Amtelco infinity series - Slave Mode; Primary Master Mode

The H.110 Bus & Clock Modes • 6-3 •
The H.110 Basic Rate ISDN Board
6.2.1 Slave Mode
In the Slave Mode, the H.110 Basic Rate ISDN Board derives its clocks
from one of the clock signals on the CT bus. The clock signal is selected
with the submode argument in the SC command. The possible clock
signals are:
0 - CT bus clock A
1 - CT bus clock B
6 - CT bus clock A, auto-fallback mode
7 - CT bus clock B, auto-fallback mode
Argument a is used to set the CT_NETREF mode, while argument bb is
used to select the source of CT_NETREF. The choices for argument a are:
0 - No CT_NETREF output
1 - CT_NETREF_1 output is enabled
2 - CT_NETREF_2 output is enabled
It should be noted that CT_NETREF_2 is defined only for the H.110 bus
and not the H.100 bus. The CT_NETREF source is specified by argument
bb, and can be any of the Basic Rate ISDN interfaces that is operating as
TE (terminal equipment).
6.2.2 Primary Master Mode
In modes 2 or 3, the board supplies the CT master clocks A or B
respectively. Other boards on the H.110 bus will synchronize to one of
these clocks. The source of the clock is selected by the submode argument
s. The choices are:
0 - freerun, the board’s internal clock
1 - CT_NETREF_1
2 - CT_NETREF_2 (not present on the H.100 bus)
3 - a local network, any TE BRI interface
4 - a local network (TE port) with auto-fallback to CT_NETREF_1