Aastra OpenCom 131 User Guide - Page 150
PBX Cascading, 11.1 Variants of PBX Cascading, 11.2 Functionality of PBX Cascading
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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. 148