MGCP G.723/ G.729A/ DTMF POTS ASM RTP T.38 End Termin a l FAX TCP/ IP or UDP/ IP MGCP/ SIP V.92/ V.90 PPP V.92/V.90 3 1 or PSTN or ADSL Data PC Central Site Multimedia Server P PP ADSL Voice/Fax/Data End Termina l 4 PSTN POTS G.723 or G.729A ASM RTP TCP/ IP MGCP/ SIP Fax Modulation 5 PSTN FAX Servi c e G.723/ G.729A/ DTMF POTS UDP/ IP T.38 © 2001 VOCAL Technologies Ltd. TCP/ IP ASM/RTP V.34 FAX V.17 V.29 V.27ter V.21 ch2 2 T.38 End Termin a l FAX Video MGCP/SIP or UDP/ IP H.263 Multimedia End Terminal http://www.vocal.com or 1. Voice/Fax End Terminal - PSTN Interface 2. Multimedia End Terminal - Internet Interface 3. Dial-Up Network Server 4. Dial-Up POTS Gateway 5. Dial-Up T.38 Gateway I N T E R N E T