Cisco Systems NM12DM, NM24DM, MICA-6MOD, NM18DM, MMTL-3600 User Manual

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Digital Modem Network Modules for the Cisco 3600 Platform

OVERVIEW

Introduction

The Cisco 3600 Series is a family of modular, multifunction access routers for medium and large-sized ofﬁces and smaller Internet ServiceProviders.Withover70modular interface options, theCisco 3600 family provides solutions for voice/data integration, virtual privatenetworks(VPNs) dial access, andmultiprotocol data routing. Using Cisco’s Voice/Fax network modules, the Cisco 3600 Series allows customers to consolidate voice, fax, and data trafﬁc on a single network infrastructure. The high-performance, modular architecture of the Cisco 3600 Seriesprotects customers’ investment innetwork technology and integrates the functionsof severaldevices into a single, manageable solution.

Now, with this announcement of the new digital modem networkmodules, the Cisco 3600expandsits role as amultifunction, branch/enterprise orientated platform that, supports voice over data, dial access and LAN-to-LAN or routing in one modular platform, making it an ideal solution for the “power branch” environment.

The following network modules are being announced:

Table 1

Product Product Description

NM-6DM 6 digital modem network module NM-12DM 12 digital modem network module NM-18DM 18 digital modem network module NM-24DM 24 digital modem network module NM-30DM 30 digital modem network module MICA-6MOD 6 digital modem upgrade card for the Cisco 3600 digital

MMTL-3600 Managed Modem Software License (available in blocks

modem network modules

of 6 modems)

1. Note: These digital modem network modules must operate in conjunction with a TI/EI/PRI/BRI network module. For details on supported PRI network modules, see the “Technical Speciﬁcations” section.

Features at a Glance

• Up to 30 digital modems per 3620

• Up to 60 digital modems per 3640

• Up to 120 digital modems in a 3660

• Network module requires one slot in a Cisco 3600

• Each network module supports up to 30 digital modems

• Each modem is fully software upgradable

• Speeds up to 56 kbps (V.90) are supported

• The number of modems per chassis can be easily increased on site

• LEDs indicate when the networkmodule is enabled/modem banks are in use

• PRI, BRI, CT1, and R2 support

• V.110 support

• Dial-out and Fax-out capable

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Digital Modem Features/Benefits

The Cisco 3600, installed with the digital modem network modules, offers the most ﬂexible, scalable, manageable, and high-performance dial accesssolution available in themarket today.

These new network modules utilize either the single or dual PRI network module, the 4 and 8 port BRI Network Modules, or the mixed media Fast Ethernet/PRI network module to offer support for up to 90 remote modem users (using two digital network modules), at speeds up to 56 kbps. Each network module supports up to 30 digital modems. Flexible LAN topologies including Ethernet, Fast Ethernet, and Token Ring are supported.

Theinternal digital modem network moduleisavailablewith 6, 12, 18, 24, and 30 modems preinstalled, and can also be upgraded on site, from say 18 to 24 modems, as simply as upgrading computer memory! This scenario gives the maximum ﬂexibility to grow a dial-in solution as the remote user base grows.

Support for the new 56K modem technology allows users to achievemaximum data transfer rates, while still allowing support for V.34technologies. The modems are software upgradable, and will support future standards as they become available. This high speed ensures the fastest downloads of Web pages and ﬁles.

Note: Actual speeds vary,dependingon line conditions. Because of FCC limitations, speeds in the United States are less than 56 kbps.

The Cisco 3600 can take incoming Integrated Services Digital Network (ISDN) or voice calls and automatically switch them to the appropriate internal circuitry.ThePRI/BRI switching is based on Q.931 messaging in the ISDN D channel. This out-of-band signaling channel provides a way for the telephone network to label each call as to the type of call. Speciﬁcally, when an incoming call is labeled “voice” by the telephone network, the Cisco 3600 directs it to one of its modems. When a call is labeled “ISDN data”, it is directed to one of its High-Level Data Link Control (HDLC) controllers. The beneﬁts here are one phone number for modem and ISDN users. R2 and CT1 interfaces also support this switching ability.

