DID providers - Withheld Caller Id

I would like to spam trap calls from telemarketers, etc. I can actually
do this in many cases because a lot of telemarketers use easily
identifiable numbers. However they do also sometimes withhold their
numbers. I cannot routinely block withheld numbers as I also receive a
large number of calls from genuine uk businesses who very unhelpfully
also choose to withhold caller id.

I recently read that when a caller withholds caller id this does not in
itself prevent id information being sent, it just sets a flag saying the
entity providing the DID (Direct Inward Dialing) service should strip
the information before sending it on to the customer receiving the call.

It also appears that some DID providers for SIP lines do not do this.
I'm with Sipgate which does appear to strip the information. Does anyone
know of alternative DID providers who do not strip the information.

 

Yes, but if I posted it here it might stop and it's usful.
Is your email valid?

 

Yes my email is valid.

thks

 

"Graham." wrote in message

Yes, but if I posted it here it might stop and it's usful.
Is your email valid?

--
Graham.

%Profound_observation%


Hi Graham, That info would also be useful to me please...

Dave.