Features and Specifications Manual D - 49
Door Lock Release Relays
D-16
FEATURE
DESCRIPTION
The DPH(4)-U10 ETU provides four doorphones and four Door Lock Release
Relays. While a station user is talking to a Doorphone, an Access Code can
be dialed to operate the relay associated with that Doorphone.
The time the door lock release is active depends on the digit code dialed.
SYSTEM
AVAILABILITY
Terminal Type:
All Multiline Terminals
Required Components:
DPH(4)-U10 ETU
DP-D-1A Doorphone
OPERATING
PROCEDURES
1. Dial a single digit code
B
~
I
to control the door-to-lock
release make time.
Note: Make means shorted or closed.
2. Dial a single digit code
A
or
J
to make the relay break
again. This step is optional as the relay breaks after some time
anyway (controlled in step 1).
While a Multiline Terminal is connected to a Doorphone:
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