[Serusers] Re: [Sems] ivr.record and DTMF tone

[Juha Heinanen]

1. Every domain has their own 3 or 4 digit dial plan.
When they call PSTN, their caller id should be the
either a prefix plus their internal number or a
generic receptionist number, but not the 3/4 digit
internal number. Different domains have different
prefix. Is there a way to do this without changing the
script for every domain?

yes, you append rpid header to the request, which you get from database
or radius.

2. Should interdomain calls be prohibited? Is it
preferred to send the call to PSTN and hairpin back? I
know it consumes more resources but would it provide
better privacy? If that's the case, how to prevent
interdomain calls, i.e. how to verify from and to URI
have the same host parts?

i don't see any point in prohibiting interdomain calls unless you are a
telco and want to milk your cows for nothing.

3. When PSTN calls come in, should I use prefix2domain
in pdt module to convert the PSTN number to a local
domain number? Any pitfalls?

i would use globally unique numbers in register requests and in the from
field.  otherwise there is likely to be pitfalls in interdomain calls.
when you do that, there is no need for conversions when calls come in
from pstn.

-- juha