PBX Cascading Variants of PBX Cascading
11. PBX Cascading
As requirements grow, the OpenCom 100 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 100 at several locations with different PBXs, this is possible by PBX Networking (see
page 153).
Please also refer to the short installation guide “OpenCom 100 cascading set” which is available as PDF file.
Note: It is not possible to cascade an OpenCom 131 with another communications system.
11.1
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 two cables. 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 130
OpenCom 150 Rack
Slave system
OpenCom 130
OpenCom 150 Rack
For the PBX Cascading you will need a licence. The licence agreement provides you with the necessary steps to activate this function.
11.2
Functionality of PBX Cascading
PBX cascading requires two twisted-pair leads with RJ45 plugs between the PBXs:
■ Voice data: one lead with all eight pins wired 1 to 1. Connect this to the PCM ports of the PBXs. The shielded CAT-5 lead may be up to three meters long.
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PBX Cascading Functionality of PBX Cascading
The PCM port is on the add-on module of the OpenCom 130. You must therefore install an add-on module in each of the two PBXs before they can be cascaded.
■ Administration data: one CAT-5 Ethernet lead.
– In the case of an OpenCom 130, connect the LAN2 port of the master system’s add-on module with a LAN2 port of the slave system’s add-on module.
– In the case of an OpenCom 150, connect the LAN1 port of the master system with a LAN1 port of the slave system.
Basic module
LAN
PBX 1
(Master)
Add-on module
PCM LAN1 LAN2 LAN0
Voice data lead
(eight pins assigned, joined 1 to 1) Hub/Switch
(in LAN of company)
Cascaded PBX system (OpenCom 130)
Basic module
LAN
PBX 2
(Slave)
Add-on module
PCM LAN1 LAN2 LAN0
CAT-5 Ethernet lead
PBX 1
(Master)
PBX 2
(Slave)
PCM1 PCM2 LAN0 LAN1 PCM1 PCM2 LAN0 LAN1
Voice data lead (eight pins assigned, joined 1 to 1)
CAT-5 Ethernet lead Hub/Switch
(in LAN of company)
Cascaded PBX system (OpenCom 150)
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