Toshiba Strata DK 24, Руководство по установке и обслуживанию

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4-10
INSTALLATION-CONFIGURATION
SECTION 400-096-204
SEPTEMBER 1992
DPFT power failure transfer unit, used to connect
CO lines to standard telephones in the event of a
power outage; the HESB speaker/amplifier, which
may interface with a digital or electronic telephone
for the Loud Ringing Bell feature and/or a headset;
a PBTC-3M cable, for connection to batteries for
reserve power; a PPTC connector for an SMDR
printer, TTY, or remote maintenance terminal inter-
face. More details on these miscellaneous items
can be found in Tables 4-E and 4-F, the
General
Description, and other installation chapters.
2.80 System Ports
2.81 Station Ports. Interfaces to each of some
devices (such as telephones) in the STRATA DK
system can be referred to as ports. Therefore, a
PEKU, PDKU, PSTU, and PESU PCB can be said
to have station ports. STRATA DK system pro-
gramming uses port numbers to identify which
device will be equipped with desired features or
operation. Ports range from 00 ~ 95 with all of the
PCTU versions, and 00 ~ 23 with PCTUS. Port 00
is usually intercom station 200, and is designated
as the primary system attendant station. Intercom
numbering can be completely flexibly assigned, but
is best left to the consecutive standard numbering
of 200 ~ 295 with PCTU (1, 2, 3, and 4) and 200 ~
223 with PCTUS. User guides are written using this
standard plan, and LCD digital and electronic tele-
phone busy fields will be meaningful only if the last
two digits of the intercom number are consecutive,
starting with 00.
NOTES:
1. Each PEMU uses four station ports and
four CO lines; however, if the PEMU is
installed in a DK24 with a PCTUS PCB,
only 16 station ports are available, be-
cause the PCTUS assigns eight station
ports to the PEMU PCB.
2. Each PESU provides two standard and
four electronic telephone ports for a total
of six station ports; however, two nonfunc-
tioning ports (circuits 3 and 4) are auto-
matically assigned to the PESU so a total
of eight station ports are allocated to each
PESU PCB installed.
2.82 CO Lines. Telephone network CO lines inter-
face to the PCOU PCB, which has four circuits. These
circuits are identified as CO lines in DK system soft-
ware and are not considered as ports. When determin-
ing the total station count for a configuration, do not
include CO lines as stations.
NOTE:
Each PEMU uses four CO lines in system soft-
ware, as well as four ports (PCTU1, 2, 3 or 4) or
eight ports (with PCTUS) in system software.
3 WORKSHEETS