Hi All, I am trying to get multicast paging to work with the default configuration in FreeSwitch. I am using 239.192.0.2 multicast IP Adress on port 8000. I have configured a phone with that multicast address and phone, however when I try to page, I just get dead air. I see some ZRTP negotiation failures in Freeswitch logs. Can someone tell me what could be wrong 479243ec-a237-481b-a94d-af6707cf2b07 2016-01-15 18:24:22.421859 [DEBUG] sofia.c:6614 Channel sofia/internal/1002@172.18.18.237 entering state [ready][200] 2016-01-15 18:24:22.481945 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21355 size=144. Stream 2:CLEAR:START 479243ec-a237-481b-a94d-af6707cf2b07 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:5856 Correct ip/port confirmed. 479243ec-a237-481b-a94d-af6707cf2b07 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:3548 Starting timer [soft] 160 bytes per 20ms 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: START SESSION INITIALIZATION. sID=3. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: ZID=616331323132656430393363. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: Loading User's profile: 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: allowclear: OFF 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: autosecure: ON 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: disclose_bit: OFF 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: signal. role: Unknown 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: TTL: 4294967295 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: SAS schemes: 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 B256 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 B32 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: Ciphers: 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 AES3 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 AES1 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: PK schemes: 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 EC25 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 DH3k 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 DH2k 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 Mult 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: ATL: 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 HS32 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: Hashes: 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 S256 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: Session initialization - DONE. sID=3. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: ATTACH NEW STREAM to sID=3: 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp]: Stream ID=0 UNKNOWN switching <NONE> ---> <ACTIVE>. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: Empty slot was found - initializing new stream with ID=3. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: Preparing ZRTP Hello according to the Session profile. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp main]: ATTACH NEW STREAM - DONE. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp engine]: START STREAM ID=3 mode=CLEAR state=ACTIVE. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp]: Stream ID=3 CLEAR switching <ACTIVE> ---> <START>. 2016-01-15 18:24:22.642176 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63956 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:22.702262 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63957 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:22.722291 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21356 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:22.802406 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63958 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:22.922579 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21357 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:23.002694 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63959 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:23.122867 [DEBUG] switch_rtp.c:1357 [ zrtp engine]: WARNING! HELLO have been resent 5 times without a response. Raising ZRTP_EVENT_NO_ZRTP_QUICK event. ID=2 2016-01-15 18:24:23.122867 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21358 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:23.202982 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63960 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:23.323155 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21359 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:23.403270 [DEBUG] switch_rtp.c:1357 [ zrtp engine]: WARNING! HELLO have been resent 5 times without a response. Raising ZRTP_EVENT_NO_ZRTP_QUICK event. ID=3 2016-01-15 18:24:23.403270 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63961 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:23.523443 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21360 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:23.603558 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63962 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:23.723731 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21361 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:23.803846 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63963 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:23.924019 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21362 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:24.004134 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63964 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:24.124307 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21363 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:24.204422 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63965 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:24.314580 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21364 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:24.394696 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63966 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:24.514868 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21365 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:24.594984 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63967 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:24.715156 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21366 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:24.795272 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63968 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:24.915444 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21367 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:24.995560 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63969 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:25.115732 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21368 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:25.195848 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63970 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:25.316020 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21369 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:25.396136 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63971 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:25.516308 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21370 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:25.596424 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63972 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:25.716596 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21371 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:25.796712 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63973 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:25.916884 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503275614 seq=21372 size=144. Stream 2:CLEAR:START 2016-01-15 18:24:25.997000 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63974 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:26.117172 [DEBUG] switch_rtp.c:1357 [ zrtp engine]: WARNING! HELLO Max retransmissions count reached (20 retries). ID=2 2016-01-15 18:24:26.117172 [DEBUG] switch_rtp.c:1357 [ zrtp]: Stream ID=2 CLEAR switching <START> ---> <NOZRTP>. 2016-01-15 18:24:26.197288 [DEBUG] switch_rtp.c:1357 [ zrtp utils]: Send <HELLO> ssrc=1503386214 seq=63975 size=144. Stream 3:CLEAR:START 2016-01-15 18:24:26.397576 [DEBUG] switch_rtp.c:1357 [ zrtp engine]: WARNING! HELLO Max retransmissions count reached (20 retries). ID=3 2016-01-15 18:24:26.397576 [DEBUG] switch_rtp.c:1357 [ zrtp]: Stream ID=3 CLEAR switching <START> ---> <NOZRTP>. Thanks, Varsha