Demand test descriptions and error codes - Avaya Support

TDM-BUS (TDM Bus)
Description
MO Name Alarm Level Initial Command to Run 1
TDM-BUS MAJ
MIN
WRN
1. P is the port network number. Use list cabinet to find the port network(s)
contained in a cabinet.
Each port network has a pair of TDM buses, designated TDM bus A and TDM bus B, each with
256 time slots. This division allows for duplication of control chels and dedicated tone time slots.
The first five time slots on each bus are reserved for the control chel, which is active on only one
bus at a time in each port network. The next 17 time slots are reserved for system tones such as
dial tone, busy tone and so on. As with the control chel, these time slots are active on only one
bus, A or B, at a time. The rest of the time slots on each bus are for general system use such as
carrying call-associated voice data. The 17 dedicated tone time slots that are inactive can also
be used for call processing when every other available time slot is in use.
When the system initializes, the control chel is on TDM bus A and the dedicated tones on TDM
bus B in each port network. If a failure occurs on one of the two buses, the system will switch
any control, tone and traffic chels to the other bus. Service will still be provided, though at a
reduced capacity.
The set tdm PC command has the effect of putting both the control chel and tone time slots
on a specified bus, A or B. P specifies the port network’s number, and C specifies the TDM bus,
A or B. Throughout this discussion, PC refers to a specific TDM bus. References to port circuit
packs include every circuit pack that terminates on the TDM bus, including the Expansion
Interface TN570, and the following service circuit port boards: Call Classifier (TN744),
Integrated announcement (TN750), Maintenance/Test (TN771), Speech Synthesizer (TN725B),
Tone Detector (TN748 or TN420). Other terms used are:
● Control Chel Bus: the TDM bus carrying the active control chel
● Non-Control Chel Bus: the TDM bus with the inactive control chel
● Tone Bus: the TDM bus carrying the active tone time slots
● Non-Tone Bus: the TDM bus with the inactive tone time slots
952 Maintenance Alarms for Communication Manager, Media Gateways and Servers
Full Name of MO
test tdm P TDM bus