Toshiba Strata DK 24, Installation And Maintenance Manual

Page: 148 / 372

INSTALLATION-TELEPHONE
SECTION 400-096-207
SEPTEMBER 1992
7-2
the cable should be terminated in a modular sta-
tion connector block (RJ-11) at the station location.
The standard single-pair, modular digital telephone
cord that is sent with the telephone is 7 feet (the
maximum allowed is 25 feet).
NOTES:
1 Digital telephone cable runs must not
have the following:
•
Cable splits (single or double)
•
Cable bridges (of any length)
•
High resistance or faulty cable splices
2. See Section 400-096-209 for secondary
protector information.
2.20 Connecting Electronic Telephones to
the System
2.21 The following provides information on how
to connect electronic telephones to the system.
NOTE:
Before proceeding, see warning and caution
notes in Paragraph 2.00.
2.22 Electronic telephones are connected to elec-
tronic telephone circuits on the Electronic Tele-
phone Interface Unit (PEKU) and the Standard/
Electronic Telephone Interface Unit (PESU) via
the main distribution frame (MDF) with standard
twisted-pair jacketed telephone cable. Two-pair
wiring, as a minimum, is required for telephone
connection. However, three-pair wiring is recom-
mended to permit future upgrades, such as Off-
hook Call Announce.
To accommodate the electronic telephone line
cord, the cable should be terminated in a modular
station connector block (RJ-11) at the station loca-
tion. The standard two-pair modular electronic
telephone cord length is seven feet (the maximum
allowed length is 25 feet). See Wiring Diagrams,
Section 400-096-209 for more details.
NOTE:
See Section 400-096-209 for secondary pro-
tector information.
The overall length of the station cable run from the
key service unit (KSU) to the telephone must not
exceed 1,000 feet (305 meters), if using 24 AWG
cable.
2.30 Connecting Standard Telephones to the
System
2.31 The following provides information on how to
connect standard telephones to the system.
NOTE:
Before proceeding, see warning and caution
notes in Paragraph 2.00.
2.32 Standard telephones connect to standard
telephone circuits on the Standard Telephone
Interface Unit (PSTU) and the Standard/Electronic
Telephone Interface Unit (PESU) via the main
distribution frame (MDF) with standard twisted-
pair jacketed telephone cable. Single-pair wiring is
required. (Refer to Wiring Diagrams, Section 400-
096-209, for more details.)
NOTE:
See Section 400-096-209 for secondary pro-
tector information.
The standard telephone cable's overall loop resis-
tance, connected on- or off-premises, is 300 ohms
maximum, including the telephone resistance. This
also applies to all devices connected to standard
telephone circuits. A standard telephone connected
off-premises via the telephone network should
interface with OL13A lines (or equivalent) and
connect to an RJ21X FIC jack (or equivalent).
2.40 Telephone Wall Mounting
2.41 This section provides instructions on how to
mount digital telephones and electronic telephones
to a wall or other vertical surface. Instructions on
mounting standard telephones are not provided
here; refer to the manufacturer's documentation
for those instructions.
2.42 Mount digital and electronic telephones in
accordance with the following steps:
NOTES:
1. Digital telephones equipped with Inte-