Toshiba Strata DK24 Installation And Maintenance Manual page 94

INSTALLATION-CONFIGURATION
SECTION 400-096-204
SEPTEMBER 1992
G. CRCU PCB (refer to Table 4-F):
1. A CRCU (-4 or -8) must be installed on the PCTUS1, PCTU1, PCTU2, PCTU3, or PCTU4 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.
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 which
are equipped to receive Off-hook Call Announce (OCA).
NOTE:
1. One EOCU for each PEKU or PESU that supports electronic telephones that must receive OCA.
2. Be sure that proper consideration 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; HDSS consoles use
two ports on a PEKU; HDCBs use one port on a PESU or PEKU.
3. An EOCU (OCA) will not function in slots 11 ~ 14 on DK96 and slots 05 ~ 06 on DK24 with PCTUS1.
I. DVSU (refer to Table 4-F):
One DVSU is required for each digital telephone that must receive OCA.
J. HVSU2 (refer to Table 4-F):
Electronic telephones equipped with an HVSU2 can receive OCA calls.
K. HVSU/HVSI (refer to Table 4-F):
Electronic telephones equipped with the HVSI and HVSU subassemblies can receive OCA calls.
L. 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 for the STRATA DK system.
M. HHEU PCB (refer to Table 4-F):
One HHEU PCB must be installed in each digital and electronic telephone that supports a headset or
connects to an HESB providing a loud ringing bell.
CONFIGURATION GUIDE, WORKSHEET 6
(Miscellaneous Option Requirements)
CRCU-4 or CRCU-8
Actual EOCU PCBs
Actual DVSU
Actual HVSU2s
Actual HVSUs/HVSIs
IMDU PCB
Actual HHEU PCBs
4-20