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Voice interface card - plug-in module - 6 digital port(s) - refurbished
Coding and voice compression methods are the first factors that could potentially affect voice quality. When dealing with voice compression, a trade-off occurs between the level of voice quality delivered and the amount of bandwidth savings achieved. Through the use of voice compression and, therefore, the optimization of bandwidth, significant cost savings are possible. Cisco offers VCM6 voice compression module providing voice compression according to the voice compression coding algorithm (codec) specified when the Cisco MC3810 is configured. It supports G.711, G.723, G.726, G.728, G.729, G.729 Annex A and Annex B, fax relay codecs.
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