7270 E1 4P VOICEBAND SERVICES CARD (VSC) The Voiceband Services Card (VSC) terminates TDM channels at its E1 ports, and provides features including speech compression, silence removal, and fax demodulation to adapt these TDM channels to transport over an

7270 E1 4P VOICEBAND SERVICES CARD (VSC) The Voiceband Services Card (VSC) terminates TDM channels at its E1 ports, and provides features including speech compression, silence removal, and fax demodulation to adapt these TDM channels to transport over an ATM network. The VSC requires a minimum of one (typical applications require three) and a maximum of four DSP1 transport modules per 90-4654-02. Fits 7270. Requires I/O card per 90-4461-02, -03, or –04.