ISDN Compatibility - ISDN 2 B-Channel
Transfer
Description
This ISDN PRI 2 B-Channel Transfer feature allows the system to receive a call on one B-Channel
and transfer it back out on a second B-Channel (Trunk-to-Trunk transfer on the Telco side). When the
transferred call connects, both of the B-Channels are then released and available for either making or
receiving another call. This feature provides more efficient use of B Channels on an ISDN PRI by
allowing a customer to transfer calls without tying up their B Channels for the duration of the call.
Conditions
• The bearer capability of two calls must be “Speech, 3.1-kHz Audio, Unrestricted Digital Information”
or compatible.
• This feature is not supported with Automatic Transfer.
• This feature is not supported with Unsupervised Conference.
• This feature is only supported with a Manual Transfer.
• This feature is only supported when both trunks are ISDN/PRI and the bearer capability of the two
trunks meet the same service requirements.
• Trunk-to-Trunk programming must be enabled for this feature to work.
• Both ISDN/PRI trunks must reside in the same system for this feature to work.
• This feature is available if the Telco Service Provider supports this feature.
• This feature is available in the following case:
At least one call to be transferred is:
- answered (outgoing from the System)
- answered (incoming to the System)
And the other call is:
- answered (outgoing from the System)
- answered (incoming to the System)
Default Settings
None
System Availability
Terminals
All Terminals
Required Component(s)
To provide ISDN-PRI trunk connection:
• PRI
SL1100
ISSUE 2.0
1-474
ISDN Compatibility - ISDN 2 B-Channel Transfer
I
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