Cisco 2600 Series Operation Manual page 100

2-Channel and 4-Channel Voice Network Modules
Figure 9-1
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Figure 9-2
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Voice network modules convert telephone voice signals into a form that can be transmitted
over an IP network, and have no connectors. The voice network module (2-channel or
4-channel) determines the number of voice connections you can make through voice
interface cards. Voice interface cards provide the connection to the telephone equipment or
network. (See the Cisco WAN Interface Cards Hardware Installation Guide.)
9-2 Cisco Network Modules Hardware Installation Guide
2-Channel Voice Network Module
4-Channel Voice Network Module
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