Mitel SX-200 Practices page 990

Circuit Card Descriptions
Data from one of the seven Fiber Maintenance Links are switched by the Fiber
Maintenance Link multiplexer onto Channels 2 to IO of the Control Maintenance Link.
The Fiber Maintenance Links selection bits (ID) are multiplexed onto channel Il.
One common System Fail Transfer (SFT) signal driven by the SANITY signal from the
Main control Card is provided.
Surge protection for the Maintenance and Printer Ports is provided by transorb diodes,
Fortroubleshooting purposes, four dip switches are provided on the CRC faceplate to
allow a maintenance person to force connectivity to either the Control or Peripheral
Cabinet. See Table 4-l for the required switch settings.
,
Switch Settings
Table 4-l Control Resource Card Switch Settings
Normal Operation
Forced Maintenance
to Control
Forced Maintenance
to Peripheral
Sl
Closed
Open
Cliled
Open
Switch Settings
s2 s3
Closed
Not Used
Open
Not Used
Closed Not Used
s4
Not Used
Not Used
Not Used
I
I I I
Only one maintenance sesslon, at elther the Control Cablnet or at one of the
Peripheral Bays, Is allowed to be In progress at one tlme.
125 4-2 Revision 0 9109-096-l 25-NA Issue 1