Power Failure Interface; Music-On-Hold Interface; Expansion Ksu Architecture - Toshiba Strata DK14 General Description Manual

Strata DK40i

Expansion KSU Architecture

Table 6 Typical Reserve Power Duration Estimates
Approximate (-24V) current drain (DC amps.)
Estimated battery operation time (in hours)
Reserve power time estimates assume the following:
• Batteries are fully charged at start of operation and two batteries are connected in a series (12 VDC, rated 80 amp/hours each).
• Batteries used for this test are gel-cell and maintenance free. Reserve duration will vary depending upon battery type, age, and
manufacturer. These figures should be used as an estimate.
• AC power must be available when first installing reserve power batteries.

Power Failure Interface

The Base KSU provides an interface for a dedicated backup standard telephone during an AC
input power failure. If the system AC input power fails, the backup telephone automatically
connects to the CO1 line. The backup telephone is disabled when the system operates during
normal power conditions.
This feature is independent of Battery Backup and is available when loop start lines are installed in
the Base KSU. A power failure telephone cannot be installed for DID lines.

Music-on-Hold Interface

Customers can connect their own MOH source to this interface. The source can also feed external
page speakers and telephone speakers with BGM.
Paging Interface – This 600-ohm interface supports a Toshiba External Speaker (HESB) or a
customer-supplied amplifier and speaker for Paging, Night Ringing over Page, and BGM.
Flexible Relay Contacts – A relay contact can be programmed to either mute BGM during a
page announcement over external speakers, to operate a device: i.e., an answering machine or
ringing bell during the Night Mode, or to provide on-off control for a MOH source.
Expansion KSU Architecture
The optional Expansion KSU, which attaches
easily to the side of the Base KSU, offers four
universal slots that can host a variety of line and
telephone PCBs (see
Universal Slot PCBs
14
Description
Figure 7). See
for descriptions of PCBs.
DK40i Base KSU
No KSTU2 KSTU2
1.0 1.2
75.0 58.0
Chapter 4 –
Side
Cover
Figure 7
DK40i Expansion KSU
1 PCB 2 PCBs 3 PCBs
1.6 2.0 2.4
41.0 31.0 25.0
Strata DK40i
Base KSU
Strata DK40i
Expansion KSU
Expansion
PCB Slots
Expansion Cover
4243
Expansion KSU Interior
Strata DK General Description
4 PCBs
2.8
20.0
5/99