Figure 5-34 Dph(4)-U10 Etu - NEC Electra Elite 192 Hardware Manual

Issue 6
5 - 60
5.3 DPH(4)-U10 ETU
5.3.1 Description
The DPH(4)-U10 ETU provides connection for four
Doorphones (DP-D-1A), and also provides the associated
four Door Lock Release relays.
Doorphones and relays are paired together so that a
station user talking into a doorphone, controls only that
Door Lock Release relay when the feature code is dialed.
The DPH(4)-U10 has two audio paths to be shared by
four doorphones. Two simultaneous doorphone calls are
allowed. Doorphones 1/3 and 2/4 are paired together.
5.3.2 Installation
Only one DPH(4)-U10 ETU can be installed in any S1~S8
slot in any system KSU.

Figure 5-34 DPH(4)-U10 ETU

Installing Electronic Telephone Units
Electra Elite