NEC nd-20292 manual External Paging, Background Music / Delay Announcement

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.

270.4EXTERNAL TONE RINGING / NIGHT CHIME

External tone ringing is available when the ECR-E
ETU is installed.	The ECR-E ETU provides	a

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