2N StarGate/BlueTower v5.3 - Manual (Page 52)

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2N TELEKOMUNIKACE a.s., www.2n.cz
®
Interface ISDN PRI (E1 frame)
Signalling Q.931 – EDSS1
Signalling channel
(D–channel)
16.
Network interface type NT or TE (adjustable by web interface)*
TEI number 0 – 63 (adjustable by web interface)
CRC on Layer 1
Activated / deactivated (adjustable by web
interface)*
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