PBX Cascading Putting a Cascaded PBX into Operation
137
Please note: If you change the type of slave system later on, the port set-
tings that have been made will be deleted.
The master system then initialises the slave system. This may involve transfer of
firmware (operating software) from the master system to the slave system. This
can take a few minutes.
7. Configure the system telephone connected to the slave system for testing pur-
poses in the Configurator. In the PBX Configuration: Ports: Upn dialogue,
click on one of the additionally displayed entries of the type Upn 1/m/n
(1: slave system, m: slot number, n: U
pn
port number).
Note: Changes to the configuration while initialising the
slave system may trigger error reports referring to the ongo-
ing initialisation.
You can see that the initialisation has been completed from the display on the
system telephone connected to the slave system.
12.3.1 Notes
Observe the following when operating a cascaded PBX system:
■ All U
pn
, S
0
and a/b ports of the slave system interface cards can be used with
appropriate telephones. All features of system telephones on U
pn
ports are
available without restriction.
■ The S
0
ports of the slave system can also be used for trunk lines or for PBX net-
working (see PBX Networking starting on page 140).
■ It is not possible to operate a DECT base station on one of the U
pn
ports of the
slave system.
■ The ISDN-L1 reference clock signal is always transferred from the master to the
slave system and must be acquired from an S
0
port –or preferably an S
2M
-
port– on the master system. The master system therefore needs to be con-
nected to at least one ISDN trunk line.
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