The Cisco 3600 provides complete centrally managed modem capabilities, key requirements for branches and enterprises building midsized dial-in pools. The Cisco 3600 modems can be managed via the same Simple Network Management Protocol (SNMP)-based tools used to manage the rest of the network, providing network managers with one solution at a central management point. Optional enhanced modem management (Management Modem Technology License [MMTL])capabilities allow for the gathering ofmodemstatistics, real-time call-in-progress, monitoring modem activity log, modem hard/soft busy out, and the ability to accomplish modem ﬁrmware upgrades.

The installed modems can be utilized by LAN users for dial-out and fax-out applications, utilizing 3rd party applications such as the one available from Tactical Software. The modems can be assigned as dial-in, dial-out, or both. Dial-out support allows the LAN users to utilize the modems during the day for outgoing calls, and use the same modems in the evening for incoming calls from home users.

The ever-expanding numbers of remote users can be easily accommodated with the support for Multilink Multichassis PPP, allowing dial-in pools of lines to span numerous Cisco 3600 routers. Through the use of Layer2 Forwarding (L2F) technology and Cisco’s exclusive Stack Group Bidding Protocol (SGBP), the Cisco 3600 can growtomeet the requirementsof the fast-growing and frequently changing dial environments. Since the essential building block is a relatively small investment, enterprises and branch ofﬁces can scale from very small to larger installations.

TheCisco IOS

softwarecan help maximize dialbandwidth, utilizing numerous features such as bandwidth on demand and protocol spooﬁng. These software features directly reduce line usage and reduce the cost associated with a remote access solution.

Lower operating costs are achievable with the Cisco 3600’s set of central management. The Cisco 3600 and its internal modems can be managed with CiscoWorks software. In addition, Cisco’s conﬁguration management capabilities provide network managers with complete control over network statistics and the ability to conﬁgure and tune network operations from a central location. Finally, comprehensive debugging tools in Cisco IOS software substantially reduce the time and cost associated with problem isolation and correction.

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Utilizing TACACS+, Challenge Handshake Authentication Protocol/Password Authentication Protocol (CHAP/PAP), 56-bit Data Encryption Standard (DES) encryption andthe built-in ﬁrewall capabilities of the Cisco 3600 allowssecure access for remote users to sensitive company data.

Life Cycle-Focused Support Solutions

Cisco’s comprehensive support portfolio delivers solutions that enhance the network throughout its life cycle. From design and installation,to preventiveandscheduledmaintenance, to performance optimization, Cisco’s solutions promote network reliability, eff iciency,and fle xibility. Designed to function as an integral product component, these programs deliver seamless support. Together, they proactively help organizations sharpen their competitive edge. Through access to the Cisco Connection Online (CCO) W eb site, customers can both use and market expanded functionality and new featuresas soon as they become available.Moreover, accesstoCisco’s technical expertise is availablearound the clockand around the globe. This virtual team of the world’s top networking engineers is equipped to address every need from troubleshooting to network design and planning.

Digital Modem Applications

Historically, branch ofﬁce connectivity has been synonymous with connecting the localLAN to a regional or central site. Withthe rapid growth in mobile computing and telecommuting, more and more branch ofﬁces need to add user-to-LAN capabilities.

Using ISDN PRI, ISDN BRI or Fast Ethernet/ISDN PRI, and digital modem network modules, the Cisco 3600 provides the ideal functionality for the branch and enterprise ofﬁces.

Figure 1 illustrates a typical application for the ISDN PRI and digital modem network modules.

For basic telephone users, both 33.6K and 56K modem calls can be terminated through a PRI/BRI connection into a digital modem network module, including mobile workers and people working from hotel rooms. For teleworkers with access to Basic Rate Interface (BRI), the same phone number could be used to connectto the same Cisco3600, achieving 64 kbps non-compressed, or with multilink PPP, 128 kbps.

Multiple backhaul options are available to link back to a corporate network, at speeds up to 8 Mbps. Additionally, a slower speed (T1 or Frame Relay, for example) connection could link the branch to the World Wide Web.

