CXR has developed the CB2000, a switcher/ concentrator connecting to 1 or 2 PRIs on the ISDN network and acting as a real ISDN hub. Channels are routed in a BRI channel bank, with individual reconstitution of ISDN signalling.
The equipment is ideal for making use of existing installations when changing to primary rate access. The CB2000 allows all of the ISDN/BRI lines to be combined in a single PRI ISDN line.