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COMSPHERE 3800 Series Modems – Model 3830
Glossary-10 August 1998 3830-A2-GB91-30
PSTN Public Switched Telephone Network. A network
shared among many users who can use telephones
to establish connections between two points. Also
known as dial network.
pulse dialing One of two dialing methods, in which telephone
numbers are sent as pulses (brief changes in
voltage or current intensity) across the telephone
line. Rotary telephones use pulse dialing.
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.
S-Registers Registers that contains information affecting the
modem parameters. All S-Registers must be
preceded by the AT prefix.
serial transmission A way of transmitting data in which bits are sent
sequentially one at a time.
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.