Nortel Enterprise 1000 Reference Manual page 81

Analog Trunk Cards - NT8D14 Universal Trunk Card Page 81 of 236
Multi-Channel RAN modes
In Multi-Channel RAN, multiple RAN channels can be configured within one
RAN trunk route. In a Multi-Channel RAN route, each trunk has its own
dedicated RAN channel on a physical RAN machine. Multi-Channel RAN
routes do not support the cross connecting (daisy chains) of multiple trunk
ports together so that several callers hear the same RAN message.
The new multi-channel machine types – Continuous Mode Multi-Channel
(MCON), Pulse Start/Stop Multi-Channel (MPUL) and Level Start/Stop
Multi-Channel (MLVL) – are not linked to a RAN machine or a given trunk.
All trunks belonging to the RAN route are considered independent. RAN
trunks and RAN machine channels are connected one-to-one. If one RAN
trunk is detected as faulty, then all other trunks are not impacted.
For the new RAN machine types, the maximum length of the recorded
announcement is two hours. The meaning of a ground signal received from
the RAN machine (play or idle) is configured in LD 16.
Multi-Channel Level Start/Control Mode (minimum vintage BA)
A RAN mode of operation is available called "Multi-Channel Level Start/
Control Mode." This mode allows provisioning of multiple RAN channels for
a RAN route (playing the same message independently on demand) cross-
connected one-to-one to each RAN trunk in a multi-channel level start RAN
route. Do not bridge RAN trunks in a multi-channel RAN route.
The Route Data Block LD 16 is used to configure a RAN route in Multi-
Channel Level Start/Control mode, using the following response:
(RTYP = MLSS).
Trunk members are provisioned in the Trunk Data Block LD 14.
Refer to "Programming RAN trunks" on page 83 and to the Succession
Communication Server for Enterprise 1000 X21 Software Input/Output
Guide Administration (553-3023-311) for instructions on service change
programs.
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide