Telenetics 9.6, 2.4, 28.8, 14.4 manual No Function, Perform Local Digital Loopback See Figure

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&T2

NO FUNCTION

 

&T3

PERFORM LOCAL DIGITAL LOOPBACK (See Figure 3)

 

The modem must be in the command state with connection established

 

when this command is issued, otherwise an ERROR result code occurs.

 

The AT&T3 command establishes a loopback of received data, after

 

demodulation, and sends it back to the distant end. The modem is

 

configured for local digital loopback, DSR is turned off (if &S1 is in

 

effect), the test timer is started with the value in S18, and an OK result

 

code is sent to the DTE. If S18 contains a 0, the test must be terminated

 

by a &T0, H0, or Z command. The latter two result in the modem going

 

on hook. If S18 does not contain 0, the test is terminated after the number

 

of seconds stored in S18.

 

 

RESULT CODE

DESCRIPTION

 

OK

After 2 second delay

 

ERROR

If any other self test is active (&T1,

 

 

&T6, &T7 or &T8) or if in idle state.

 

 

When test is terminated.

&T4

GRANT REMOTE DIGITAL LOOPBACK (RDL) REQUESTS

 

When in the on-line state, the modem will honor a remote digital

 

loopback request from a distant modem if it occurs. This will result in an

 

ERROR if the command is given while any V.54 test is active (&T1, &T3,

 

&T6, &T7 or &T8).

 

NOTE: There are data patterns that may cause a Remote Digital Loopback conditions. Care should be given to the type of data being received so that no RDL modes will be initiated.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999

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Contents Installation, Operation & Diagnostics Telenetics Corporation Table of Contents Standards USAProduct Overview MIU Installation, Operation & Diagnostics Edition January 25 General Product Specifications VDCPower Down Power ModesMode Description Power Consumption Power On SleepModem Specifications MIU2.4 MIU9.6 MIU14.4 MIU28.8Power Connections Serial Data Port PIN-OUTS DIP Switch Settings Auto Reset Feature LED IndicatorAuto Dial Feature Outline Drawing & Mounting Modem Configuration Stored Profile Factory Configuration ~ MIU2.4 Active ProfileTelephone Numbers &Z0= Factory Configuration ~ MIU9.6 Active Profile Telephone NumbersFactory Configuration ~ MIU14.4 Active Profile Factory Configuration ~ MIU28.8 Active Profile Diagnostics T1 Initiate Local Analog Loopback See Figure T0 Terminate Test in ProgressResult Code Description Perform Local Digital Loopback See Figure No FunctionGrant Remote Digital Loopback RDL Requests T6 Initiate Remote Digital Loopback See Figure T5 Deny RDL RequestsT7 Initiate RDL with Local Self Test See Figure Result Codes Description T8 Local Loopback with Self Test See Figure T6, &T7, or if on-lineMIU Installation, Operation & Diagnostics Edition January 25 MIU Installation, Operation & Diagnostics Edition January 25 MIU Installation, Operation & Diagnostics Edition January 25 Received Line Signal Quality S86 Connection Failure CauseMIU Installation, Operation & Diagnostics Edition January 25 MIU Installation, Operation & Diagnostics Edition January 25