Installation examples – 2N StarGate/BlueTower v5.2 User Manual
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Interface
ISDN PRI (E1 frame)
Signalling
Q.931 – EDSS1
Signalling channel
(D–channel)
16.
Network interface type
NT or TE (adjustable by configuration tool)*
TEI number
0 – 63 (adjustable by configuration tool)
CRC on Layer 1
Activated / deactivated (adjustable by configuration
tool)*
Connector type
Switchable RJ45 (see Subs. 2.1)
Supported voice codec
G.711a**
Supported B–channel
services
Only voice**
*The PRI 2 interface is always of the opposite type than the PRI 1 interface.
**Other streams are sent directly to the opposite PRI interface.
Installation Examples
There is an exact time source for synchronisation of the PRI interface lines on the PRI
board. Even if you have synchronisation problems on the installation site (caused by
specific and probably ill–configured PBXs with more that one active PRI interfaces),
there is a solution as shown below. Before using this solution you are recommended to
configure your PBX properly, or use the DialThru function. Red lines are calls to the
PSTN, orange lines are calls to GSM / UMTS networks.
Figure: DialThru Function Installation