Re: Problems with "bounce" to a legacy fax via PSTN

["Robert A. Rosenberg" <hal9001@xxxxxxxxx>]

At 14:52 -0700 5/15/97, Charles Kline wrote:

>[T]he T.30 protocol does NOT give us any reliable PSTN number.  (T.30 does
>not have any way of the sender sending the phone number!)  So in message
>(store and forward) mode, there is no reliable way to send a "bounce" back
>to the sending legacy fax.

That's odd. Where does the Sending Fax Number that appears on the display
of the Receiving Fax come from in that case? I agree that the number may
not have been entered as a parameter on the Sending Fax Machine (or may be
inaccurate [such as being the Sender's Voice Number not that of the Fax
Machine]) but there is provision for the transmission of an Fax Machine
Identity in the Fax Protocol (or it could be during the Fax
Handshake/Negotiation Stage).