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Installing Voice Network Modules and Voice Interface Cards
Installing Voice Network Modules and Voice Interface Cards
Voice Network Modules
4 Voice over IP Quick Start Guide
The voice over IP feature for Cisco 3600 series routers uses two types of hardware:
• Voice network modules
• Voice interface cards (VICs)
Note To transmit voice calls over an IP LAN or WAN, you need (in addition to the voice hardware)
at least one other network module or WAN interface card in the router to provide the connection to
the LAN or WAN. In most cases, this network module, or another network module or WAN interface
card in the router, also serves to carry data traffic.
You should install and cable voice modules and VICs before performing the software configuration
tasks explained later. If you need more detailed installation instructions, refer to the Voice
Network Module and Voice Interface Card Configuration Note.
Warning Be sure to observe all warnings and safety precautions in the configuration note.
Caution Network modules and voice interface cards do not support online insertion and removal
(hot swap). To avoid equipment damage, before you insert a network module into a chassis slot, or
insert a voice interface card into a voice network module in the router chassis, you must turn OFF
electrical power and disconnect network cables.
Voice network modules install in a slot in a Cisco 3600 series router, and convert telephone voice
signals into a form that can be transmitted over an IP network. The one-slot voice network module
provides one slot for a voice interface card. The two-slot voice network module provides two slots
for voice interface cards. Figure 2 shows a two-slot voice network module.
Figure 2 Two-Slot Voice Network Module
VOICE
2V
V1
Slots for voice interface cards
V0
EN
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