Can someone confirm this for me.. The only way to pass originating caller ID to a phone offsite is by twinning right? There is not a setup that would allow a user to forward their extension directly their cell phone and see the original calling party's CLID?
If your outbound call takes place over an analog trunk, then you simply cannot.
If your outboudn call takes place over a PRI or SIP trunk, then you can if your provider allows it (which may be limited to local laws where you are located).
SS - Pass Through Calling Number
Pass through the Calling Party Number. For example, to provide the incoming ICLID at the far end of a VoIP connection, a short code ? with telephone number .SS should be added to the IP line.
So that wont work on ISDN.
Many providers dont seem to work. I know BT doesnt.
We install a small SIP trunk, and this works, especially for twinning.
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