Trend AuroraPlus User Guide
4-18 429850
Channel Setup
The ISDN Basic Rate Interface provides for two B Channels
(Bearer Channels) and one D Channel (Demand Channel).
Each multiplexed Bearer Channel can carry either voice or
data information. During setup, you should define the
default channel to make outgoing calls with as B1, B2 or BX.
The D Channel is a fixed physical link and is not definable.
The three channels are:
• B1 (Bearer Channel 1)
• B2 (Bearer Channel 2)
• BX (either Bearer Channel)
The type of services that each channel supports can also be
defined individually. For example, B1 can be set up for voice
communication, and B2 for fax. Where the channel or
service cannot be defined in advance (for example, a cleared
call on B1 with a maintained call on B2 when a subsequent
incoming call is received) then BX can be used to
automatically find the free channel.
Note
Some switches or PBXs do not allow the TE to 'demand' a B
Channel. The TE can only request a channel Bx.
Choose CALLS from the Main Menu to display the following
screen:
Chap04s1.P65 30/04/01, 16:3418
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