vi
5. SIP Settings......................................................... 84
6. NAT Transversal.................................................. 86
7. Administrator ....................................................... 86
5. APPLICATION EXAMPLE............................................. 87
5.1. PSTN CALLING......................................................... 88
5.2. SIP-TO-SIP CALLING ................................................ 89
5.3. SIP-TO-PSTN CALLING............................................. 91
5.4. PSTN-TO-SIP CALLING............................................. 93
5.5. 3-WAY CONFERENCE CALLING................................... 95
5.6. DIRECT IP TO DIRECT IP CALLING .............................. 97
5.7. FREEWORLD DIALUP (FWD) ..................................... 98
SIP Settings ................................................................... 99
Codec Setting .............................................................. 100
6. SPECIFICATION.......................................................... 101
7. TROUBLE SHOOTING ............................................... 103
7.1. DO NOT HEAR DIAL TONE?........................................ 103
7.2. CAN NOT ACCESS WEB PAGE?.................................. 103