Toshiba STRATA DK24 Manual page 110

INSTALLATION-CONFIGURATION
SECTION 200-096-204
FEBRUARY 1991
CONFIGURATION GUIDE, WORKSHEET 6
(miscellaneous option requirements)
.
G. CRCU PCBs (refer to Table 4-F):
1. A CRCU (-4 or -8) must be installed on the PCTUSl or PCTU2 or PCTU3 PCB if the customer
has TIE lines, DISA CO lines, or is using standard telephones or voice mail type devices
connected to PSTU or PESU standard telephone ports.
2. For normal traffic, a CRCU-4 (providing four DTMF receiver circuits) will be sufficient. However,
for extremely high traffic requirements, a CRCU-8 (providing eight DTMF receiver circuits) may
be required.
CRCU-4 or CRCU-8
NOTE:
Only one CRCU can be used per system.
H. EOCU (refer to Table 4-F):
An EOCU must be installed on each PEKU and/or PESU that is connected to electronic telephones
receiving off-hook voice announcements (OCA).
Actual EOCU PCBs
NOTES:
1. One EOCU for each PEKU or PEW that supports electronic telephones that must receive OCA.
2. Be sure thatproperconsideration is given to where the PEKU or PESU is placed to provide the most
efficient use of the 8-circuit EOCU. The PESU only provides four electronic telephone ports; the
DSS consoles take a way two ports on a PEKU; an HDCB takes a way one port on a PESU or PEKU.
3. AnEOCU(OCA)willnotfunctioninslotsll - 14onDK96andslots05-06onDK24withPCTUSl.
I. DVSU (refer to Table 4-F):
One DVSU is required for each digital telephone receiving OCA.
Actual DVSU
J. HVSWHVSI (refer to Table 4-F):
One HVSU and one HVSI is required for each electronic telephone receiving 00,.
Actual HVSU
and HVSI
K. IMDU PCB (refer to Table 4-F):
One IMDU PCB must be installed on the PIOU or PIOUS PCB to provide built-in remote maintenance
capability.
L. HHEU PCB (refer to Table 4-F):
One HHEU PCB must be installed in each digital and electronic telephone that
suppo& a headset
or
connects to an HESB providing a loud ringing bell.
Actual HHEU PCBs
4-15