I came across a bug in PBXManager: When I edit a trunk and enter "call-limit=1" in the options field, the option is saved correctly in the sip.conf file. However, if I edit this trunk again, the option is removed.
Submitted by eeman on Tue, 04/06/2010
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Submitted by gb_delti on Wed, 04/07/2010
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you are running a 1.6.x.x branch of asterisk -
UPGRADING-1.6.txt:
* SIP: The "call-limit" option is marked as deprecated. It still works in this version of Asterisk, but will be removed in the following version. Please use the groupcount functions in the dialplan to enforce call limits. The "limitonpeer" configuration option is now renamed to "counteronpeer".
CHANGES 1.4.x to 1.6.0.x:
* A new option "busylevel" for setting a level of calls where asterisk reports a device as busy, to separate it from call-limit. This value is also added to the SIP_PEER dialplan function.