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Connecting Digital Modem NetworkModules, Digital Network Modem Network Modules Overview

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CH A P T E R 9 Connecting Digital Modem Network Modules This chapter describes how to connect 6-, 12-, 18-, 24-, and 30-port digital modem network modules (NM-6DM, NM-12DM, NM-18DM, NM-24DM, and NM-30DM) for Cisco modular routers and contains the following sections: • Digital Network Modem Network Modules Overview, page 9-1 • Adding 6-Port MICA Modules to a Digital Modem Network Module, page 9-3 • Digital Modem Module LEDs, page 9-11 Tip To determine whether your router supports a specific network module, see Table 1-6 on page 1-16. Digital Network Modem Network Modules Overview These modules (see Figure 9-1) contain 6, 12, 18, 24, or 30 V.34+ digital modems for a direct digital connection to an Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) or Basic Rate Interface (BRI) channel, allowing you to mix digital and analog calls to provide remote access to a LAN. Figure 9-1 Digital Modem Network Module DIGITAL MODEMS MICA BANK 0 MICA BANK 1 MICA BANK 2 MICA BANK 3 MICA BANK 4 EN H10823 Digital modem network modules do not provide network interfaces of their own, but instead handle analog calls passing through other router interfaces. In addition to the digital modem module, the router must contain a PRI or BRI interface to connect to the ISDN channel, and another interface, such as Ethernet, to provide connectivity to the LAN. The PRI or BRI module concurrently handles digital ISDN data connections and remote voice-channel (analog) modem connections, allowing a dynamic mix of digital and modem connections. The digital modem module acts as a pool of available modems that can be used for both incoming and outgoing calls. OL-2485-20 Cisco Network Modules Hardware Installation Guide 9-1

