Codec Tieline Gateway User Manual page 192

192 Gateway and Gateway 4 Manual v1.2
Answering both Tieline Session and Sessionless ISDN Calls
Leave the Sessionless Only check-box in the ISDN Answering Config unchecked if the codec is
expected to receive ISDN calls from Tieline codecs, or both Tieline and non-Tieline codecs (i.e. you
are not sure which type of codec may call). In this mode, when the codec answers a call it initially
expects to receive Tieline session data from the dialing codec and configure its own algorithm
settings according to that. If it fails to receive Tieline session data within 5 seconds (i.e. a non-
Tieline codec is calling, or a Tieline codec with session data disabled), it will use the settings in the
ISDN Answering Config instead.
The following image displays how the answering codec will behave in this mode when receiving calls
from both Tieline and non-Tieline codecs.
Allow Answering of Sessionless ISDN Calls Only
Select Sessionless Only when answering ISDN calls from non-Tieline codecs only. When
Sessionless Only is selected, the codec will not wait to receive the Tieline session data. This
reduces the time taken to answer an inbound sessionless call.
The following image displays how the answering codec will respond with Sessionless Only
selected, i.e. calls from both Tieline and non-Tieline codecs are always regarded as sessionless.
Default Answering Settings
When a B channel is not associated with a Config it inherits the following default settings:
· Tieline Session
· Unbonded
· G.722 algorithm
· Audio route: None
© Tieline Research Pty. Ltd. 2021