... (Message Waiting Indication) RFC3842Presence/IM (RFC2778, 3858, 3863, 4480)Audio Codec:[TransCoding] G.729A,GSM, Speex, G.711U, G.711A; ... outer telecom connectionSupport connection to SIP virtual operator system via SIP Trunk Support calling outboundSupport calling inbound. Permit multi ... assigned by ITSP.Support outbound calling and inbound calling via FXO portSupport ENUM Trunk(optional)4 Set up ...