Section 16: Data Transfer & Using 3
rd
Party Devices
T
ieline
T E C H N O L O G Y
Page 145
16.7.2.
Session Data and Non-Tieline Codecs
Session data is a great tool for programming codecs to operate according to
a series of preset instructions. It makes the operation of
T
ieline
codecs a
simple task and can eliminate the need to adjust codecs each time they are
connected.
Most non-
T
ieline
codecs do not use session data when connecting. As a
result, they will not respond to session data sent by a
T
ieline
codec. Session
data times-out for all connections except X.21, enabling non-
T
ieline
codecs to
connect to a
T
ieline
codec after session data is switched off. You must turn
session data off if connecting to a non-
T
ieline
codec over X.21.
We recommend that it is best to turn off session data if you are connecting
your
T
ieline
codec to a non-
T
ieline
codec over any connection. We also
recommend that you ensure the same algorithm settings are programmed
into both codecs. This will not only reduce the chance of a failed connection,
it will also reduce the time it takes for the two codecs to connect.
If a non-
T
ieline
codec is set to auto-scan for the algorithm used by the codec it
is connecting to, it can take quite some time to connect and in some
situations may fail (this process is called ’framing’ and is when incoming bit
streams are identified and distinguished for decoding).
Whatever you decide to do, we highly recommend you do a test of the
connection well before you go on-air, to ensure your settings are compatible.
16.7.3.
Enabling and Disabling Session Data
Turning session data on and off is a simple task. To configure this setting
press
SOFTKEY 4 Menu
and select [Configuration] > [System Settings] >
[Session Data]. The default setting is
Enable
. Select
Disable
if you wish to
disable this feature.
It is also possible to program session data via
Tool
Box
software. To do this
access the
Unit Options
tab as displayed in the following image. If the check-
box has a tick in it then session data is enabled.
Figure 31: Session Data Check-box in the Unit Options Tab
