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2-26
Chapter 2 - Description and Installation
Signal
CO Line Ringing:
Scheme 0
Scheme 1
Scheme 2
Scheme 3
Distinctive 1
Distinctive 2
Distinctive 3
Distinctive 4
SLT
Intercom Ringing:
Scheme 0
Scheme 1
Scheme 2
Scheme 3
Distinctive 1
Distinctive 2
Distinctive 3
Distinctive 4
SLT
Message Wait Callback
Preparation for DHS-L Installation
Installation Overview
1. Plan the installation, including the KSU and Main Distribution Frame (MDF) location,
station locations, cable runs, and optional equipment.
2. Mount a backboard in the designated MDF location.
3. Mount the KSU on the MDF backboard. Use the provided mounting template to aid in
spacing the mounting screws.
4. Install all PCBs inside the KSU as required.
5. Mount the MDF backboard, then attach the punch-down terminal block(s) to the
backboard.
6. Run cables for the key telephone and single-line telephone locations from the MDF
to each location. No cable should loop from one telephone location to another.
7. Run wiring to any optional equipment, such as external paging equipment, loud bell
signaling devices, music sources, etc.
8. Route telephone and CO line port interface connections through the appropriate
KSU opening, and terminate all industry standard wiring on punch-down terminal
block(s) on the MDF.
Table 2-11: Audible Signals
Frequency
N/A
300 ms On, 400 ms O ff, 300 ms On, 4 seconds O ff
N/A
300 ms On, 400 ms O ff, 300 ms On, 5 seconds O ff
N/A
1 second On, 3 seconds O ff
N/A
1 second On, 2 seconds O ff
SLT bell
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
N/A
1 second On, 4 seconds O ff
N/A
1 second On, 5 seconds O ff
N/A
300 ms On, 400 ms O ff, 300 ms On, 5 seconds O ff
N/A
300 ms On, 400 ms O ff, 300 ms On, 2 seconds O ff
SLT bell
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
Follows ring cadence of Ring Scheme selected
P reparation fo r DHS- L Instal lation
Cadence
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