[Apr  5 14:27:56] DEBUG[19871]: pbx.c:1767 pbx_extension_helper: Launching 'Dial'
    -- Executing [17771234567@to-callcentric:1] Dial("SIP/123-008319e0", "SIP/17771234567@callcentric") in new stack
[Apr  5 14:27:56] DEBUG[19871]: chan_sip.c:14948 sip_request_call: Asked to create a SIP channel with formats: 0x4 (ulaw)
[Apr  5 14:27:56] DEBUG[19871]: chan_sip.c:4217 sip_alloc: Allocating new SIP dialog for (No Call-ID) - INVITE (With RTP)
[Apr  5 14:27:56] WARNING[19871]: app_dial.c:1081 dial_exec_full: Unable to create channel of type 'SIP' (cause 3 - No route to destination)
  == Everyone is busy/congested at this time (1:0/0/1)
[Apr  5 14:27:56] DEBUG[19871]: rtp.c:1418 ast_rtp_early_bridge: Channel '<unspecified>' has no RTP, not doing anything
[Apr  5 14:27:56] DEBUG[19871]: app_dial.c:1639 dial_exec_full: Exiting with DIALSTATUS=CHANUNAVAIL.
[Apr  5 14:28:06] WARNING[19871]: pbx.c:2460 __ast_pbx_run: Timeout, but no rule 't' in context 'to-callcentric'