Until now, SIP trunk lines were given the SIP ID as the switchboard number, which was adapted to suit the telephone number. However, this method is not supported by all trunk-line suppliers.
For this reason LCOS 7.52 and later provides the SIP mapping table that, like ISDN mapping, explicitly defines how telephone numbers are to be processed.
0123456789# -> #
This allows the extension numbers of the trunk to be translated 1:1 to the internal telephone numbers.
Note: If you have until now used a trunk with automatic switchboard-number
translation and you update to LCOS 7.52, then it is imperative that
you make a corresponding entry in the SIP mapping table.