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Making Two B-Channel Transfers
November 2009 182
Making Two B-Channel Transfers
When making a two B-channel transfer, the central office connects
two outside calls through the central office, freeing the B-channels to
take more calls. You can only transfer calls using two B-channels on
T1 ISDN PRI configurations.
Bfv maintains a maximum of two calls per B-channel. Of these two
calls, only one call is on hold at a time. Bfv provides a hold function
using BfvCallHold in your application:
BfvCallHold(lp, &args);
See page 210 for more information about putting a call on hold using
BSMI.
To configure using the
Brooktrout Configuration Tool (Windows® only):
Set each port’s Protocol Options to T1 ISDN.
Set your network’s Protocol, such as AT&T PUB 41449.
Set your network’s Switch Type, such as AT&T #4 ESS.
Set the Transfer Variant to Two B-Channel.
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 each port 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=att
Set the transfer_variant using the callctrl.cfg configuration
file, set:
transfer_variant=tbct
Set the country code using the btcall.cfg configuration file:
country_code 0010
Country codes are listed in:
C:\Brooktrout\Boston\bfv.api\inc\ccode.h