AT Commands

Disable AT Command Set *NT

The *NT command disables theAT command set.

The *NT1 command allows the user at a remote modem to enable AT command operation of another modem via remote configuration.

Command

Operation

 

 

*NT

Disable AT command set

 

 

*NT1

Enable AT command set at remote site

 

 

If the AT command set of a local modem is accidentally disabled and must be recovered locally, reset the options through the front panel LCD, Main Menu #5, submenu CHANGE DTE OPTIONS?, “AT COM- MAND SET” section on page 4-8.

Dial Line Transmit Level *TDn

Command

Operation

 

 

*TDn

Sets dial line TX level to n where n is a number 9

 

through 30 corresponding to a TX level of -9 to -30

 

dBm

 

 

Private Line Operation

Note

For a 2- or 4-wire leased line connection to succeed, one modem must be configured as forced answer and the other modem as normal originate. Both modems should have only one protocol, MNP or LAPM, enabled and Protocol Fallback must be disabled. DCE line speed must be the same for both modems.

4-Wire Operation

In 4-wire operation, the modem is a full-duplex, leased-line modem requiring a dedicated 4-wire leased line. Only point-to-point dedicated leased lines are supported. The 4-wire leased line connects to the TELSET/LEASED LINE jack on the modem rear panel. Dialing is not necessary. When connected via leased line the modems will train and begin communicating with each other. The DIAL jack can be used to connect a 2-wire dial-up line for dial backup.

Modem 3600

5-33

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Black Box 3600 MODEM Private Line Operation, Disable AT Command Set *NT, Dial Line Transmit Level *TDn, Wire Operation