COMSPHERE 3825Plus Modem
Glossary-6
November 1996
3825-A2-GB30-20
register
A part of the modem’s memory that contains values that determine the modem’s operating
characteristics.
remote loopback
A test that sends a signal to the remote modem to test the local modem, the remote modem, and
the circuit between them.
result code
An asynchronous message (in either numbers or words) that the modem sends to the DTE after
executing or trying to execute a command.
RJ11
A type of 6-position jack normally used with permissive dial networks and telephone sets.
rotary
A TELCO service whereby multiple lines to a customer premise share a common telephone
number.
serial transmission
A way of transmitting data in which bits are sent sequentially one at a time.
S-registers
Registers that contain information affecting modem operation. S-register commands must be
preceded by the AT prefix.
Sync Dial
A factory preset configuration area containing configuration options most often used in
synchronous dial networks.
synchronous transmission
Data transmission that is synchronized by timing signals. Characters are sent at a fixed rate. This
type of transmission is more efficient than asynchronous transmission.
tone dialing
One of two dialing methods, in which telephone numbers are sent as tones across the telephone
lines.
training
A process where two modems try to establish a connection over the VF line.
UL
Underwriter’s Laboratories, Inc.
UNIX Dial
A factory preset configuration area containing the configuration options most often used in a
UNIX dial network.
USOC
Universal Service Ordering Codes.
V.17
A fax communications standard for modems operating half-duplex with synchronous data at
14,400 bps.
V.22
A standard for modems operation full-duplex with asynchronous or synchronous data at 1200 bps
over the dial network (PSTN).
V.22bis
A standard for modems operating full-duplex with asynchronous or synchronous data at 1200 or
2400 bps over the dial network (PSTN).
V.25bis
A dialing protocol that permits direct and stored-number dialing in asynchronous, bisynchronous,
or HDLC modes.
V.27ter
A fax communications standard for modems operating half-duplex with synchronous data at 2400
and 4800 bps.
V.29
A fax communications standard for modems operating half-duplex with synchronous data at 7200
and 9600 bps.
V.32
A standard for modems operating full-duplex with asynchronous or synchronous data at 4800 or
9600 bps on switched (dial) or leased telephone lines.
