• Specification
Port: 24FE+24POTS
Operation wavelength: 1310nm downstream/1490nm upstream
Max. transmission distance is 20km
Supports SIP, H248, MGCP and RTCP
Registration and authentication: call authentication, heartbeat, primary and secondary servers, and Outbound
Gain control, IP dialing rule, and digit relay
Voice codec negotiation: support G.711U, G.711A, G.729a, G.729b, G.723.1_5.3, G.723.1_6.3, G.726-32, and G.726-40
Call progress tone generation, echo cancellation, packet loss concealment (PLC), voice activity detection (VAD), comfort noise generator (CNG), and ptime configuration
Supplementary services: call forwarding, do not disturb, anonymous calls rejection, call waiting, 3 way conferencing, call return, call transfer, hot-line, emergency call, caller line identity restriction, message waiting indication, interception of call, 
outgoing call restrict, alarm-call service, abbreviated dialing
Fax service: T.38 fax, G.711 fax, and modem pass-through
@ 2012 Gongjin Electronics