0 items ($0.00) These are used to provide voice compression channels for calls between IP and non- IP devices, devices being both trunks and extensions. VCM cards with differing numbers of voice compression channels are available
The Voice Compression Module (VCM) is used for Voice over IP (VoIP) applications in the IP403, IP406 and IP412 control units. Five VCM variants are available supporting 4, 8, 16, 24 and 30 channels of compression. On IP Office Small Office Edition systems, either 3 or 16 VCM/VoIP channels are pre-built. The IP403, IP406 supports a single VCM while the IP412 can have any two VCMs installed. The echo cancellation capabilities of the VCM's vary. The VCM 4, 8, 16 and 24 offer 64ms of echo cancellation. while the VCM 30 offers 25ms.
VCM5, VCM10, VCM20 - These VCM cards have been superseded by the VCM4, VCM8 and VCM16 versions. Though the new cards have a lower channel capacity, they support echo-cancellation of 64ms rather than the formers 25ms.
