user manual

ND-20292
CHAPTER 2
APRIL, 1990
Figure 200-50 MOH Cable Shield Ground Exposed
I. The ring tongue type connector installed in Step
E must be connected to the screw holding the
PSE-AD-1 PSU. Refer to Figure 200-52 showing
a suggested connection.
le TLW-E ‘MOH’
Figure 200-51
MOH Cable Shield Ground (Views of
the ESE-32B-1 CCU)
270.2 EXTERNAL PAGING
Audio output for external paging is available at the
phono jack EP on the TSW-E( 1 ETU. Shielded audio
cable should be used for external paging audio
connections.
The ECR-E ETU provides three contact closures, one
per zone, for use in zone paging with meet-me answer.
These contacts are labeled EPC 1A and EPC 1B
through EPC 3A and EPC 3B. A maximum of one “:
ECR-E ETU can be installed in a system providing a
<?
total of three paging zones.
It is necessary for the audio output to be connected to a
locally provided amplifier and speaker(s), which are
connected to the output of the amplifier via control
relays, also locally provided. If the amplifier is a both
way amplifier, two way paging is available. For
connection information to a locally provided amplifier,
refer to Figure 200-52. For external paging audio
output level and impedance, refer to Section 220.20 of
this document.
With a locally provided amplifier, only one zone of
paging and no background music, the ECR-E ETU is
not required. The ECR-E ETU is required to provide
control of the external switching for applications with
more than one zone of paging or background music.
When External Paging is answered, by meet-me
answer, the external paging audio circuit, in the TSW-
E( 1 ETU and the control circuits in the ECR-E ETU,
are released to allow access for another page.
Never connect the amplifier output directly to the
ECR-E ETU relay contacts. Crosstalk between line
telephones and/or outside lines and the paging circuit
may occur.
270.3 BACKGROUND MUSIC / DELAY
ANNOUNCEMENT
A.
BGM via External Speaker(s) is available if the
ECR-E ETU is installed. A BGM source, an
amplifier for BGM and external speaker(s) should
be locally provided. For connection information,
refer to Figure 200-52.
B.
BGM via Multiline Terminal Speakers is
available if the ECR-E ETU is installed. A
maximum of two BGM sources can be connected
to the phono jacks, (designated JK2 and JK3),
provided on the ECR-E ETU. JK2 and JK3 can
be alternately used to connect a Delay
Announcement machine when UCD is required
in the system. Shielded audio cable should be
used for BGM audio connections. For BGM and
Delay Announcement sources’ output level and
impedance, refer to Section 220.20 of this
document.
270.4
EXTERNAL TONE RINGING / NIGHT
.. .
CHIME
1,
External tone ringing is available when the ECR-E ”
ETU is installed. The ECR-E ETU provides a
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