Mitel Panther II 820 System Manual page 83

Panther II 820/1032/2064-100
Key Service Unit (KSU)
2.0 4 The Key Service Unit, typified in Figure 2-2, is a microprocessor-controlled
unit employing space division switching and stored program control to provide all of
the switching and control requirements of the system. The KSU is wall mounted, and
has connectors which facilitate connection of lines, telephone sets and ancillary
equipment. The external lines are connected to the KSU directly. The sets are
connected to the KSU via a Terminal Block (typically a 66Block or Bix Block). A 50-
pin connector connects the KSU to the Terminal Block, while 4-wire cables connect the
Terminal Block to the sets (except where off-hook voice announce on a Panther II
Display Set is used). Ancillary equipment is connected to the KSU directly, using the
appropriate cable7connector. The two KSUs of the Panther II 2064 system are
connected by two expansion cables included with the Panther II 2064 KSU. The
Panther II 2064 KSU is mounted on the 1032 KSU using a mounting bracket
(included with the Panther II 2064 KSU). Refer to
Panther II 82O/IO32/2064-200,
Installation ad Commissioning
for installation instructions.
2.0 5 The KSU operates from a 110 Vat, 60 Hz, 15 Amp mains supply. An external
24 Vdc battery backup unit can be connected to the KSU to maintain operation in the
event of A.C. line power failure.
Figure 2-2 Key Service Unit
General Information
Page 7