Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
52
3 Click “OK”.
9.1.1 Protocol – Selection of Signalling Protocol
1 Select PRIn > Protocol.
The GUI and protocol options are dependent on the setup; with or without CAS.
With CAS:
Figure 46. Selection of protocol with CAS
Without CAS:
Figure 47. Selection of protocol without CAS
2 Select/Enter the following settings.
• CAS Enables CAS signalling. The VoIP Gateway is prepared to
support CAS as T1-CAS and E1-CAS. In CAS each traffic
channel has a dedicated signalling channel. In other
words the signalling for a particular traffic circuit is
permanently associated with that circuit.
Note: In T1 mode with CAS, only EMN Wink Start is
used.
• No CRC4 Switches off the generation of CRC4 checksums.
• Activate "power off
loop" relay
Manually switches on the internal relay connecting PRI1
and PRI2 or PRI 3 and PRI4.
• Loopback Used for diagnostics, switches on a loopback on the
interface (everything is echoed back).
• TxLevel for T1 mode
(visible if T1 is checked)
The TX level can be set to 0, 7.5 or 15 dB
• Send flags on FDL
(visible if T1 is checked)
Transmits FDL messages (Facility Data Link). The T1 link
management protocol AT&T TR 54016 needs flags on
the FDL to work reliable.
Figure 54.
Figure 55.
Field name Description
• Protocol Selection of signalling protocol in the drop-down list, see
22.4 The Signalling Protocols on page 155.
• Assign Channels from
Top
Assigns the B channels from top to bottom;
recommended if the interface is operated in TE mode.
See 22.5 The Assignment of B Channel Numbers for PRI
Connections on page 156.