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AM64/128A User Manual Installation
10
Set the line rate (section 5.7.2) as required at both ends, and set the user data rate up on the master
(section 5.5).
When the line is connected the FAULT LED should go out.
The interface details and synchronous or asynchronous working should now be configured at both ends.
This is done using the option menu (section 5.6).
Note : When the AM64/128A has the G.703 interface fitted, then the unit is only operational in Master
mode and a user rate of 64kbps. In this configuration, the unit will extract its timing from the G.703
interface and passes it to the Slave end of the link. It is NOT possible for the AM64/128A (set to Slave
mode) to have a G.703 Interface fitted.
The status menu should then be examined to check that the unit is correctly configured.
The following data is provided by this menu:
(a) Overall status (i.e. whether ready or not)
(b) Alarm messages
(c) User data rate
(d) Line rate
(e) Interface status
(f) Interface mode
To examine this data, first locate the status menu by using the left arrow key, then use the up/down arrows
to look at each item in turn.
With no DTE (Data Terminal Equipment) connected the results should be:
(a) S > LTU Ready or S > LTU Not Ready (Depends upon interface details)
(b) S > No Alarm
(c) Data rate as selected.
(d) Line rate as selected.
(e) Interface status as selected (usually all lines off, but depends on any X21bis options set)
(f) S > Link Mode
If the status is not correct the BBM must be reconfigured. (See section 5 on menu operation).
If the status is correct the DTE (Data Terminal Equipment) or a data tester may now be plugged into the
BBM.
In order for end to end data transfer to take place there must be no test loops active either locally or
remotely.
(The power up default for the Test Menu is no loops).