Section	Page
Preface	3
Audience	3
Document Organization	3
Document Conventions	3
Obtaining Documentation	8
Cisco.com	9
Product Documentation DVD	9
Ordering Documentation	9
Documentation Feedback	9
CiscoProduct Security Overview	9
Reporting Security Problems in CiscoProducts	10
Product Alerts and Field Notices	11
Obtaining Technical Assistance	11
CiscoTechnical Support & Documentation Website	11
Submitting a Service Request	12
Definitions of Service Request Severity	12
Obtaining Additional Publications and Information	13
Overview of CiscoNetwork Modules for CiscoAccess Routers	15
Introduction to Cisco Network Module Form Factors	15
CiscoAccess Routers and Cisco Network Modules	17
Network Module Slot Locations and Numbering on Cisco Access Routers	17
Platform and Slot Limitations for Cisco Network Modules	18
Cisco IOS Software Releases and Cisco Network Modules	20
Cisco Interface Cards Supported on Cisco Network Modules	21
Cabling for Cisco Network Modules	23
Platform Support for Cisco Network Modules	29
Related Documents	44
Hardware Documentation	45
Installation Documents	45
Reference Documents	45
Regulatory Compliance and Safety Information Documents	45
CiscoIOS Software Documentation	45
CiscoIOS Software Configuration Documents	46
CiscoIOS Software Reference Documents	46
CiscoIOS Software Release Documents and Tools	46
Where to Go Next	47
Installing CiscoNetwork Modules in CiscoAccess Routers	49
Recommended Practices for CiscoNetwork Modules	49
Safety Recommendations	49
Preventing Electrostatic Discharge Damage	50
General Maintenance Guidelines for Cisco Network Modules	51
Safety Warnings for Cisco Network Modules	51
Installing Cisco Network Modules in Cisco Access Routers	53
Tools and Equipment Required During Cisco Network Module Installation	53
Summary of Installation Tasks	54
Installing and Removing Blank Faceplates	54
Installing Blank Faceplates on Cisco Access Routers	55
Removing Blank Faceplates from Cisco Access Routers	56
Preparing CiscoRouter Slots for Network Module Installation	56
Installing Slot Dividers	58
Removing Slot Dividers	60
Installing Slot Adapters	60
Removing Slot Adapters	62
Installing Single-Wide, Extended Single-Wide, and Extension Voice Network Modules in Cisco Access...	63
Installing Double-Wide and Extended Double-Wide Network Modules in CiscoAccess Routers	64
Removing or Replacing Cisco Network Modules for Cisco Access Routers	66
Removing or Replacing Single-Wide, Extended Single-Wide, and Extension Voice Network Modules from...	67
Removing or Replacing Double-Wide and Extended Double-Wide Network Modules in CiscoAccess Routers	68
Replacing Network Modules in CiscoAccess Routers with Online Insertion and Removal Support	69
Removing or Replacing Application and Service Network Modules	70
Installing Cisco Interface Cards in 1- or 2-Slot Network Modules	72
Installing Other Accessories on Cisco Network Modules	74
Installing and Removing GBICs	74
Where to Go Next	75
Connecting Ethernet, FastEthernet, and Token Ring NetworkModules	77
Ethernet Network Modules	77
1- and 4-Port Ethernet Modules	77
Ethernet 2-WAN Card Slot Modules	78
Ethernet Connectors	79
Connecting Ethernet Ports	79
AUI Connections	79
10BASE-T Connections	80
Ethernet LEDs	81
Fast Ethernet Network Modules	81
1-Port Fast Ethernet Modules	81
Fast Ethernet 2-WAN Card Slot Modules	82
Connecting Fast Ethernet Ports	83
100BASE-T Connections	83
100BASE-FX Connections	84
Fast Ethernet LEDs	86
Token Ring Network Modules	86
Connecting Token Ring Ports	87
Token Ring LEDs	89
Connecting Fast Ethernet-PRI Network Modules	91
1-Port Fast Ethernet and 1- or 2-Port ChannelizedT1/ISDN PRI Network Modules	91
Connecting Fast Ethernet Channelized T1 Modules	92
Fast Ethernet Port	92
PRI Ports	93
1-Port Fast Ethernet and 1- or 2-Port ChannelizedT1/ISDN PRI with CSU NetworkModules	93
Connecting Fast Ethernet Channelized T1 with CSU Modules	94
Fast Ethernet Port	94
CT1/PRI-CSU Port	94
1-Port Fast Ethernet and 1- or 2-Port Channelized E1/ISDN PRI Balanced or Unbalanced NetworkModules	95
Connecting Fast Ethernet Channelized E1 Modules	96
Fast Ethernet Port	96
CE1/PRI-B Port	96
CE1/PRI-U Port	97
Setting Interfaces to Balanced or Unbalanced Termination	97
Configuring Unbalanced Mode	99
Configuring Balanced Mode	100
Fast Ethernet-PRI Module LEDs	101
Connecting Serial NetworkModules	103
About Serial Connections	103
About DTE and DCE Devices	103
About Serial Cables Used with Cisco2600 Series, Cisco3600Series, Cisco3700 Series, and Cisco ...	104
About Data Rates and Distance Limitations	105
Asynchronous and Synchronous Serial Module Data Rates	105
Connecting Asynchronous Network Modules to Asynchronous Devices	106
Octal Cables	106
12-in-1 Smart Serial Cables	106
Asynchronous Network Module Interface Numbering	108
Cisco 3600 Series and Cisco MWR 1941-DC Router 16- and 32-Port Interface Numbering	108
Cisco 2600 Series and Cisco MWR 1941-DC Router Serial Interface Numbering	109
Port Interface Numbering	110
4- and 8-Port	110
16- and 32-Port	110
4-Port Serial Network Module	111
Connecting the 4-Port Serial Module to a Network	111
4-Port Serial Network Module LEDs	112
