Toshiba Strata CT, Installation & Maintenance Manual

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Station Apparatus
5-16
Strata CT I&M Manual October 2000
External Power Straps
Digital telephones equipped with options such as integrated data interface units and ADMs
require two-pair wiring or external power to operate efficiently at the maximum-allowed
distance from the KSU. Two-pair wiring or external power is also necessary for maximum
cable run lengths for digital telephones that are connected to systems that must operate with
reserve power.
Each digital telephone has two external power straps which must be cut for external power
when the cabling of the telephone is connected to an external AC/DC power supply.
➤
To cut the straps
See Figures 5-1 and 5-7 ~ 5-8 and follow these steps:
1. Loosen the four captive screws on the telephone base and remove the base.
2. Depending on the telephone, locate the W101 and W102 external power straps and cut
them.
3. Reinstall the telephone base, and secure it with its four captive screws.
DKT2000 ADM Installation
See “Digital Add-on Module Installation” on Page 5-26 for more information. .
Electronic Telephone Upgrades
This section describes how to upgrade and configure electronic telephones for features and
options.
Off-hook Call Announce Upgrade (HVSU2 or HVSU/HVSI)
Electronic telephones must be equipped with either the HVSU2 subassembly or the
combined HVSU and HVSI subassemblies to receive Speaker Off-hook Call Announce
(OCA) calls. These telephones also require three-pair wiring to receive speaker OCA, instead
of the standard two-pair. Telephones making speaker OCA calls do not require an upgrade or
extra wire pair.
Notes
●
Handset OCA is not available on electronic telephones.
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