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

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

OVERVIEW

Digital Modem Network Modules for the Cisco 3600 Platform

Introduction

The Cisco 3600 Series is a family of modular, multifunction access routers for medium and large-sized ofﬁces and smaller Internet Service Providers. With over 70 modular interface options, the Cisco 3600 family provides solutions for voice/data integration, virtual private networks (VPNs) dial access, and multiprotocol 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 Series protects customers’ investment in network technology and integrates the functions of several devices into a single, manageable solution.

Now, with this announcement of the new digital modem network modules, the Cisco 3600 expands its role as a multifunction, 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 Description1
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
	modem network modules

MMTL-3600	Managed Modem Software License (available in blocks
	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 network module 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 access solution available in the market 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.

The internal digital modem network module is available with 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 achieve maximum data transfer rates, while still allowing support for V.34 technologies. 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, depending on 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. The PRI/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 of modem statistics, 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 Layer 2 Forwarding (L2F) technology and Cisco’s exclusive Stack Group Bidding Protocol (SGBP), the Cisco 3600 can grow to meet the requirements of 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.

The Cisco IOS® software can help maximize dial bandwidth, 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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