16- and 32-Port Asynchronous Serial NetworkModules	113
Asynchronous Network Module LEDs	113
4-, 8-, and 16-Port Asynchronous/Synchronous Serial NetworkModules	114
Asynchronous/Synchronous Serial Module LEDs	115
Connecting ISDN BRI Network Modules	119
4- and 8-Port ISDN BRI S/T Network Modules	119
Connecting BRI S/T Modules to a Network	120
BRI S/T Module LEDs	121
4- and 8-Port ISDN BRI U Network Modules	121
Connecting BRI U Modules to a Network	122
BRI U Module LEDs	123
Upgrading ISDN BRI Network Modules	124
Connecting ISDN PRI NetworkModules	125
Channelized T1/E1 PRI Network Modules with G.703	126
Enabling Wetting Current on Channelized T1/E1 PRI Network Modules with G.703	128
Connecting Channelized T1/E1 PRI Network Modules with G.703 to a Network	129
Channelized T1/ISDN PRI NetworkModules	130
Connecting CT1/PRI Modules to the Network	131
Channelized T1/ISDN PRI with CSU Network Modules	131
Connecting CT1/PRI CSU Modules to the Network	132
Channelized E1/ISDN PRI Balanced (120-Ohm) Network Modules	133
CE1/PRI Module Jumper Settings	134
Connecting CE1/PRI-B Modules to the Network	134
Channelized E1/ISDN PRI Unbalanced (75-Ohm) Network Modules	135
CE1/PRI Module Jumper Settings	136
Connecting CE1/PRI-U Modules to the Network	137
PRI Module LEDs	137
Channelized T1/E1 PRI Network Module with G.703 LEDs	138
CT1/PRI Network Module LEDs	139
CT1/PRI CSU Network Module LEDs	139
CE1/PRI Network Module LEDs	140
Online Insertion and Removal with a Cisco PRI Network Module (Cisco3660 and Cisco3745 Only)	141
Upgrading ISDN PRI Network Modules	141
Connecting Voice NetworkModules	143
2- and 4-Channel Voice Network Modules	143
4-, 8-, and 48-Channel High-Density Voice Network Modules	144
60-Channel High-Density Voice Network Module	145
Packet Voice DSP Modules	146
PVDM Orientation	147
Removing PVDMs	148
Installing PVDMs	149
Voice Network Module LEDs	150
HDV Network Module LEDs	150
IP Communications High-Density Digital Voice or Fax Network Module	151
Packet Fax or Voice DSP Modules	152
Configuring E1 Ports for Normal or Wetting Current Mode	154
Installing PVDM2 Modules	155
PVDM2 Module Orientation	155
Removing PVDM2 Modules	156
Installing PVDM2 Modules	157
NM-HDV2 Network Module LEDs	158
Connecting Digital Modem NetworkModules	159
Digital Network Modem Network Modules Overview	159
Hardware and Software Requirements	160
Interface Numbering	160
Adding 6-Port MICA Modules to a Digital Modem NetworkModule	161
Removing the Digital Modem Network Module	163
Removing 6-Port MICA Modules	164
Installing 6-Port MICA Modules	167
Reinstalling the Digital Modem Network Module	168
Digital Modem Module LEDs	169
Connecting Analog Modem Network Modules	171
8- and 16-Port Analog Modem Network Modules	171
Network Protocols Supported	172
8- and 16-Port Analog Modem Network Modules, Version 2	172
Network Protocols Supported	173
Interface Numbering	174
Connecting the Modules to the Telephone Network	175
Analog Modem Network Module LEDs	175
Connecting ATM NetworkModules	177
ATM-25 Network Module	177
Connecting ATM-25 Ports to the Network	178
ATM-25 Network Module LEDs	178
ATM T3 and E3 Network Modules	179
Connecting ATM T3 and E3 Ports to the Network	180
ATM T3 Network Module and ATM E3 Network Module LEDs	180
ATM T3/E3 Network Module LEDs	180
ATM OC-3 Network Modules	181
OC-3 Network Modules for Cisco3600 and Cisco3700 Series Routers	181
ATM OC-3 Network Module LEDs	183
Hardware Compatibility with Cisco 3620 Routers	184
CES Cross-Connection on the Cisco 3660 Router	185
Connecting ATM OC-3 Ports to the Network	185
ATM-OC3-POM Network Module for Cisco3800 Series Routers	186
ATM-OC3-POM Network Module LEDs	187
Connecting ATM-OC3-POM Ports to the Network	187
Laser Safety Guidelines	189
Fiber-Optic Transmission Specifications	190
SONET Distance Limitations	190
Power Budget and Power Margin	191
Link Loss	191
Estimating the Power Margin	192
Single-Mode Transmission	192
Connecting T1/E1 IMA NetworkModules	195
IMA Network Modules	195
Connecting T1/E1 IMA Ports to the Network	197
IMA Network Module Interface Numbering	197
T1/E1 IMA Network Module LEDs	198
Connecting HSSI NetworkModules	199
HSSI Network Modules	199
Connecting HSSI Modules to the Network	199
HSSI Network Module LEDs	201
Connecting Compression NetworkModules	203
Compression Network Modules	203
Interfaces Supported	204
Compression Network Module LEDs	204
Connecting Wireless Multipoint Network Modules	205
Wireless Multipoint Network Modules	205
SubscriberUnit System	206
Hardware and Software Requirements	207
Connecting Wireless Ports to the Network	207
Wireless Multipoint Network Module LEDs	207
Related Documents	208
Subscriber Unit	208
Headend	208
Connecting High-Density Analog Telephony Network Modules	209
High-Density Analog Telephony Network Module	209
Connecting the High-Density Analog Telephony Network Module to the Network	211
Adding DSP Expansion Modules	211
Adding Port Expansion Modules	212
High-Density Analog Telephony Network Module LEDs	214
High-Density Analog Voice Card Pinouts	214
Connecting Ethernet Switch Network Modules	217
Ethernet Switch Network Modules	217
Requirements for Installing Two Ethernet Switch Network Modules in a Single Chassis	218
