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Transferring Calls Using Release Link Trunk Transfer
November 2009 202
Transferring Calls Using Release Link Trunk Transfer
Release Link Trunk is an explicit call transfer method for Nortel
DMS-250 switches and is only available for Nortel switches.
The host application initiates the Release Link Trunk (RLT) action,
but the call transfer is completed within the public switch network.
Calls come into the network on two B-channels. Each channel
maintains its call and both channels are busy. When the call
finishes, the B-channels are torn down.
Using Bfv Applications
Set Release Link Trunk in your Bfv application using the
BfvLineTransfer argument:
args.lp_second_Channel
A zero (0) value transfers calls over a single channel, such as an
analog line.
To configure using the
Brooktrout Configuration Tool (Windows® only):
Set each port’s Protocol Options to T1 ISDN.
Set the Protocol to Northern Telecom NIS A211-1.
Set the Switch Type to Northern Telecom DMS-250.
Set the Transfer Variant to Release Link Trunk (DMS-100 or
DMS-250)
.
Set the country_code in BTCall Parameters to 0010 (US).
Country codes are listed in:
C:\Brooktrout\Boston\bfv.api\inc\ccode.h
Note: You must be in Advanced Mode in the Brooktrout Configuration
Tool
to configure BTCall Parameters.
To configure using configuration files:
Set the port configuration using the callctrl.cfg configuration file:
port_config=t1_isdn
Set the protocol using the callctrl.cfg configuration file:
protocol=nortel