Comtech EF Data SMS-458B - Manual (Page 94)

SMS-458B Modem Protection Switch Revision2
Maintenance MN/SMS458B.IOM
5–8
5.3.3 IF Switch
The IF switch modules are located in the lower-front section of the switch.
1. Remove screws holding the board on the standoffs in the lower section of the
switch.
2. Disconnect the cables to each IF switch module one at a time.
3. Carefully remove the module from the inside of the lower-front section.
4. Replace the IF switch and connect all the connectors to their proper location.
5. Refer to Figure 1-5 for a complete wire list and cabling diagram.
5.3.4 Switch Driver
The switch driver module is located in slot 3 of the upper-front section of the switch.
Rotate the card ejector to extract the module.
5.3.5 Address Decoder/Driver
The address decoder/driver module is located in slot 4 of the upper-front section of the
switch. Rotate the card ejector to extract the module.
5.3.6 Monitor and Control
The M&C module is located in slot 5 of the upper-front section of the switch.
Rotate the card ejector to extract the module. Should the battery switch (JP6) be off, the
switch will require that some of the setup and configuration procedures be repeated. If the
battery switch is on, the configuration of the switch will be maintained and can be
transferred to another switch.
5.3.7 Online Telemetry
The online telemetry module is located in slot 6 of the upper-front section of the switch.
Rotate the card ejector to extract the module.
5.3.8 Interface Switches
The interface switch modules are located in slots A1 through A10 of the lower-rear
section of the switch. The modules are secured with captive screw fasteners. To extract a
module, unscrew the fasteners and pull the module out of its slot.