Power Considerations	218
Restrictions for Cisco 3700 Series Routers	219
Restrictions for Cisco 2600 Series and Cisco 3600 Series Routers	219
Connecting the Ethernet Switch Network Module to the Network	220
Adding an Optional Gigabit Ethernet Expansion Board	221
Adding an Optional Power Board	223
Ethernet Switch Network Module LEDs	226
Connecting Cisco EtherSwitch Service Modules	227
Cisco EtherSwitch Services Modules	227
Cisco EtherSwitch Service Module Overview	228
16-Port Cisco EtherSwitch Service Module	230
23+1-Port Cisco EtherSwitch Service Module	231
24-Port Cisco StackWise EtherSwitch Service Module	231
48-Port Cisco EtherSwitch Service Module	231
Cisco EtherSwitch Service Module Ports	231
Port Types	232
10/100 and 10/100/1000 Ports	232
SFP Modules	233
Port Numbering	234
Cisco EtherSwitch Service Module LEDs	234
EN LED	234
System LED	235
Master LED	235
Port Mode LEDs	236
Port LEDs	237
Port LEDs in Stack Mode	238
Power Considerations	239
Power Considerations for the Router	239
Power Considerations for the Service Module	240
Powering Considerations for a Switch Stack	240
Connecting to the EtherSwitch Service Module Ports	240
Stacking the Cisco EtherSwitch Service Modules	241
Planning the Stack	241
Stack Cabling Considerations	241
Connecting to the Cisco StackWise Ports	243
Connecting Content Engine Network Modules for Caching and Content Delivery	245
CE Network Modules	245
Connecting CE Network Modules to the Network	246
Connecting CE Network Modules with SCSI Controller Expansion Modules to an External Cisco Storage...	247
CE Network Module LEDs	248
Online Insertion and Removal with a CE Network Module	249
Related Documents	251
Hardware Documentation	251
Cisco IOS Software Documentation	251
Content Engine Documentation	251
Cisco Storage Array Documentation	251
Connecting T3/E3 Network Modules	253
1-Port T3/E3 Network Modules	253
Connecting T3/E3 Network Modules to the Network	254
T3/E3 Network Module LEDs	255
Related Documents	255
Cisco IOS Software Documentation	256
Connecting Gigabit Ethernet Network Modules	257
Gigabit Ethernet Network Modules	257
Installing and Removing GBICs	258
Laser Safety Guidelines	259
Connecting Gigabit Ethernet Network Modules to the Network	260
Gigabit Ethernet Network Module LEDs	260
Related Documents	261
CWDM Passive Optical System Documentation	261
Connecting Cisco Intrusion Detection System Network Modules	263
CIDS Network Modules	263
Connecting CIDS Network Modules to the Network	264
CIDS Network Module LEDs	264
Online Insertion and Removal with a CIDS Network Module	265
Related Documents	266
Cisco IDS Software Documentation	267
Connecting Cisco Unity Express Network Modules	269
Cisco Unity Express Network Module Overview	269
Cisco Unity Express Network Module LEDs	270
Online Insertion and Removal with a Cisco Unity Express Network Module	271
Related Documents	273
Cisco Unity Express Software Documentation	273
Connecting Cisco Unity Express Enhanced Network Modules	275
Cisco Unity Express Enhanced Network Modules	275
Shutting Down Cisco Unity Express Enhanced Network Modules	277
Online Insertion and Removal of Cisco Unity Express Enhanced Network Modules	277
Additional References	280
Connecting Cisco Network Analysis Modules	281
Network Analysis Module Overview	281
Connecting Cisco Network Analysis Modules to the Network	282
Online Insertion and Removal with a Cisco Network Analysis Module	283
Related Documents	284
Cisco IOS Software Documentation	284
Connecting NAM Enhanced Network Modules	285
NAM Enhanced Network Modules	285
Shutting Down NAM Enhanced Network Modules	287
Connecting NAM Enhanced Network Modules	287
Online Insertion and Removal of Cisco NAM Enhanced Network Modules Procedure	287
Additional References	289
Connecting Circuit Emulation Over IP Network Modules	291
Cisco CEoIP Network Modules	291
4-Port Serial Interface Network Modules (NM-CEM-4SER)	292
4-Port Serial Interface Network Module (NM-CEM-4SER) LEDs	293
Connecting 4-Port Serial Interface Network Modules to the Network	293
Serial Interface Data Rates and Distance Limitations	294
Using Cisco 12-in-1 Interface Cables with the 4-Port Serial Interface Network Module (NM-CEM-4SER)	295
Using Cisco Extended 12-in-1 Interface Cables with the 4-Port Serial Interface Network Module (NM...	296
4-Port T1/E1 RJ-48 Interface Network Modules (NM-CEM-4TE1)	299
4-Port T1/E1 RJ-48 Interface Network Module (NM-CEM-4TE1) LEDs	299
Connecting 4-Port T1/E1 RJ-48 Interface Network Modules (NM-CEM-4TE1) to the Network	299
Connecting Cisco High-Density Extension Modules	301
CiscoHigh-Density Analog and Digital Extension Module for Voice and Fax	301
Cisco High-Density Extension Module LEDs and Interfaces	302
Expansion Modules for Cisco High-Density Extension Modules	303
Installing Expansion Modules on Cisco High-Density Extension Modules	304
Connecting Cisco High-Density Extension Modules to the Network	306
Establishing Emergency or Power-Fail Connections	309
Cisco High-Density Extension Module Cable Pinouts	309
Connecting Alarm Interface Controller Network Modules	313
Alarm Interface Controller Network Module	313
Connecting the AIC Network Module to the Network	314
