User guide

74 AltiWare ACC 5.1 Administration Manual
CT-Bus Configurations
To set the CT-BUS configurations, select System > CT-Bus Configuration. The
following dialog box opens:
Set the CT-Bus Mode and the CT-Bus Clock, and click Apply.
Parameter Description
CT-Bus Mode The CT-Bus is the telephony switching bus that
connects all telephony boards inside each
gateway. It can be set as Mu-Law or A-Law. The
default is Mu-Law for North America. For
European countries and regions that are using
E1 digital trunk, this setting needs to be changed
to A-Law.
Set CT Bus Clock This parameter determines which telephony
board will provide the clock signal for the TDM
bus. If you don't have multiple T1 or E1 boards
in a gateway, the default Auto setting is
recommended. The system will find the
appropriate board to supply the clock. If you
have multiple T1 or E1 boards in a gateway, the
system will automatically select the one with the
lowest logical board ID as the clock source.
However, in some circumstances, you may need
to manually change to other boards. For
example:
1. If multiple T1/E1 boards are in the gateway
and the T1/E1 board that has been selected
automatically is not active.
2. If the T1/E1 board that has been selected
automatically is set up as a tie trunk to
another system, and the T1/E1 connecting to
the CO is on the other board.