... services capability of industrial standard SIP protocol. Flexible configuration of one to four E1 / T1Guarantee 4E1 120 DS0 voice processing ... GSM,iLBC,T.38)Ideal PSTN termination for IP phones, VoIP gateway, IPPBX, PBX accessEmbeded with RTP voice proxy, Digits translationAuto ... . WSS100-TG configured with one to four T1/E1 interfaces can maximally process 120 simultaneous VoIP calls. WSS100-TG embeds ...