AIC Network Module LEDs	320
Connecting AON Network Modules	323
CiscoAON Network Modules	323
Shutting Down the NME-AON-K9=	325
Connecting AON Network Modules	325
Establishing a Gigabit Ethernet Internal Connection	326
Online Insertion and Removal of Cisco Network Modules	326
Related Documents	329
Connecting Cisco Wireless LAN Controller Modules	331
Cisco Wireless LAN Controller Modules	332
Cisco Wireless LAN Controller Module LEDs	332
Connecting Cisco Wireless LAN Controller Modules to the Network	332
Online Insertion and Removal with a Cisco Wireless LAN Controller Module	333
Saving the Configuration File	333
Replacing the Cisco WLAN Controller Module	334
Configuring the Replacement WLAN Controller Module	335
Related Documents	336
Hardware Documentation	337
Cisco IOS Software Documentation	337
Cisco Wireless LAN Controller Module Documentation	337
Connecting Cisco Wireless LAN Controller Enhanced Network Modules	339
CiscoWireless LAN Controller Network Modules	339
Shutting Down the WLAN Controller	341
Establishing a Gigabit Ethernet Internal Connection	341
Online Insertion and Removal of Cisco Network Modules	341
Related Documents	343
Connecting Cisco IP VSAT Satellite WAN NetworkModules	345
Contents	345
Prerequisites for the NM-1VSAT-GILAT Network Module	346
Restrictions for the NM-1VSAT-GILAT Network Module	346
Information About the NM-1VSAT-GILAT Network Module	347
General Satellite Network Components	347
Satellite	349
Hub	349
VSATs	349
NM-1VSAT-GILAT Network Module Connectors	351
Outbound and Inbound Directions in a Satellite Communications Network	351
NM-1VSAT-GILAT Network Module LEDs	351
How to Install, Connect, or Replace the NM-1VSAT-GILAT Network Module	354
Installing the NM-1VSAT-GILAT Network Module in the Router Chassis	354
Connecting the NM-1VSAT-GILAT Network Module to the ODU	354
Prerequisites	355
Steps	355
What to Do Next	356
Connecting the NM-1VSAT-GILAT Network Module to the External PowerSupply	356
Prerequisites	357
Restrictions	357
Steps	357
What to Do Next	358
Replacing the NM-1VSAT-GILAT Network Module in the Router Chassis	358
Performing Online Insertion and Removal of the NM-1VSAT-GILAT Network Module	358
Replacing the NM-1VSAT-GILAT Network Module in a Router	361
Related Documents	363
Connecting Cisco Network Admission Control Network Modules	365
CiscoNAC Network Modules	365
Shutting Down the NAC Network Module	367
Connecting NAC Network Modules	367
Establishing a Gigabit Ethernet Internal Logical Connection	368
Online Insertion and Removal of Cisco NAC Network Modules	368
Related Documents	371
Connecting Application Performance Assurance Enhanced Network Modules	373
Application Performance Assurance Enhanced Network Module	373
Shutting Down and Removing the NME-APA	375
Connecting the Application Performance Assurance Enhanced Network Module	376
Online Insertion and Removal of NME-APA-E3	376
Saving the NME-APA Configuration File	376
Replacing the NME-APA	378
Configuring the Replacement NME-APA	379
Confirming the Startup Configuration (Optional)	380
Related Documents	381
Connecting WAAS Enhanced Network Modules	383
WAAS Enhanced Network Modules	383
Shutting Down WAAS Enhanced Network Modules	386
Connecting WAAS Enhanced Network Modules	386
Establishing a Gigabit Ethernet Internal Connection	386
Online Insertion and Removal of Cisco Network Modules Procedure	388
Additional References	390
Connecting Cisco Unified Messaging Gateway Enhanced Network Modules	391
Cisco Unified Messaging Gateway Enhanced Network Modules	391
Shutting Down Cisco Unified Messaging Gateway Enhanced Network Modules	393
Online Insertion and Removal of Cisco Network Modules Procedure	393
Additional References	395
Connecting 8-Port T1/E1 Network Modules	397
Cisco T1/E1 Network Module	397
Safety Warnings for the Cisco T1/E1 Network Module	397
Cisco T1/E1 Network Module LEDs	398
Connecting a T1/E1 Network Module to a Network	399
Connecting Cisco Analog Video Gateway NetworkModules	401
Contents	401
Information About the EVM-IPVS-16A Network Module	402
Video Ports	402
RS-485 Serial Communication Interfaces	402
Alarm Inputs and Control Relay Outputs	403
Gigabit Ethernet Port	403
EVM-IPVS-16A Network Module Connectors	404
EVM-IPVS-16A Network Module LEDs	404
How to Install, Connect, or Replace the EVM-IPVS-16A Network Module	405
Installing the EVM-IPVS-16A Network Module in the Router Chassis	406
Wiring the Terminal Block Connectors	406
Connecting the EVM-IPVS-16A Network Module to the Network	407
Prerequisites	407
Steps	408
What to Do Next	409
Performing Online Insertion and Removal of the EVM-IPVS-16A Network Module	409
Restrictions	410
Steps	410
Related Documents	412
Cisco Video Management and Storage System Enhanced Network Modules	413
Cisco Video Management and Storage System Enhanced Network Modules	413
Shutting Down Cisco Video Management and Storage System Enhanced Network Modules	415
Connecting Cisco Video Management and Storage System Network Modules	415
Connecting to an External Storage Device using iSCSI	415
Establishing a Gigabit Ethernet Internal Connection	416
Online Insertion and Removal of Cisco Network Modules Procedure	416

