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Cisco PVDM PVDM/4 - Voice DSP module - 4 ports
Cisco Systems presents its new voice network module. Voice network modules convert telephone voice signals into a form that can be transmitted over an IP network. You need both a voice network module and a voice interface card for a voice connection. You can install one voice interface card in a 2-channel voice network module, and two voice interface cards in a 4-channel module.
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