Figure 1

Telecommuter

*PRI only

ISDN BRI*

Modem

• Bulletin Board

• Internet

PRI, BRI,

CT1, or R2

Cisco 3600

Dial-Out

Frame Relay

X.25

Leased Line

Backhaul

Branch Office

Features:

• Up to 30 digital modems in a Cisco 3620

• Up to 60 digital modems in a Cisco 3640

• Remote user applications

• PRI, BRI, CT1, and R2 support

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Orderability, Availability, Software Requirements, Memory Requirements

Product Orderable Available

NM-6DM October 1997 October 1997 11.2 (9) XA NM-12DM October 1997 October 1997 11.2 (9) XA NM-18DM October 1997 October 1997 11.2 (9) XA NM-24DM October 1997 October 1997 11.2 (9) XA NM-30DM October 1997 October 1997 11.2 (9) XA MICA-6MOD October 1997 October 1997 11.2 (9) XA

Orderability, Availability, Software Requirements, Memory Requirements

Version

Minimum Cisco IOS

Product Orderable Available

MMTL-3600 October 1997 October 1997 11.2 (9) XA

Memory requirements for the each digital modem network module include:

• 300 KB main memory

• 200 KB input/output (I/O) memory

Ordering Information

Product Number Product Description

MMTL-3600 Managed Modem Software License (per 6 modems)

digital modem network modules

• Bell 103 at 300 bps

• ITU V.21 at 300 bps

• ITU V.22 at 1200 bps

• Bell 212A at 1200 bps

• ITU V.22bis at 2400 bps

• ITU V.32 up to 9600 bps

• ITU V.32bis up to 14,400 bps

• V.32 turbo up to 19,200 bps

• V.34 up to 33,600 bps

Error correcting link access protocols:

V.42 LAPM, MNP 2-4

Compression protocols:

Version

V.42bis (includes MNP-5)

Supported Configurations

• Cisco 3620—one digital modem network module

• Cisco 3640—two digital modem network modules

Upgradability:

Software upgradable to future modem and fax standards.

• Cisco 3660--four digital modem network modules

Technical Specifications

Physical Characteristics

• Six modems per modem module

• Up to ﬁve modem modules per network module

Modem Protocols Supported

Carrier protocols:

• V.90 (requires Portware 2.5.1.0 and IOS 11.(2)16P or IOS 11.3.(6)T or higher.)

• K56Flex

• V.110 support

• ITU V.23 at 75/1200 bps

Modem Management (optional)

This option provides for modem statistics, real-time call-in-progress, monitoring modem activity log, and modem hard/ soft busy out. For further details, reference the digital modem management document support.

Requirements

Operates in conjunction with the following network modules, operating in PRI, BRI (requires IOS 12.0(2)XC or higher), R2 (requires IOS 12.0(1)T or higher) and CT1 mode:

• NM-1CT1

• NM-1CT1-CSU

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• NM-2CT1

• NM-2CT1-CSU

• NM-1CE1B

• NM-1CE1U

• NM-2CE1B

• NM-2CE1U

• NM-4B-S/T or U

• NM-8B-S/T or U

• NM-1FE1CT1

• NM-1FE1CT1-CSU

• NM-1FE2CT1

• NM-1FE2CT1-CSU

• NM-1FE1CE1B

• NM-1FE1CE1U

• NM-1FE2CE1B

• NM-1FE2CE1U

Positioning

The Cisco 3600 expands the Cisco dial product line, now with products from the Cisco 2509-12 series, through the Cisco 3600 series, to the Cisco 5X00 series, making up a broad range of dial solutions targeted at different market segments, including small branch, enterprise, ISPs, telcos, and carriers.

Other dial-focused network modules of the Cisco 3600 include 16 and 32 port high-density async network modules, ISDN network modules, eight and 16 port analog modem network. These modules address the high-density async market (up to 192 async ports) for external modems banks and terminal

servers,the ISDN consolidation market (eight PRI or48 BRI), the mid-density analog modem market, and the mid-density hybrid market (30-120 digital modems), all utilizing a high-performance routing engine.

Summary

The Cisco 3600 is a multifunction platform, with the ability to support dial access, LAN-to-LAN routing, and multiservice functions in the same chassis. The beneﬁts of this multifunction positioning include modularity, scalability, inv estment protection, and flexibility .The Cisco 36000 multifunction platform is the Swiss army knife of routers, directly addressing the many varied needs of the power branch environment.

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