Warnings when receiving BUSY from gateway

Just ran into this issue with a new installation. I have a Cisco gateway with a single PRI. Any time I receive a BUSY back on from the Cisco I get spammed with Warnings from Asterisk until I ‘soft hangup’ that channel. Any insight would be great.

Asterisk: 1.2.13
Zaptel: 1.2.11 (ztdummy)

[code]
== Manager ‘sendcron’ logged on from 127.0.0.1
– Executing MeetMe(“Local/8600054@default-2f50,2”, “8600054”) in new stack
> Channel Local/8600054@default-2f50,1 was answered.
– Executing AGI(“Local/8600054@default-2f50,1”, “agi://127.0.0.1:4577/call_log”) in new stack
– AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
– Executing Dial(“Local/8600054@default-2f50,1”, “SIP/cisco/1XXX4284760||o”) in new stack
– Called cisco/1XXX4284760
– Got SIP response 486 “Busy here” back from 172.18.0.2
– SIP/cisco-094f2bf8 is busy
== Everyone is busy/congested at this time (1:1/0/0)
– Executing Hangup(“Local/8600054@default-2f50,1”, “”) in new stack
== Spawn extension (default, 12464284760, 3) exited non-zero on ‘Local/8600054@default-2f50,1’
– Executing DeadAGI(“Local/8600054@default-2f50,1”, “agi://127.0.0.1:4577/call_log”) in new stack
– AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
– Executing DeadAGI(“Local/8600054@default-2f50,1”, “agi://127.0.0.1:4577/VD_hangup–HVcauses–PRI-----NODEBUG-----17-----BUSY----------”) in new stack
– AGI Script agi://127.0.0.1:4577/VD_hangup–HVcause … ---------- completed, returning 0
Nov 29 18:49:46 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:46 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:46 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:46 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:46 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:46 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:46 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:47 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:47 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:47 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:47 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:47 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:47 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success
Nov 29 18:49:47 WARNING[11062]: app_meetme.c:1546 conf_run: Unable to write frame to channel: Success

[code]

Thanks,
Art