User`s manual

&D DTR control
This command configures the DTR options.
&D or &D0 DTR off: command mode; DTR on: data mode. Answer incoming switched call if S0=1 (option
normally used for leased line mode).
&D1 Dropping DTR enters command mode. Return to data mode with “ATO” command or when a
switched call connects. Answer incoming switched call if DTR is on and S0=1.
&D2 Dropping DTR terminates switched call and enters command mode. Return to data mode with
“ATO” command or when a switched call connects. Answer incoming switched call if DTR is on and S0=1 (option
normally used for switched mode).
&F Restore factory configuration profile
This command restores the following configuration profiles
&F or &F0 Restores factory profile 0
Leased line 56K, slave timing, normal RTS, DCD and DSR
&F1 Restores factory profile 1
Switched 56K line, answer incoming calls
&F2 Restores factory profile 2
Clear Channel 64K lease line, slave timing, normal RTS, DCD and DSR
&L Dial or Leased line control
This command configures the DSU for switched or leased line operation (powerup configuration is defined by DIP switch 1)
&L or &L0 Selects a Switched 56K dial mode
&L1 Selects leased line
&N Leased line rate configuration (powerup configuration is defined by DIP switch 2)
&N or &N0 Configure leased line rate to 56K
&N1 Configure leased line rate to 64K
&R RTS/CTS control
This command configures the RTS options.
&R or &R0 Normal RTS - CTS follows RTS (powerup default)
&R1 Force RTS on - RTS is forced on to the DSU (CTS is on also)
(note: CTS operation can be effected by &C command.)
&S DSR control
This command configures the DSR options.
&S or &S0 Force DSR on permanently
&S1 Normal DSR - DSR is on when all conditions are met for transmitting data (powerup default).
&T Test configuration
&T or &T0 Stops the current test in progress
&T1 LL - Initiates the Local Analog Loopback test. The DSU/CSU performs a loopback close to the
Telco interface. Data is looped back from the DTE as well as the Telco line.
&T3 RT - Initiates the Remote Terminal loopback test. The DSU/CSU performs a loopback close to
the DTE interface. Data is looped back to the DTE as well as the Telco line.
&T4 Enable Remote Loopback (RL) - Allows the DSU/CSU to respond to a remote CSU’s (RL)
request (powerup default).
&T5 Disable Remote Loopback (RL) - ignore remote CSU’s RL request.
&T6 (RL) - Initiate a remote loopback test. This test verifies the local CSU, the remote CSU and the
telephone line.