Cisco 3825 Hardware Installation Guide - Page 143
Connecting Voice NetworkModules, 2- and 4-Channel Voice Network Modules - voip
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CH A P T E R 8 Connecting Voice Network Modules The voice functionality built into Cisco IOS software enables modular access routers to carry voice traffic, such as telephone calls and faxes, as Voice over IP (VoIP) simultaneously with data traffic over LANs, MANs, and WANs. Voice network modules convert telephone voice signals into a form that can be transmitted over an IP network. Voice network modules convert telephone voice signals into a form that can be transmitted over an IP network. These modules have one or two slots for installing supported interface cards (see Table 1-1 on page 1-5 and Table 1-2 on page 1-8). Voice interface cards (VICs) or voice/WAN interface cards (VWICs) installed in the voice network module provide physical connections to the telephony equipment or network, and are connected using the appropriate cables. See the Cisco Interface Cards Hardware Installation Guide for more information. You can install one voice interface card in a 1-slot voice network module, and two voice interface cards in a 2-slot module. For information on installing voice interface cards into a network module, see the "Installing Cisco Interface Cards in 1- or 2-Slot Network Modules" section on page 2-24. This chapter contains the following sections: • 2- and 4-Channel Voice Network Modules, page 8-1 • 4-, 8-, and 48-Channel High-Density Voice Network Modules, page 8-2 • 60-Channel High-Density Voice Network Module, page 8-3 • Voice Network Module LEDs, page 8-8 • IP Communications High-Density Digital Voice or Fax Network Module, page 8-9 Tip To determine whether your router supports a specific network module, see Table 1-6 on page 1-16. 2- and 4-Channel Voice Network Modules This section describes the following modules: • 1-slot 2-channel voice network module (NM-1V) (see Figure 8-1) • 2-slot 4-channel voice network module (NM-2V) (see Figure 8-2) For information on the Cisco interface cards supported on these voice network modules, see Table 1-2 on page 1-8. OL-2485-20 Cisco Network Modules Hardware Installation Guide 8-1