User guide

APPENDIX F 215
APPENDIX F
Appendix F: Specifications
SPECIFICATIONS
VoIP Features (models with VoIP trunks only)
System
240vs 244vs 280vs 284vs 480vs 484vs
PSTN analog trunks 2 2 2 2 4 4
Analog extensions 4 4 8 8 8 8
VoIP trunks 040404
Maximum extensions*
(analog + IP)
12 12 16 16 16 16
USB interface Standard USB Type B
LAN interface RJ-45 Ethernet (10BaseT)
Memory 30 mins to 150 mins internal*
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)
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.
* requires purchase of License Code
• Embedded SIP server and user agents • G.168 echo cancellation
• Integrated registrar • VAD, silence suppression
• Fax tone detection • Adaptive jitter buffer
• RTP • Packet loss concealment
• G.711µ-law/A-law, G.726 (32 Kbps),
G.729a
• Can use external SIP servers
as required