American Telecom AM64/128A - Manual (Page 30)

Menu Operation - Option Menu AM64/128A User Manual
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5.6 Option Menu
This menu displays the type of DTE interface currently fitted in the BBM. The AM64/128A automatically
“reads” which interface type is fitted on power up, and programs certain options accordingly. The first two
display options are read only. These display the following information:
(1) Overall protocol type X.21, X.21bis or G.703
(2) Interface type V.11, V.28, V.35, V.36, RS-530 or G.703
In X.21bis mode there are further levels in the options menu allowing the following parameters to be set.
(1) Control line options 105 set on, 108/1 set on, 106 delay, 107=108/1.
(2) Signalling rate Normal or Extended Rate
(3) Character Length 8,9,10 or 11 characters
This can be explained more clearly by considering the operation of the menu.
The top level display will show whether the interface type fitted, conforms to either X.21 or X.21bis.
The X.21 mode is shown as: O > X21
The X.21bis mode is shown as: O > X21 bis
5.6.1 X.21
If an X.21 interface is fitted then the next line will always be O > V11 Interface
All the V.11 interface lines are found on the 15 way D-type back panel connector.
5.6.2 X.21bis
If an interface conforming to X.21bis is fitted then the next line will be either: O > V28 Interface
or O > V35 Interface or O > V36 Interface or O > RS530 Interface
There are four control line options which can be applied to the X.21bis V.28 interface.
(1) O > 105 Normal Press SELECT: O > 105 Set On
This simply holds the control line 105 ON internally.
(2) O > 106 Normal Press SELECT: O > 106 Delay
This provides a 15ms delay between the line 105 going ON and line 106 going ON.