Control of the SIP debug output is governed by the following command

Where the <debug_level_int> is a bitmask and the individual values determine whether the listed items are logged or not. The <debug_level_int> can be

1 - configuration changes. Mainly addition/deletion/modification of virtual domains.

2 - (TCP) connection accepts or connects, redirect creation

4 - create or delete a session

16 - any IO read or write

32 - an ASCII dump of all data read or written

64 - Include HEX dump in the above output

128 - any activity related to the use of the FortiCarrier dynamic profile feature to determine the correct profile-group to use

256 - log summary of interesting fields in a SIP call

1024 - any activity related to SIP geo-redundancy.

2048 - any activity related to HA syncing of SIP calls.