Step 10.
Installation
If the key system uses
K4OOE Line Cards,
install a 2.2
Meg
resistor as
shown in the 4OOE
Line Card
Modification
figure below.
If this is not done, the key phone may continue to ring after callers have hung-up.
The key system times ringing from one burst to the next in order to apply its own
properly timed ringing signal. The timer is typically set to about 10 to
15
seconds al-
though only
5
seconds is sufficient. If the timer period is too long, there will be a
delay in detecting when ringing stops, resulting in a continued ring from the key
system. The 1 Meg resistor decreases the timer period, causing quicker timeout and
ring-stop detection. This delay is most noticeable when using the TCIV built-in Night
Answer to pick-up a call from a key phone.
Step 11. Install a Ring
Trip Adapter
between the LLM “Ul” line hybrid and its socket on key phone
lines. Refer to drawing KMO867.
If this is not done, there may be a “ringing in
the ear”
caused by pressing a line
button to answer an incoming call while holding the handset to the ear or wearing a
headset. This may be objectionable.
K4OOE Line Card Modification
Jumpers across
terminals 7 and 10 and
terminals 5 and 8.
K4OOE Line Card
op View - Not all components shown.)
RELAY
2.2 M (l/4 watt) resistor inserted across
terminals 1-2 and 3-4 after removal of
jumper across terminals l-2 and 3-4.
© 1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)
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