Hi, the following logs are being generated while i test sip-to-sip windows software phones. Dec 7 17:05:16 WARNING[-159503440]: chan_sip.c:683 retrans_pkt: Maximum retries exceeded on call 40dedd1535853f17250b4d0854e35c17@200.75.243.237 for seqno 102 (Critical Request) == No one is available to answer at this time Dec 7 17:05:22 WARNING[-159503440]: chan_sip.c:683 retrans_pkt: Maximum retries exceeded on call 40dedd1535853f17250b4d0854e35c17@200.75.243.237 for seqno 102 (Non-critical Request) Dec 7 17:05:26 WARNING[-176354384]: pbx.c:1933 ast_pbx_run: Timeout, but no rule 't' in context 'sip' -- Executing Dial("SIP/erick2-db3b", "SIP/erick1") in new stack -- Called erick1 Dec 7 17:05:56 WARNING[-159503440]: chan_sip.c:683 retrans_pkt: Maximum retries exceeded on call 5184f4e66bc98ae361f5f5f512858a9f@200.75.243.237 for seqno 102 (Critical Request) == No one is available to answer at this time Dec 7 17:06:02 WARNING[-159503440]: chan_sip.c:683 retrans_pkt: Maximum retries exceeded on call 5184f4e66bc98ae361f5f5f512858a9f@200.75.243.237 for seqno 102 (Non-critical Request) Dec 7 17:06:06 NOTICE[-176354384]: rtp.c:420 ast_rtp_read: RTP: Received packet with bad UDP checksum Dec 7 17:06:06 WARNING[-176354384]: pbx.c:1933 ast_pbx_run: Timeout, but no rule 't' in context 'sip' -- Executing Dial("SIP/erick1-4afc", "SIP/erick2") in new stack -- Called erick2 -- SIP/erick2-f752 is ringing -- SIP/erick2-f752 answered SIP/erick1-4afc -- Attempting native bridge of SIP/erick1-4afc and SIP/erick2-f752 Dec 7 17:08:13 WARNING[-159503440]: chan_sip.c:683 retrans_pkt: Maximum retries exceeded on call ECC33A73-9D42-40F4-BCBA-E1559ECC4B30@10.120.1.58 for seqno 53352 (Non-critical Response) == Spawn extension (sip, 2000, 1) exited non-zero on 'SIP/erick1-4afc' -- Executing Dial("SIP/erick2-efd9", "SIP/erick2") in new stack -- Called erick2 -- SIP/erick2-9cf9 is ringing -- SIP/erick2-9cf9 answered SIP/erick2-efd9 -- Attempting native bridge of SIP/erick2-efd9 and SIP/erick2-9cf9 -- Started music on hold, class 'default', on SIP/erick2-9cf9 -- Stopped music on hold on SIP/erick2-9cf9 == Spawn extension (sip, 2000, 1) exited non-zero on 'SIP/erick2-efd9' -- Executing Dial("SIP/erick2-2685", "SIP/erick2") in new stack -- Called erick2 -- SIP/erick2-eeae is ringing they always drop the call. suggestions? thanks,