21 May, 1999
SYSTEM FEATURES
2-33
Detailed
Descriptions
2.3.3 SEP/SUB CODING
Overview
ITU-T introduced the following protocol signals in the T.30 recommendation in
1996. These signals enable confidential transmission and secured polling between
machines produced by different manufacturers.
SEP (Selective Polling): This signal informs the other terminal of the polling ID to
enable secured (ID) polling.
Up to 20 digits or characters can be sent in a SEP frame.
PWD (Password): This signal informs the other terminal of the password to enable
extra security.
Up to 20 digits or characters can be sent in a PWD frame.
SUB (Sub-address): This signal informs a sub-address of a destination. Some fax
servers use this information to route a received fax message to a specific address
in the local network.
Up to 20 digits or characters can be sent in a SUB frame.
SID (Sender ID): This signal informs the other terminal of the sender ID to identify
the transmitter.
Up to 20 digits or characters can be sent in a SID frame.
The ITU-T recommendation only clarifies the requirements for the transmitting
terminal, and does not specify the requirements for the receiving terminal. How the
receiving terminal treats these signals varies with receiver terminal and
manufacturer.
NOTE: This machine is not capable of receiving above (SEP/PWD/SUB/SID)
signals.
