Section 11: ISDN Operation
T
ieline
Page 87
T E C H N O L O G Y
11.4.8.
Testing the ISDN Line Type
With an ISDN line connected to the codec
ISDN
Sync
should be displayed. This appears
regardless of whether you have the ‘ISDN Line
Type’ set correctly. To test whether you have
the correct ‘ISDN Line Type’ selected simply
dial your own number.
•
Rotate the
MENU SELECTOR
until
‘ISDN1……’ is surrounded by square
braces I.e. [ISDN1< Enter# Sync]
•
Enter the number to be dialed using the
numeric keypad
•
Press the
Enter/Dial
button to dial the
connection.
This will perform a loopback test by dialing out on the main ISDN number
and receiving on the auxiliary ISDN number
If this results in a ‘Disconnect: 1’ message being displayed, change the ‘ISDN
Line Type’ to the other option. For example, if ‘P-Point’ was selected change
to ‘P-Multi’. Redialing your own number again will result in the following
screen with a mix of the inputs received on the ‘De 02’ (Decoder 2) PPM.
11.4.9.
On Demand
If
Sync
appears for approximately 60 seconds upon initial connection of the
ISDN line and then disappears, or if
Sync
does not appear and you know
you are connected to an active ISDN interface, then it may have ‘On
Demand’ enabled by the network service provider. To test this, dial a codec
on a known working ISDN line.
Rotate the
MENU SELECTOR
until ISDN1 is surrounded by square braces,
i.e. [ISDN1< Enter#].
•
Enter the number using the numeric keypad.
•
Press the
Enter/Dial
button to dial the connection.
•
If
Sync
now appears beside the second ISDN connection this indicates
the service has now been activated.
•
Immediately disconnect the call by pressing the
Hang Up
button then
SOFTKEY 4
Yes
to confirm the hang up.
•
Dial again.
•
If this dial is successful ‘On Demand’ is enabled. We recommend you
contact your network service provider to have ‘On Demand’ disabled
where possible to alleviate future issues.
