Analog / Hybrid PBX Integration Requirements

To connect to an existing house analog PBX or the PSTN using a Grandstream 4104

1. Caller id supplied by PBX in one of the following formats:
   1. Bellcore/Telcordia
   2. ETSI-FSK during ringing
   3. ETSI-FSK prior to ringing with DTAS
   4. ETSI-FSK prior to ringing with LR
   5. ETSI-FSK prior to ringing with RP
   6. ETSI-DTMF during ringing
   7. ETSI-DTMF prior to ringing with DTAS
   8. ETSI-DTMF prior to ringing with LR
   9. ETSI-DTMF prior to ringing with RP
   10. SIN 227 – BT
   11. NTT – Japan
2. Polarity Reversal or Current Disconnect for hangup detect.
3. Answer Supervision.
4. Call Progress Tones – f1,f2,c for each of the following tones:
   1. Dial Tone
   2. Ringback Tone
   3. Busy Tone
   4. Reorder Tone

Note: If these requirements cannot be met, the system will operate but with reduced functionality.

VoIP PBX Integration Requirements

To connect to an existing house VoIP PBX.

1. Signal Protocol: SIP
2. Authentication Mode: Digest
3. CallerID Transport Type: Relay via SIP From (If using default security)
4. DTMF: SIP INFO or RFC2833
5. Codec: G.711 (µLaw or ALaw) or G.722 (not the same codec as G.722.1 or G.722.2)
6. Audio Packet Size: 20ms
7. NAT/STUN: not supported
8. RTCP: not supported
9. SRTP: not supported