Cisco 3825 Hardware Installation Guide - Page 209

16 C H A P T E R 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 EM-HDA-8FXS EM3-HDA-8FXS EM-HDA-4FXO EM2-HDA-4FXO Port Type FXS FXS FXO FXO1 Number of Ports 8 8 4 4 OL-2485-20 Cisco Network Modules Hardware Installation Guide 16-1