Nortel Networks BCM200, 400 4.0 Connecting an external music source, Music-on-hold specifications

Chapter 12 Installing optional telephony equipment 175

Figure 88 Page relay jack

Ring - Page relay output MSC Faceplate

Tip - Page relay output

Page relay

Sleeve - Ground

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.

The BCM system provides paging over the telephone speakers when there is no external paging equipment.

4Select the appropriate option for your system:

•If you are adding more auxiliary equipment, proceed to “Connecting an external music source” on page 175.

•If you are finished adding auxiliary equipment, proceed to “Next step” on page 176.

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.

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.

•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.

•The maximum non-clipped input level is 1 V rms.

•The interface is protected against ringing cross.

BCM200/400 4.0 Installation and Maintenance Guide