Nortel DMS-100 Series Maintenance Manual page 139

– regular
– automatic line
– revertive
– hunt group
– reorder termination
– busy
— Terminator line character: The byte is the result of the digit
translation.
— Terminator ring character: The byte contains the ringing
characteristics as a result of digit translation.
— Originator revertive ring character: The byte contains the ringing
characteristics of digit translation.
— Originator, terminator, DTR: the channel numbers of the three types
of terminals that use channels in an active call.
— Translation and audit-specific data: the data that translations use as
flags for audits on a CPB during the digit collection phase.
Call channel management
The calls at an RLCM in ESA mode are intra- or interswitched. An intra- or
interswitched channel is required to complete a call. If an intra- or
interswitched channel is not available, the TPT sends a channel-blocking
message to the ESA CC. The originator of the call receives a reorder tone.
Digitone receiver management
The ESA processor must have the location of DTRs in the RMM. The
system downloads the DTR data with the static data. Because digitone
receivers are allocated in a round fashion, receivers get equal distribution.
The following steps explain the use of a receiver.
1 When a line goes off-hook to originate a call, a receiver is requested.
2 If the system finds an unassigned receiver, the receiver is marked, not
free, and is assigned to the call.
If every receiver is assigned, the system waits 3 s to locate a free
receiver. If after 3 s the system cannot locate a free receiver, the line
goes to the abandon state.
3 After the subscriber dials the digits, the receiver is marked free. The
receiver is unassigned and ready for use by another call.
The system also frees a receiver when the system receives a dial pulse (DP)
digit. The system can receive a DP digit when a DP phone is used on a line
DMS-100 Family RLCM Maintenance Manual XPM12 and up
ESA maintenance overview 3-17