the V.90 modem WIC in this case) is very important. 10.0.0.0 in the IP route indicates the network number of the remote end. Thus, all packets for the destination IP are routed through the backup link if the primary link goes down. The 180 in the route command indicates the cost of the route taken (It should be more than the cost of the primary route). This avoids the packets taking the backup link when the primary link is up.
Verifying the V.90 Modem WIC Configuration
Shown below are a few of the many commands that can be used to verify, monitor, and troubleshoot the V.90 modem WIC. Other commands are described in the Related Documents.
The show interface async [tty-number] command shows the state of the specified asynchronous interface.
The show modem [slot/port | group number] command shows various performance statistics for a modem or group of modems.
Troubleshooting the V.90 Modem WIC Operation
To aid in troubleshooting the V.90 modem WIC operation, use the debug modem command, as shown in the following example:
This command shows the state of the tty lines.
Command Reference
This feature uses no new or modified commands. For information about all Cisco IOS commands, go to the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or to the Cisco IOS Master Commands List.
Glossary
baud rate —bits per second data rate of an asynchronous interface.
DDR —dial-on-demand routing. Also known as direct data routing or dial-up routing (PPP or IP).
DRAMM —Dynamic Random Access Memory Module.
DS0 —A single 64 kbps channel of a T1 span.
DSP —digital signal processor.
DSPM —digital signal processing module—voice module card.
IOS —Internet Operating System.
ISDN —Integrated Services Digital Network.
OIR —Online insertion and removal (hot swap).
POTS —Plain old telephone service.
PSTN —Public Switched Telephone Network.
TDM —time-division multiplexing. Also used to describe a single channel on a TDM bus.
Note For a list of other internetworking terms, see the Internetworking Terms and Acronyms document available on the Documentation CD-ROM and Cisco Connection Online (CCO) at the following URL: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ita/index.htm.
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