Provides voice compression channels used for VoIP calls.
For IP Office 5.0 and lower provides 4 initial channels with additional channels up to 32 being enabled by licenses.
For IP Office 6.0 and higher provides all 32 VCM channels with 12 IP Telephony endpoints active. Additional IP telephones can be added via license activation.
Can be fitted with an optional IP500 trunk interface card that uses these ports for trunk connections (IP500 Analog Trunk 4, IP500 Universal PRI 1, IP500 Universal PRI 2).
A maximum of 2 per IP500 control unit; 148 channel maximum using IP500 and or IP400 VCM cards