Toshiba Strata DK 24, Руководство по установке и обслуживанию

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4-9
INSTALLATION-CONFIGURATION
SECTION 400-096-204
SEPTEMBER 1992
•
The OCA upgrade for the electronic telephone is
the HVSU2, which installs inside the base of the
telephone. (The combined HVSU and HVSI sub-
assemblies can also provide electronic telephones
with OCA capability.) Each PEKU or PESU PCB
supporting electronic telephones equipped for OCA
must be upgraded with an EOCU. OCA-equipped
electronic telephones should be kept in groups of
four in concert with a particular PESU and in
groups of eight with a particular PEKU. Since the
EOCU connects to the PEKU or PESU, it does not
reduce the number of available universal slots.
•
All system slots, except DK96’s 11~14 and DK24’s
05 and 06 with PCTUS, can support telephones
that receive OCA.
2.60 Data and Modems with Release 1 or 2
2.61 Passing data at up to 9600 bits per second
(bps) through STRATA DK standard telephone
ports is possible. To accomplish this function, an
external, commercially available modem is required.
Most typically, the modem will be housed in a
personal computer and have its own two-wire modu-
lar connection. The modem is interfaced to STRATA
DK via a PSTU or PESU PCB , like a standard
telephone. The IMDU modem, discussed previ-
ously in Example 7, can only be used with the PIOU
or PIOUS PCB for remote maintenance.
IMPORTANT NOTE:
For data applications requiring more func-
tions than that provided by a personal
computer and modem, it is recommended
to use the STRATA DK data interface units,
PDIU-DI and PDIU-DS. This includes data
applications such as modem pooling,
printer sharing, PC-to-PC file transfer, etc.
Example 8—A sizable business needs 15 CO
lines, three E&M TIE lines, 37 electronic tele-
phones, two HDSS consoles, four door phones,
three standard telephones, a fax machine, three
modems, Off-hook Call Announce for seven of
the 37 electronic telephones, and three-zone
paging. The business also wishes to use the
Direct Inward System Access (DISA) feature.
•
The four door phones can be supported by
two HDCBs, since each HDCB has a maxi-
mum of three door phone interfaces. Each
HDCB requires one electronic telephone cir-
cuit. Both HDSS consoles require two elec-
tronic telephone circuits. Therefore, includ-
ing the 37 electronic telephone circuits re-
quired for the electronic telephones, the con-
figuration will require PCBs for 43 electronic
telephone circuits. The system will need six
PEKU PCBs to support this number. One of
the PEKUs needs an EOCU PCB to accom-
modate the seven electronic telephones that
will have Off-hook Call Announce. This par-
ticular PEKU cannot interface with an HDSS
console, because the HDSS console inter-
faces as the equivalent of two electronic
telephones, leaving only six circuits for tele-
phones.
•
The equivalent of seven standard telephones
(the three standard phones, the fax machine,
and the three modems) need to be inter-
faced; so only one PSTU is required. A
CRCU PCB will be required for the DISA
feature, since DTMF tones will be coming
into the system. Therefore, the standard
telephones and like devices can use DTMF
without any additional cost. If only one zone
of external paging was needed, a PEPU or
PIOUS PCB could be used to interface with
the paging system. But three zones are re-
quired; so a PIOU PCB must be installed—
the PIOU only supports zone paging. For 15
CO lines, four PCOU PCBs are needed. Only
one PEMU PCB is required for the three TIE
lines.
•
In summary, the total PCB requirement (in
addition to common equipment) is as fol-
lows:
Four PCOU PCBs
One PEMU PCB
Six PEKU PCBs
One PSTU PCB
One PIOU PCB
One EOCU subassembly
One CRCU subassembly
•
A total of 13 universal slots (one for each of
the PCBs) are needed; so a DK96 system
must be used.
2.70 Miscellaneous
2.71 Other hardware items may be needed in a
particular system configuration. These include the