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Pass caller ID when call forwarding from phone
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tima Offline
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Post: #1
Pass caller ID when call forwarding from phone
Hello,

A client of ours would like the caller ID passed when enabling call forwarding from T4X series phones. Is there a system setting or property to allow the inbound callers caller ID to be sent back out when the phone forwards a call?

IE: 419-555-1212 makes a call to a T4X phone 800-555-5555 set to forward all calls to 419-666-1111. I would like when 419-666-1111 looks at the caller ID to see "419-555-1212" rather then 800-555-5555.

Thanks,

Tim
10-01-2015 04:16 AM
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Chris Barron Offline
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Post: #2
RE: Pass caller ID when call forwarding from phone
If the call forward is set in the PBX rather than the phone (or the phone instructs the PBX to set the call forward) then the PBX has to be configured to allow the inbound Caller ID to be sent out as the origin of the forwarded call. The default is normally to use the extension- CLI mapping ie the extensions own CLI or that of the site.

Some carriers and national administrations insist that any outbound CLI, forwarded or dialled 'belongs' to the PBX.

If the phone itself is doing the forwarding, the same system setting would apply.

Its certainly possible in Asterisk . In the systems setting GUI there will be a statement something like 'Allow A Party CLI'
on forwarded calls.
10-01-2015 09:25 PM
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keffa Offline
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Post: #3
RE: Pass caller ID when call forwarding from phone
To slightly simplify Chris's explanation, this works one of two ways...

1. Caller calls phone A, who forwards the call to phone B. However the forward is done within the same PBX or a private trunk. In this case, it's trivial and simple and is merely a case of insuring the correct settings are enabled on the PBX and phone.

2. Caller calls phone A, who forwards the call via an external call using the public switched telephone system (Otherwise known as the PSTN or more simply, your phone company), to phone B. In this case it probably will not, and will never, work. The reason for this is no public phone carrier would ever allow the passing of custom CLID because it would open the phone system to some serious abuse. The CLID would always be from phone A's breakout point into the PSTN which means, using the example you gave, the call will always show 800-555-5555.

You need to work out which of the two scenarios above describes your situation.
10-01-2015 11:01 PM
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