2N StarGate/BlueTower v5.2 User Manual
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PRI1 / PRI2
Channel number select – define the way of occupation of B–channels on a
selected ISDN PRI interface. With the UPWARDS selection, the gateway will
occupy the B–channels upwardly (from the selected B–channel number to the
B–channel 32). With the DOWNWARD selection, the gateway will occupy the
B–channels in the descending order (from the selected B–channel number to
B–channel 1).
Preferred channel – select a B–channel.
Note
The PRI 1 port is always set as internal – the LCR function is
activated. The PRI 2 port is always set as external – all calls
from PRI 2 are rerouted to PRI 1. The PRI 2 port has a mode
opposite to that of the PRI 1 port.
In the case of ISDN port mode change, change the selection of
the ISDN PRI card jumpers, see the PRI Board subsection.
PRI1 and PRI2
TEI address – The Terminal Equipment Identification number for the ISDN PRI
line connected. The TEI must be identical for both devices on one ISDN PRI line.
The default value is 0.
CRC – Enable/disable receiving CRC on Layer 1 on the ISDN PRI interfaces (in
both modes the gateway sends the CRC).
Progress Indicator Value
Define which progress element value will be sent in the selected ISDN messages. The
correct setting of these parameters depends on the current settings of the opposite
device (PBX / Router). This parameter is primarily designed for opening the B–channel
before call connection – transferring call state tones (e.g. ringing tone) from GSM /
UMTS networks. The following table contains common values of progress elements.
Value Meaning
Event
0
No progress element sending
B–channel closed
1
Call is not end–to–end ISDN or may be in–band
information
B–channel
opened
2
Destination call address is non–ISDN
B–channel
opened
3
Origination call address is non–ISDN
B–channel
opened
4
Call has returned to the ISDN
B–channel closed
8
In–band treatment has been applied
B–channel
opened
10
Delay in response at the call interface
B–channel closed
Caution
Wrong settings of these parameters may cause malfunction of
the ISDN PRI line (call connection)!