[Asterisk-Users] Grandstreams randomly go busy with Asterisk?

[Robert Withrow]

I've searched the lists but I didn't find anything exactly like this.

I have two Grandstream BT101 phones connected to an Asterisk. 
Periodically, for reasons that I can't determine, one or the other (or
both) of the BT101s decide(s) to go on permanent busy.  Dialing that
phone gives:

    -- Executing Macro("SIP/24567-7856", "dialphone|SIP/27654") in new stack
    -- Executing Dial("SIP/24567-7856", "SIP/27654|10|tr") in new stack
Jun 15 14:23:41 NOTICE[1343506]: app_dial.c:536 dial_exec: Unable to create channel of type 'SIP'
  == Everyone is busy at this time

But dialing in the other direction (from the busy phone out) gives
normal (good) results:
 
    -- Executing Macro("SIP/27654-6e2b", "dialphone|SIP/24567") in new stack
    -- Executing Dial("SIP/27654-6e2b", "SIP/24567|10|tr") in new stack
    -- Called 24567

I have noticed that when the problem is happening I see this:

CLI> sip show peers
Name/username    Host                 Mask             Port     Status
24567/24567      192.168.2.253   (D)  255.255.255.255  5060     Unmonitored
27654/27654      (Unspecified)   (D)  255.255.255.255  0        Unmonitored

Rebooting the offending phone always fixes the problem for a while. 
After rebooting I see:

CLI> sip show peers
Name/username    Host                 Mask             Port     Status
24567/24567      192.168.2.253   (D)  255.255.255.255  5060     Unmonitored
27654/27654      192.168.2.254   (D)  255.255.255.255  5060     Unmonitored

The BT101s are running 1.0.4.55.  Asterisk is 0.9.0.

Any suggestions?

-- 
Robert Withrow, BWithrow at NortelNetworks.com, +1 978 288 8256, ESN 248