Nortel DMS-100 Series Maintenance Manual page 146

Remote line concentrating module

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Table of Contents

3-24 ESA maintenance overview

RLCM ESA tones

receive path to a port that provides idle tone.

Providing tones

The following steps provide tone to a subscriber:

1 The ESA processor sends a start-cadence message to the ESA clock and

2 On receipt of the start cadence message, the ESA clock and tone card

The following steps clear the tone:

1 The ESA processor sends a stop-cadence message to the ESA clock and

2 On receipt of the stop cadence message, the ESA clock and tone card

297–8351–550 Standard 04.01 August 1999

Idle tone uses a start-cadence message, but the RLCM connects the

tone card. This message specifies the tone required, the terminal

identification and the cadence times.

perform the following:

a. If necessary, the current receive path connection of the terminal is

b. The receive path of the terminal connects to the appropriate port.

c. The specified cadence for that tone is set up.

tone card. This message specifies the terminal identification.

send stop-cadence messages to the LCM. The LCM must disconnect the

terminal connection to the correct port and channel 16.

Channel appearance

Cadence (in seconds)

Troubleshooting