Station Apparatus
Standard Telephones
Strata CTX I&M 10/02 8-29
Station Apparatus
Standard Telephones
This section explains how to connect standard telephones to the Strata CTX670 system. Toshiba
does not provide standard telephones. Whenever standard telephones are mentioned in this
manual, it refers to 500- and 2500-type standard telephones.
Note Before proceeding, see warning and caution notes in “Telephone Installation” on page 8-2.
Standard telephones connect to circuits on the Standard Telephone Interface PCBs: RSTU,
RSTU2, RDSU/RSTS and PSTU via the MDF with standard twisted-pair jacketed telephone
cable. (See single-pair wiring in Chapter 7 – MDF PCB Wiring for more details.)
The standard telephone cable’s overall loop resistance, connected on- or off-premises, is 300 ohms
max. for PSTU; 600 ohms for RSTU and RDSU/RSTS with -24VDC (no R48S), and 1200 ohms
for RSTU and RDSU/RSTS with -48VDC (R48S installed on RSTU, RSTU2, or RDSU PCB),
including telephone resistance. This applies to all devices connected to standard telephone circuits.
A standard telephone connected off-premises via the telephone network should interface with
OL13A, OL13B, or OL13C lines (or equivalent) and connect to an RJ21X, FIC jack or equivalent.
Cordless Digital Telephones
Toshiba offers two cordless digital telephone models, the
DKT2104-CT and the DKT2004-CT. The compact designs of
these cordless digital telephones bring mobility and productivity
to office telephones.
Both the DKT2104-CT and DKT2004-CT feature digital 900
MHz technology and represent state-of-the-art design and
engineering.
The DKT2104-CT and DKT2004-CT telephones can be attached
to a Toshiba DKT3000- or 2000-series corded digital telephone
or used as a stand-alone. The cordless telephones can operate
from the same digital station port on the BDKU or PDKU2 as the
digital telephone, which may or may not be attached. They
cannot receive Group Pages or All Call Pages.
DKT3000 telephones must be set to operate in the DKT2000 mode when used with the DKT2104-
CT and DKT2004-CT (see “DKT2000 Mode On/Off” on page 8-17).
Cordless Telephone Compatibility
The chart below shows the compatibility of Strata DKT2004-CT and DKT2104-CT with Strata
CTX digital line cards. The BDKU PCB has a switch for BDKU or PDKU mode. A “standalone”
cordless phone connects directly to a digital line circuit without an associated DKT.
Notes
1. DKT3000 can operate in DKT2000 mode only.
2. DKT3000 must be put in DKT2000 mode from Telephone Programming Mode A as described,
in part, below. The remaining circuits on the BDKU can operate in BDKU mode.
Telephones
PDKU BDKU in PDKU Mode BDKU
DKT2004-CT
or
DKT 2104-CT
w/ DKT2000 Yes Yes Yes
w/ DKT3000 Note 1 Note 1 Note 2
Standalone Yes Yes No
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