Cabletron Systems CyberSWITCH CSX150 Quick Start Manual

Also see for CyberSWITCH CSX150: User guide User guide

Contents

CyberSWITCH 17CABLINGThe ISDN ConnectionCYBER SWITCHS REQUIRING DSU SFor countries that require DSUs (for example, Japan), your CyberSWITCH will not have an internalNT-1. You will need to use an external MJ and DSU in your connection to the network.CONNECTION I NSTRUCTIONS1. If you are not using an CyberSWITCH with an internal NT-1:a. Connect the CyberSWITCH to required intermediary devices (NT-1, or a MJ and CSU)using a straight through cable (RJ45 connectors and twisted pair).b. Connect the intermediary device to the network (for example, to your ISDN phone jack).2. If you are using an CyberSWITCH with an internal NT-1, simply connect the CyberSWITCH tothe network using a straight through cable (RJ45 connectors with twisted pair).TERMINATION S WITCHESOn the CyberSWITCH’s back panel (to the right of the BRI connector) there are a pair of terminationswitches for multipoint connections. These switches are labeled Term. These DIP switches controlthe terminating resistors for the Basic Rate Interface.You must set both switches in the same direction or improper operation may result. The smallarrow points in the direction of the on position. When the switches are on, the resistors for theconnector are providing termination for the BRI line. Conversely, when the switches are off, theresistors for the connector are not providing termination for the BRI line.On an S/T interface, it is important to have the switches set correctly. On a U interface, the circuitryis intended to operate properly no matter which switch setting is used; however, optimumoperation is achieved with the switches off.BRI Term 10BTBRI Term 10BT 10B2 Console DCPower Reset1 2RJ-45 ConnectorTwisted PairTo ISDNSourceRJ-45ConnectorRJ-45Twisted PairTo ISDN SourceDSUMJ