Pbx Cascading - Aastra OpenCom 510 User Manual

PBX Cascading

12. PBX Cascading
As requirements grow, the OpenCom 510 can be operated together with other
PBX installations. If you merely need a larger number of connections, it is easy to
link a second PBX (PBX Cascading). If you want to operate the OpenCom 510 at
several locations with different PBXs, this is possible by PBX Networking (see
page 149).
12.1 Variants of PBX Cascading
You can combine two PBXs in order to increase the number of terminals that can
be connected. A master PBX and a slave PBX are connected to one another by
means of a cable. The two PBXs essentially function like a single PBX with a higher
number of ports. The master PBX controls the slave PBX. The following PBXs from
the product family can be used for cascading:
Master system
OpenCom 510
For the PBX Cascading you will need a licence. The licence agreement provides
you with the necessary steps to activate this function.
12.2 Functionality of PBX Cascading
Cascaded PBXs must be connected by means of a twisted-pair lead with RJ45
plugs. All eight pins of the lead must be wired 1 to 1. Both voice and adminis-
tration data are transferred via this lead. Connect the lead to the PCM ports of the
two MC+1-3 central control modules of the PBXs. The shielded CAT-5 lead must
not be longer than 50 centimetres.
144
Note: Owing to the very short permissible lead length, the
two PBXs have to be stacked. It is not possible to place them
side by side.
Variants of PBX Cascading
Slave system
OpenCom 510