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Updated:June 27, 2006
One- and two-port analog modem WAN interface cards (WICs; part numbers WIC-1AM-V2 and WIC-2AM-V2) are now available for the award-winning Cisco® 1800, 2600XM, 2691, 2800, 3700, and 3800 Series modular router platforms. The new version of these cards expands the already extensive range of WICs currently available for these routers (Figure 1). The interface cards provide cost-effective basic telephone service connectivity to allow remote router management, asynchronous dial-on-demand routing (DDR) and dial backup, dial- and fax-out modem access, and low-density remote-access-server (RAS) services. Combined with the differentiated services delivered through Cisco IOS® Software, the Cisco 1800, 2600XM, 2691, 2800, 3700, and 3800 Series routers offer customers best-of-breed scalability, flexibility, and investment protection-all in cost-effective, multifunctional platforms.
Figure 1. One- and Two-Port Analog Modem WICs for Cisco 1800, 2600XM, 2691, 2800, 3700, and 3800 Series Platforms
Both cards feature dual RJ-11 connectors, which are used for basic telephone service connection. The 2-port card uses one port for connection to a standard telephone line and the other port for connection to a basic analog telephone for use when the modem is idle.
Combined with the Cisco 1800, 2600XM, 2691, 2800, 3700, and 3800, the cards provide:
• An integrated solution for ease of deployment and management
• Enhanced remote management capabilities
• A cost-effective alternative to leased lines or ISDN
• On-demand dial backup for critical WAN links
Equipped with the new integrated analog modem WICs, the Cisco 1800, 2600XM, 2691, 2800, 3700, and 3800 offer the most flexible, scalable, and manageable telephone dial access solution available on the market today.
• Internal analog modem dialup capability-Internal modems allow simple setup of a remote router. There is no separate external power and no cables, and everything is in one chassis.
• Support for speeds up to 56K (V.92 specification)-When dialing out to a digital endpoint, this feature allows users to achieve maximum data transfer rates, equating to faster file transfers, speedier Web access, and faster e-mail downloads.
• Cisco IOS Dial Access Software-Cisco IOS Software provides a broad range of features for remote router management and dial backup, including:
– Reverse Telnet support for LAN-based dial- and fax-out
– Point-to-Point Protocol (PPP), Multilink PPP (MLPPP), and Serial Line Internet Protocol (SLIP)
– TACACS+, RADIUS, and PPP password security
– Autosensing Internetwork Packet Exchange (IPX), Transmission Control Protocol/IP (TCP/IP), AppleTalk Remote Access (ARA), and AppleTalk Control Protocol (ATCP)
Remote Router Management
Figure 2. Remote Router Management
The cards are ideal for dialup access for remote router configuration and management (Figure 2). Similar to connecting a modem to the router auxiliary port, the modem WICs allow out-of-band management through an internal device. Both WICs can receive calls at speeds as fast as 33.6 kbps, depending upon line conditions.
Dial Backup and Asynchronous DDR
Figure 3. Dial Backup and Asynchronous
Constant WAN access is often a requirement for branch offices connecting to a corporate site or the Internet. Although DSL, Frame Relay, ISDN, and leased line are common choices for a primary WAN link, an alternate data path is sometimes needed. The WICs combined with the Cisco 1800, 2600XM, 2691, 2800, 3700, and 3800 offer the ability to automatically dial a backup connection when the primary WAN link is unavailable. In addition, the modem WICs can also be used to provide supplemental bandwidth when the primary WAN link is overused. Multiple modem calls can be aggregated using MLPPP when one 56K connection is insufficient.
For some customers, dialup telephone service connectivity may be the only available choice for WAN access to the Internet or to a corporate home office. For those situations and for those installations that require only a dialup connection, the Cisco routers with the integrated modem WIC offer WAN connectivity through asynchronous DDR. As in the case of dial backup, MLPPP can be used to aggregate multiple dialup connections into one data stream, providing higher throughput.
Dial- and Fax-Out Modem Access
Figure 4. Dial- and Fax-Out Modem Access
The modem WICs comply with RFC 2217 and provide dial- and fax-out modem functions to LAN-connected devices (Figure 4). Using the recommended "Advanced COM Port Redirection" software (available from
http://www.tacticalsoftware.com), customers can take advantage of the modem WICs as if they were connected directly to their PC communications port, allowing convenient access to services such as America Online, CompuServe, and remote fax machines without requiring dedicated phone lines and modems at each PC.
