3Com 980/000048/001 manual Physical Description, Protocols

Physical Description A-3

Protocols

Extended AT command set. Non-volatile memory. 5 preset factory, 2 user defined configurations and one power-up configuration. 20 stored telephone numbers. AT or V.25bis asynchronous, bisynchronous and HDLC synchronous commands are entered via the DTE interface. ASCII or EBCDIC character set used in V.25bis command mode.

Autoanswer

CCITT V.25 compliant.

Busy

Busy out via AT command or DTR.

Disconnect

Call cleared selectable on loss of DTR; and/or no carrier for n seconds; and/or no data for n seconds; and/or a disconnect request is received from the remote modem in error correction.

Test Functions

Local analogue loop, local digital loop, or remote digital loop available using AT commands.

Physical Description

Power

16V ac, 47 to 63 Hz, 1A max. Typical power consumption 11 Watts.

Environment

Temperature 0 to 40 degrees centigrade operating. -50 to 70 degrees centigrade storage.

Relative humidity 5% to 95% non-condensing.

Altitude to 3000 meters.