Extensions_custom.conf - empty header - replace possible?

[iceget]

dear community,

i have the following problem:

in my dialplan i have this (old setup, i cannot change):
exten => _X.,n,Set(CALLERID(num)=${SIP_HEADER(cid)})

now i will need only this (is this possible to solve?)

if(CALLERID(num)=="")
{
exten => _X.,n,Set(CALLERID(num)=${SIP_HEADER(cid)})
}

or are possibility for that function?

currently if the CALLERID(num) will be send, then my SIP_HEADER(cid) always replace my CALLERID(num). but i only need the replacement if i get no CALLERID(num) ?

thank you so much

[lgaetz (Lorne Gaetz)]

What is this dialplan supposed to do? There is probably a better way to accomplish your goal.

[iceget]

dear igaetz,

i have some custom configurerd asterisks what add via SIP_HEADER(cid),
but unfortunately the value CALLERID is now replaced even if no data is sent in the SIP HEADER(cid).

now i want do a goto or a if no SIP _HEADER(cid) will be send, that then the Set(CALLERID… will not be processed.

can you help me how do handle that?

thank you

[lgaetz (Lorne Gaetz)]

The supported way to add custom dialplan like this is to use a dialplan hook: Hooking for fun and income

But even better, if these are calls arriving on a specific trunk that need this treatment, then you should have a special context for the trunk.

You can test for the value of CALLERID(number) before setting with a line like this:

SetIf($["CALLERID(number)"=""]?CALLERID(number)=${SIP_HEADER(cid)})

lr;dt = looks right; didn’t test