[asterisk-users] set callerid with plus sign

[ronald]

Hi,

Is it possible to assign a plus sign on the callerid(num) ?

currently this is what i do CALLERID(num)=+6523450017

but telco is denying calls, coz they said they are seeing "bs523450017" 
instead of +6523450017.

i tried putting it inside double quotes CALLERID(num)="+6523450017" 
telco says the same thing.

is this possible? thank you

Regards,
nhadie