Nortel Networks 400 4.0 Benutzerhandbuch
Chapter 12 Installing optional telephony equipment
175
BCM200/400 4.0 Installation and Maintenance Guide
Figure 88 Page relay jack
4
Select the appropriate option for your system:
•
If you are adding more auxiliary equipment, proceed to
•
If you are finished adding auxiliary equipment, proceed to
.
Connecting an external music source
Use this procedure to connect an external music source to the BCM system. You can use any
customer-supplied, approved, low power device as a music source. A music source includes
equipment such as a radio with a high-impedance earphone jack.
customer-supplied, approved, low power device as a music source. A music source includes
equipment such as a radio with a high-impedance earphone jack.
Music-on-hold specifications
Ensure that the music source follows these guidelines:
•
Nominal input impedance is 3.3 kilohms.
•
Nominal sensitivity of this interface returned to digital encoded PCM is
-22 dBm0 for a 0.25 V rms input signal.
-22 dBm0 for a 0.25 V rms input signal.
•
The input is limited so that the encoded analog content at the digital interface to the network
does not exceed -12 dBm when averaged over any 3-second interval.
does not exceed -12 dBm when averaged over any 3-second interval.
•
The maximum non-clipped input level is 1 V rms.
•
The interface is protected against ringing cross.
Warning: The paging connections must not be connected to exposed plant.
Tip: Paging tips
BCM external paging does not support talk-back paging equipment unless you use an
external line port.
external line port.
The BCM system provides paging over the telephone speakers when there is no external
paging equipment.
paging equipment.
Page relay
MSC Faceplate
Ring
- Page relay output
Tip
- Page relay output
Sleeve
- Ground