ADTRAN TRACER 4106 Plan A System Manual

Also see for TRACER 4106: Quick reference guide Quick reference guide

TRACER 4106/4206 System Manual Section 3 Engineering Guidelines612804206L2-1A © 2004 ADTRAN, Inc. 29RS-232 Connection (Modem Use)Modem controls, discussed in Section 5, User Interface Guide, enable or disable modem controlthrough the RS-232 interface. When this option is enabled from a standard terminal connection, allRS-232 communications cease until a modem with a null modem adapter is attached between theTRACER 4106/4206 and the data modem. Configure the data modem for AUTO ANSWER and 9600 BPS.When the user connects via the modem to the TRACER 4106/4206 unit, communications via the RS-232port resume. If a user accidentally enables modem control from a terminal and disrupts the RS-232communication, pressing <Ctrl + Z> three times will temporarily disable the modem control option (untilthe system is reset) and will access the system option to disable modem control.The TRACER 4106/4206 must be interfaced to a modem via an RS-232 null modem adapter or cable. Thenull modem converts Clear To Send (CTS) and Data Set Ready (DSR) into Ready To Send (RTS) and DataTerminal Ready (DTR), respectively. These signals indicate (to most modems) that a valid DTE terminaldevice is present. The null modem interface must route Carrier Detect (CD) on pin 8 directly from themodem. When using the RS-232 interface for modem control, the modem must source CD only whenactually connected to a carrier.When M ODEM C ONNECTION is selected in the menu system, the TRACER 4106/4206 will de-assert DTRand DSR for a time greater than 20 msec. The null modem consequently drops DTR and RTS at themodem interface, signaling the modem to hang up the line. If password functionality is enabled in theTRACER 4106/4206, selecting M ODEM C ONNECTION resets the TRACER 4106/4206 to the password entryTable 3. TRACER 4106/4206 (DCE) to Terminal (DTE) Diagram (DB-25)PIN NAME PIN NAME2 TX 3 TX3 RX 2 RX4 RTS 4 RTS5 CTS 5 CTS6 DSR 6 DSR7 GND 7 GNDTable 4. TRACER 4106/4206 (DCE) to Personal Computer (DB-9)PIN NAME PIN NAME2 TX 3 TX3 RX 2 RX4 RTS 7 RTS5 CTS 8 CTS6 DSR 6 DSR7 GND 5 GND