This type of card is used to add voice compression channels to the IP500 control unit. Those channels are used for VoIP calls including IP extensions and or IP trunks.
The IP500 VCM card is available in two variants; 32 channels and 64 channels. Each card provides 4 unlicensed VCM channels. Additional channels are enabled through the addition of IP500 VCM licenses.
The IP500 control unit supports up to 128 voice compression channels, using IP500 VCM cards and or IP400 VCM cards on an IP500 carrier card.
Both cards have 4 RJ45 ports for that are used for connections when an IP500 daughter card is fitted.