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Constructional Details AM64/128A User Manual
6
2. CONSTRUCTIONAL DETAILS
2.1 Baseband Modems
The BBM is housed in a black plastic case. On the front panel there is a menu driven LCD display with six
keys and five LED's. On the back panel there is a 3- pin IEC mains inlet socket, an input voltage selector
switch (230V/120V), a 6-way - 4-loaded RJ11 connector type line cord socket, and one data interface
connector. The data interface connector type will be from one of the six user specified interfaces available.
Inside the plastic case is a metal case which contains the main PCB. The metal case is for EMC screening
purposes. The front panel assembly containing the LCD, the keys, and the LED's are attached to the main
PCB by two connectors feeding through the metal case.
The BBM is packed with a 2 meter mains lead, terminating on one end with a UK 3-pin mains plug as
standard (or other plug if specified) and 3-pin IEC connector on the other. Also included is a double ended
FCC connector 6-way 4-loaded RJ11 to BT 631A plug line cord (as standard, however other optional line
cord plugs are available). These are both packed with the unit in separate tie-wrapped polythene bags.
The over all dimensions of the unit are 274L x 251W x 55H mm.
Figure 2.1.1 shows the BBMs front panel.
2.2 Interface Modules
Six versions of the AM-64/128A are available, each with a different interface module fitted from X.21,
X.21bis, V.35, V.36, RS530 and G.703. Each interface module is physically different from the others :
X.21 - 15 way D- type socket Part Number -2/203/102/100.
X.21bis - 25 way D- type socket Part Number -2/203/202/100.
V.35 - 34 way MRAC socket Part Number -2/203/302/100.
V.36 - 37 way D- type socket Part Number -2/203/402/100.
RS.530 - 25 way D- type socket Part Number -2/203/502/100.
G.703 - 9 way D- type socket Part Number -2/203/602/100.
The existing interface module can be changed out using a pluggable replacement unit. These can be
ordered separately as per the part numbers detailed above.
atl AM-64/128A