User guide

APPENDIX F 207
VoIP features (models with VoIP trunks only)
• Embedded SIP server and user agents
• Integrated registrar
• Can use external SIP servers as required
•RTP
• G.711µ-law/A-law, G.726 (32 Kbps), G.729a
• G.168 echo cancellation
• VAD, silence suppression
• Adaptive jitter buffer
• Packet loss concealment
•Fax tone detection
System 24-CA 48-CA 48-CVA
Analog trunks 2 4 4
VoIP trunks 0 0 4
Analog extension interfaces 4 8 8
LAN interface 0 RJ-45 Ethernet
USB interface 1 1 1
Serial interface (RS-232, 9-pin) 1 1 1
Memory expansion 1, 3, 4.5 and 9 hour memory cards
Music input Phono jack (1/8" mono) or stored .wav file
PA output Phono jack (1/8" mono) or stored .wav file
Power source 120 VAC, 60 Hz — In/16 VAC, 1.5 A — Out
Power-failure line to
extension jacks
Extension 4 connects to Line 1
APPENDIX F
APPENDIX F: SPECIFICATIONS
SPECIFICATIONS