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COMSPHERE 3800Plus Modems
13-12 October 1998 3980-A2-GB30-40
Table 13-1
(10 of 15)
3800
Plus
AT Commands
AT Command Front Panel BranchDescription
&T
n
Tests
&T0 Abort. Stops any test in progress.
&T1 Local Analog Loop.
&T2 Pattern. Transmits and receives a 511 Bit Error Rate Test (BERT).
&T3 Local Digital Loopback test.
&T4 Enables Receive Remote Loopback Response configuration option.
&T5 Disables Receive Remote Loopback Response configuration
option.
&T6 Remote Digital Loopback test.
&T7 Remote Digital Loopback with Pattern.
&T8 Local Loopback with Pattern.
&T9 Self-Test.
Test
&T4 and &T5:
Configure\Edit\Tests
&V
n
View Configuration Options
Displays each configuration group within the Active (Operating), Active
(Saved), Customer 1, and Customer 2 configuration areas as well as the
telephone numbers stores in directory locations 1–10.
The output of the &V command can be saved to a file and printed (using
your communications software), providing both a record of your
configuration and a worksheet for configuration enhancements.
&V0 Active (Operating) configuration options.
&V1 Active (Saved) configuration options.
&V2 Customer 1 configuration options.
&V3 Customer 2 configuration options.
&V4 Directory locations 1–10.
None
&W
n
Write (Save to Memory)
Saves the current configuration options in Active (Operating) to one of
three configuration areas. This is required to make any configuration
changes permanent.
&W0 Saved to Active(Save).
&W1 Saved to Customer 1.
&W2 Saved to Customer 2.
Configure\Save
&X
n
Transmit Clock Source
&X0 Internal. Modem provides transmit clock source for synchronous
data (Pin 15).
&X1 External. Modem derives external transmit clock source provided on
Pin 24 for synchronous data.
&X2 Receive Clock Loop. Modem derives transmit clock source from
receive signal for synchronous data (Pin 17).
Configure\Edit\
DTE Interface
&Z
n=x
Store Telephone Numbers
Modem saves the telephone numbers and dial command modifiers (if any)
entered for
x
(up to 40 characters in length) in Directory Location
n
(1–10).
For example, the command AT&Z1=5551234 stores the telephone number
555-1234 into directory location 1.
To clear a telephone number from a memory location, issue the
&Z
n
=
x
command without entering a telephone number.
Call Setup\
Change Directory