Match case Limit results 1 per page

CHAPTER

9-1

Cisco Network Modules Hardware Installation Guide

OL-2485-20

Connecting Digital Modem Network Modules

This chapter describes how to connect 6-, 12-, 18-, 24-, and 30-port digital modem network modules

(NM-6DM, NM-12DM, NM-18DM, NM-24DM, and NM-30DM) for Cisco modular routers and

contains the following sections:

•

Digital Network Modem Network Modules Overview, page 9-1

•

Adding 6-Port MICA Modules to a Digital Modem Network Module, page 9-3

•

Digital Modem Module LEDs, page 9-11

Tip

To determine whether your router supports a specific network module, see

Table 1-6 on page 1-16

Digital Network Modem Network Modules Overview

These modules (see

Figure 9-1

) contain 6, 12, 18, 24, or 30 V.34+ digital modems for a direct digital

connection to an Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) or Basic Rate

Interface (BRI) channel, allowing you to mix digital and analog calls to provide remote access to a LAN.

Figure 9-1

Digital Modem Network Module

Digital modem network modules do not provide network interfaces of their own, but instead handle

analog calls passing through other router interfaces. In addition to the digital modem module, the router

must contain a PRI or BRI interface to connect to the ISDN channel, and another interface, such as

Ethernet, to provide connectivity to the LAN. The PRI or BRI module concurrently handles digital ISDN

data connections and remote voice-channel (analog) modem connections, allowing a dynamic mix of

digital and modem connections. The digital modem module acts as a pool of available modems that can

be used for both incoming and outgoing calls.

H10823

DIGITAL MODEMS

MICA

BANK 0

MICA

BANK 1

MICA

BANK 2

MICA

BANK 3

MICA

BANK 4

Cisco 3825 Hardware Installation Guide - Page 159

Connecting Digital Modem NetworkModules, Digital Network Modem Network Modules Overview

Page 159 highlights

Connecting Digital Modem NetworkModules, Digital Network Modem Network Modules Overview