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Installation and Operation Manual
VoIP Gateway
10
TEL Interface
Note: Not supported by Ascom.
Tel is a BRI interface in TE mode which can be exclusively used as connection for a public
exchange line.
10.1 Physical – Configuration of the Physical TEL Interface
Figure 51. Physical configuration
1
Select TEL > Physical.
2
Select/Enter the following settings.
Field name
• NT Mode
• Swap tx/rx
• 100 Ohm Termination
• u-law
• Permanent activation
• Loopback
• Do not use for
synchronization
(visible when NT Mode is
unchecked)
3
Click "OK".
2009-03-10 / Ver. E
Figure 59.
Description
(Network Termination) switches on the NT mode for
layers 1, 2 and 3, see
page 154.
Swaps the receive leads. Enable if you use a modified
(crossed) connection cable instead of a standard 1:1
ISDN connection cable.
Switches on the bus termination.
Changes from A-law encoding to µ-law encoding.
(In TE mode only) activates the line permanently
(clock).
Enables the loopback function. This is only necessary
for conformance test purposes.
Do not use as a clock source.
TD 92326GB
22.3 The TE and NT modes
on
57
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