Comdial SCbus Installing - Page 8

Browse online or download pdf Installing for Conference System Comdial SCbus. Comdial SCbus 10 pages.

Print Page

IMI89–313

Configuring The Clock

For proper operation, you must only configure one SCbus board as the master clock on a given SCbus ribbon

cable. This means that while you must configure one SCbus interface board as a clock master, you also must

configure any other SCbus boards that you connect along the same ribbon cable as clock slaves. This requirement

includes other SCbus interface boards that you install in the Impact FXS telephony portion as well as any SCbus

compatible application boards that you install in the Impact FXS computer portion. You will need to consult the

literature that accompanies the SCbus application boards to learn how to configure them as clock slaves or

masters.

If you configure all the SCbus compatible application boards that you have installed in the Impact FXS telephony

portion as clock slaves, you must configure at least one SCbus compatible application board that you install in the

Impact FXS computer portion as a clock master. That clock configuration arrangement also requires you to make

the following hardware considerations:

•

You must install a T1 Sync card on the Impact FXS AUX board (reset the Impact FXS system after installing

the Sync card to cause the system to recognize it) ,

•

You must configure one of the SCbus interface boards as a clock master,

•

Install the two elastic buffer ICs on each SCbus interface board.

NOTE: Currently, if you have a requirement for this clock configuration, you must obtain from your Comdial

supplier a different SCbus interface board that includes the optional IC chip set.

Further, If you do not properly configure the SCbus clock, the system turns the red SYNC ALARM

indicator on steady.

Configuring The SCbus Interface Board As The Master Clock

As a default, the master clock is disabled on a newly installed SCbus interface board. If you plan for that board to

serve as the master clock you must configure it as such.

1. Start the VMMI programming application.

2. Go to the Board ConfigurationBoard Programming location.

3. Click the SCbus board that you need to configure.

4. From the dialog window for the selected board, select the master clock mode to be enabled or disabled as

needed.

5. Click the Apply button.

8 Programming The System For SCbus Interface Board Operation

Installing The SCbus Interface Board