Dialogic 6.2 manual Making Two B-Channel Transfers, November 182

Making Two B-Channel Transfers

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

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