*****Called each phone's extension successfully several times.***** *CLI> sip show peers Name/username Host Dyn Nat ACL Mask Port Status 23/23 192.168.0.23 D 255.255.255.255 5060 OK (40 ms) 22/poly 192.168.0.22 D 255.255.255.255 5060 OK (76 ms) 1/1 192.168.0.21 D 255.255.255.255 5060 OK (4 ms) 3 sip peers [3 online , 0 offline] -- Executing Dial("SIP/22-78b5", "Zap/1/18002963149") in new stack -- Called 1/18002963149 -- Zap/1-1 answered SIP/22-78b5 -- Started music on hold, class 'default', on Zap/1-1 -- Executing Dial("SIP/22-289e", "SIP/23|20|Tt") in new stack -- Called 23 *****Tried to transfer***** Nov 4 14:18:14 NOTICE[9714]: chan_sip.c:1614 auto_congest: Auto-congesting SIP/23-529c -- SIP/23-529c is circuit-busy == Everyone is busy/congested at this time (1:0/1/0) -- Executing Hangup("SIP/22-289e", "") in new stack == Spawn extension (local-access, 23, 2) exited non-zero on 'SIP/22-289e' Nov 4 14:18:16 WARNING[9714]: chan_sip.c:886 retrans_pkt: Maximum retries exceeded on call 4f26f559233ffb347dd6146310abd75f@192.168.0.10 for seqno 102 (Critical Request) Nov 4 14:18:20 WARNING[9714]: chan_sip.c:886 retrans_pkt: Maximum retries exceeded on call 4f26f559233ffb347dd6146310abd75f@192.168.0.10 for seqno 102 (Non-critical Request) Nov 4 14:18:42 NOTICE[9714]: chan_sip.c:9628 sip_poke_noanswer: Peer '23' is now UNREACHABLE! Last qualify: 40 Nov 4 14:19:04 NOTICE[9714]: chan_sip.c:8103 handle_response: Peer '23' is now REACHABLE! (41ms / 1000ms) -- Stopped music on hold on Zap/1-1 -- Hungup 'Zap/1-1' == Spawn extension (local-access, 18002963149, 1) exited non-zero on 'SIP/22-78b5' sip show peers Name/username Host Dyn Nat ACL Mask Port Status 23/23 192.168.0.23 D 255.255.255.255 5060 OK (41 ms) 22/poly 192.168.0.22 D 255.255.255.255 5060 OK (80 ms) 1/1 192.168.0.21 D 255.255.255.255 5060 OK (5 ms) 3 sip peers [3 online , 0 offline] *****Picked up line 22(Polycom) called line 23(Zyxel)***** -- Executing Dial("SIP/22-3e55", "SIP/23|20|Tt") in new stack -- Called 23 Nov 4 14:19:43 NOTICE[9714]: chan_sip.c:1614 auto_congest: Auto-congesting SIP/23-3fab -- SIP/23-3fab is circuit-busy == Everyone is busy/congested at this time (1:0/1/0) -- Executing Hangup("SIP/22-3e55", "") in new stack == Spawn extension (local-access, 23, 2) exited non-zero on 'SIP/22-3e55' Nov 4 14:19:45 WARNING[9714]: chan_sip.c:886 retrans_pkt: Maximum retries exceeded on call 2d856de944b342cc076292de7b21bb1a@192.168.0.10 for seqno 102 (Critical Request) -- Executing Dial("SIP/23-c919", "SIP/22|20|Tt") in new stack -- Called 22 -- SIP/22-c314 is ringing == Spawn extension (local-access, 22, 1) exited non-zero on 'SIP/23-c919' -- Executing Dial("SIP/23-0c38", "SIP/22|20|Tt") in new stack -- Called 22 -- SIP/22-9ffd is ringing == Spawn extension (local-access, 22, 1) exited non-zero on 'SIP/23-0c38' -- Executing Dial("SIP/22-77d7", "SIP/23|20|Tt") in new stack -- Called 23 -- SIP/23-f36a is ringing -- Got SIP response 486 "Busy" back from 192.168.0.23 -- SIP/23-f36a is busy == Everyone is busy/congested at this time (1:1/0/0) -- Executing Hangup("SIP/22-77d7", "") in new stack == Spawn extension (local-access, 23, 2) exited non-zero on 'SIP/22-77d7' -- Executing Dial("SIP/22-762b", "SIP/23|20|Tt") in new stack -- Called 23 -- SIP/23-372c is ringing == Spawn extension (local-access, 23, 1) exited non-zero on 'SIP/22-762b' Nov 4 14:22:08 NOTICE[9714]: chan_sip.c:9628 sip_poke_noanswer: Peer '23' is now UNREACHABLE! Last qualify: 38 sip show peers Name/username Host Dyn Nat ACL Mask Port Status 23/23 192.168.0.23 D 255.255.255.255 5060 UNREACHABLE 22/poly 192.168.0.22 D 255.255.255.255 5060 OK (74 ms) 1/1 192.168.0.21 D 255.255.255.255 5060 OK (4 ms) 3 sip peers [2 online , 1 offline] ***** Then I dial something from line 23****** 3 sip peers [2 online , 1 offline] *CLI> Nov 4 14:22:56 NOTICE[9714]: chan_sip.c:8103 handle_response: Peer '23' is now REACHABLE! (51ms / 1000ms) sip show peers Name/username