Note: The WICs do not have the ability to receive faxes; only fax-out is supported.
Low-Density Analog RAS Access
Figure 5. Low-Density Analog RAS Access
Dial-in users can take advantage of the ability of the router to function as a small RAS, thus allowing dialup access to the LAN (Figure 5). Typically, a 2-port modem WIC would be used here for maximum port density, but the 1-port WIC is also acceptable. Scalability to multiple modem WICs per chassis (up to 12 in a Cisco 3845-refer to Table 3) is also possible. Dial-in speeds of up to 33.6 kbps (V.34bis) are possible. MLPPP is available to bond two or more calls together, thereby allowing higher-speed RAS support.
A summary of the features and benefits of the integrated modem WICs is provided in Table 1.
Table 1. Integrated V.92 and V.44 Modem WICs Features and Benefits Summary
Auxiliary port compatibility
• Eases deployment and saves space because of its integrated solution
• Provides convenience by replicating all functions of an external modem connected to an auxiliary port
V.92 (up to 56K) and V.44 modem specification support when dialing out to a digital endpoint
Achieves maximum data transfer rates though V.92 or V.44, equating to faster file transfers, speedier Web access, and faster e-mail downloads
Fax-out capability at speeds up to 14.4 kbps
Allows customers to access fax machines and servers from their LAN-connected PCs
Increases connection speeds across modems in the same WIC and across other modem WICs in the same chassis
Full platform support
Modem WIC supported on Cisco 1800, 2600XM, 2691, 2800, 3700, and 3800 routers
Retrofits into existing chassis
Fits into a WIC slot on a Cisco 2600XM, 2691, or 3700 chassis or any compatible network module on a Cisco 2600XM, 2691, or 3700 router (refer to Table 3 for details)
Cisco IOS Software support
Does not require additional memory to support the modem WICs
Up to 24 modems per chassis
No restriction on number of modems available (other than slot availability; refer to Table 3 for details)
Major modem vendor compatibility
Works with AT&T, Hayes, Motorola, Microcom, Multitech, and USR modems (compatibility with other modem vendors is expected, but not confirmed)
Fax vendor compatibility
Works with Panasonic fax machines (compatibility with other fax vendors is expected, but not confirmed)
Current analog and digital modem network module compatibility
Integrates transparently with current analog (NM-8AM-V2 and NM-16AM-V2) and digital modems (NM-xDM)
Worldwide support for country-specific standards
Supports various regulatory requirements; for the latest per-country approval information for the modem WICs, contact your local Cisco Systems® representative
Does not support leased-line mode
Modem firmware upgrade capability
Support modem firmware upgrades
NETWORK MANAGEMENT SUPPORT
One- and two-port analog modem WICs work with the following configuration and network management methods:
• Telnet and console port command-line interface (CLI) configuration
MEMORY AND SOFTWARE REQUIREMENTS
Table 2. Memory and Software Requirements
Minimum Cisco IOS Software Support
Cisco 1800 Series Integrated Services Routers
Cisco 2600XM Multiservice Router
Cisco 2691 Multiservice Platform
Cisco 2800 Series Integrated Services Routers
Cisco 3700 Series Multiservice Access Routers
Cisco 3800 Series Integrated Services Routers
12.3.(16), 12.3(14)T, 12.4(3), 12.4(4)T
12.3(16), 12.3(14)T, 12.4(3), 12.4(4)T
12.3(16), 12.3(14)T, 12.4(3), 12.4(4)T
Note: No additional memory is required to support the modem WICs (refer to the Cisco IOS Software release notes for platform memory requirements per feature set).
MAXIMUM MODEM WAN INTERFACE CARDS PER CHASSIS
Table 3. Maximum Modem WICs per Chassis without Network Module
Maximum Modem WICs per Chassis
4 (Cisco 2801: only 3)
Note: Refer to the platform documents for more details about other hardware restrictions. The Cisco 2600XM, 2600, 2800, 3700, and 3800 also support higher-density modem solutions in a network module form factor. Visit the following URLs for additional information about the 1- and 2-port WICs and the digital modem: