Notes

140

Series Features Overview
Network Modules for Cisco 2600, 3600, and 3700 Series

141

Cisco Voice Network Modules

Product
Description
Supported Platforms
and Minimum Cisco
IOS Versions
Comments

Analog and ISDN Basic Rate Voice Network Modules

NM-HD-1V

One-slot IP Communications
Voice/Fax Network Module
Provides a one-slot
voice/fax network module
with an integrated digital
signal processor (DSP),
enabling voice and fax
trafc to be routed over
data networks The user-
congurable expansion slot
accommodates a Cisco
voice interface card, which
allows four analog ports or
two BRI ports to standard
telephony equipment such
as PBXs, key systems,
phones, and fax machines
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and 2851–
123(8)T4
Requires voice interface
card and voice feature set

NM-HD-2V

Two-slot IP Communications
Voice/Fax Network Module
Provides a two-slot
voice/fax network module
with an integrated digital
signal processor (DSP),
enabling voice and fax
trafc to be routed over
data networks The user-
congurable expansion
slot accommodates two
Cisco voice interface
cards, which allows up
to eight analog ports or
four BRI ports to standard
telephony equipment such
as PBXs, key systems,
phones, and fax machines
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and 2851–
123(8)T4
Requires voice interface
card and voice feature set