Pulse Dialing - Diamond SupraExpress 56e Manual

Physical Protocols
Descriptions of actual electronic signals used to communicate over phone lines. For example,
Bell 103/ 212A, ITU-TSS V.21/V.22/V.22bis/V.3 /V.32bis. Synonym: Transmission Protocols.

Pulse Dialing

A means of telling the Central Office the number to be reached. Pulse dialing can be
recognized by clicks, instead of beeps, when dialing. Not all phone systems support touch tone
dialing; pulse dialing is the alternative. All Supra modems can use tone or pulse dialing.
Reliable Connection
A connection that uses one of the error correction or data compression protocols available.
Remote Modem
The modem to which you connect.
RAM
Random Access Memory. See also NOVRAM.
ROM
Read Only Memory: the "brains" of your modem.
REN (Ringer Equivalence Number)
A number indicating the amount or quantity of ringers (or products) which may be connected
to a single phone line and still ring. The total of all RENs connected to a single line may not
exceed the value of five (5) or some or all of the ringers may not work. In some cases the
maximum REN may be lower. Check with your local phone company if you are interested in
the exact maximum REN for your line. Most Supra modems have a REN of 0.3 (REN is also
called the "Load Number" in some cases).
RTS/CTS
Request to Send/Clear to Send. See Hardware Handshaking.
Silent Answer
Silent Answer allows your modem to "listen in" on an incoming phone call and determine
whether or not the incoming call is a voice call or a fax call. After the call is answered by you or
your answering machine, the modem listens for CNG tones. If they are detected, the modem
will take the call. If they are not detected, the modem will ignore the call.
Synchronous
In synchronous transmission, blocks of data are sent at strictly timed intervals. The timing is
uniform and no Start/Stop bits are required. Standard telephone lines carry a synchronous
data stream.
Telephone Answering Device (TAD)
Terminal Stay Resident (TSR)
Programs that are run once then remain in memory in order to be activated by a sequence of
key strokes or a hotkey. It is possible that a TSR may take up too much memory and cause
conflicts with other programs.
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