T-Home Comfort Pro S, Руководство по установке

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PBX Networking Types of Point-to-Point Connections
Example: In the above case you could reverse the L1 slave/master setting for the connection between PBX 1
and PBX 3. However, if you then activate the setting L1 sync possible for the port of PBX 1, this may cause
parts of the PBX network to stop functioning temporarily.
When applying the L1 clock of trunk lines, you can assume that the public network is “clock-aligned”. So, in
the above example, you can connect additional trunk lines to one of the PBXs.
Types of Point-to-Point Connections
There are different types of connection available for an point-to-point connection between two PBXs,
depending on the distance between them.
Direct Connection
This type of ISDN point-to-point connection joins the two systems directly to each other using a crossover
twisted-pair cable. An S
0
connection can be used for distances up to 1,000 metres. Normally one PBX is the
protocol master for all three layers, and the other PBX is the protocol slave for all three layers.
Direct connection
■
Use the RJ45 jacks on one of the external S
0
ports for an S
0
connection between two Comfort Pro Ss. You
can use the corresponding pressure terminals for S
0
ports on interface cards.
PBX 1
L1 master
L2 master
L3 master
PBX 2
L1 slave
L2 slave
L3 slave