C H A P T E R
16-1
Cisco Network Modules Hardware Installation Guide
OL-2485-20
16
Connecting
High-Density Analog Telephony
Network Modules
This chapter describes how to connect high-density analog telephony network modules for Cisco
modular routers. It contains the following sections:
•
High-Density Analog Telephony Network Module, page 16-1
•
Connecting the High-Density Analog Telephony Network Module to the Network, page 16-3
•
Adding DSP Expansion Modules, page 16-3
•
Adding Port Expansion Modules, page 16-4
•
High-Density Analog Telephony Network Module LEDs, page 16-6
•
High-Density Analog Voice Card Pinouts, page 16-6
Tip
To determine whether your router supports a specific network module, see
Table 1-6 on page 1-16
.
High-Density Analog Telephony Network Module
The high-density analog telephony network module is a modular, high-density voice network module
that provides dual tone multifrequency (DTMF) detection, voice compression and decompression, call
progress tone generation, voice activity detection (VAD), echo cancellation, and adaptive jitter
buffering.
The high-density analog telephony network module supports two different expansion modules,
providing up to 12 ports in addition to the 4 Foreign Exchange Service (FXS) ports on the base
high-density analog telephony network module (NM-HDA). See
Table 16-1
for expansion module
support information.
Table 16-1 Expansion Modules Supported on the Cisco High-Density Analog Telephony Network
Module (NM-HDA)
Expansion Modules
Port Type
Number of Ports
EM-HDA-8FXS
FXS
8
EM3-HDA-8FXS
FXS
8
EM-HDA-4FXO
FXO
4
EM2-HDA-4FXO
FXO
1
4