Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
57
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.
3 Click “OK”.
Figure 59.
Field name Description
• NT Mode (Network Termination) switches on the NT mode for
layers 1, 2 and 3, see 22.3 The TE and NT modes on
page 154.
• Swap tx/rx Swaps the receive leads. Enable if you use a modified
(crossed) connection cable instead of a standard 1:1
ISDN connection cable.
• 100 Ohm Termination Switches on the bus termination.
• u-law Changes from A-law encoding to µ-law encoding.
• Permanent activation (In TE mode only) activates the line permanently
(clock).
• Loopback Enables the loopback function. This is only necessary
for conformance test purposes.
• Do not use for
synchronization
(visible when NT Mode is
unchecked)
Do not use as a clock source.