Black Box 3600 MODEM manual Return Online O, Long Space Disconnect Y, Bis Guard Tones &G

AT Commands

Return Online O

Use the O command when you are operating in the online command mode and need to return to data mode. It returns the modem to the same mode (originate or answer) that it was in before escaping to the (online) command mode. Enter the O1 command to cause a retrain to occur before going back to data mode.

Long Space Disconnect Y

One method of disconnecting two modems is called long space disconnect. When any disconnect condition is detected by the local modem, it will send 4 seconds of data space condition to the remote modem before disconnecting. This signals the remote modem to disconnect. The local modem will disconnect if it receives 1.6 or more seconds of data space condition from a remote modem. If break sequences of 1.6 or more seconds are to be sent, enter the Y command to disable this feature and prevent unintentional disconnects.

Note

This option must be disabled if SDLC NRZI data is used.

Command	Operation
Y	Long space disconnect off
Y1	Long space disconnect on

V.22 bis Guard Tones &G

Guard tones are not used in the United States. If required where operating the unit, select the appropriate guard tone.

Command	Operation
&G	No guard tone
&G1	550 Hz guard tone
&G2	1800 Hz guard tone

Asynchronous / Synchronous Mode Selection &M

The &M commands select synchronous or asynchronous operation and synchronous dial method.

Modem 3600 5-25