Excalibur 366 Spezifikationen PDF herunterladen (Seite 51)

Installing the DAP

3-5

Table 3-1. RS-232 DTE Connector, Pin/Signal Assignments (Continued)

Pin No. CCITT V.24

Symbol

RS-232

Symbol

Input/

Output Function

14 118 SBA Input Secondary Channel Transmit Data.

15 114 DB Output Transmit Clock.

16 119 SBB Output Secondary Channel Receive Data.

17 115 DD Output Receive Clock.

18 141 LL Input Local Digital Loopback. An On condition

places the DAP into a Digital Loop test.

19A* 120 SCA Input Secondary Channel RTS. Used with remote

site units.

19B* – – Output Digital Power Failure output. Used with

central site units.

20 108/1, 108/2 CD Input Data Terminal Ready (DTR). An On

condition indicates DTE is requesting the

port. When the signal is Off, the port is not in

use.

21A* 110 CG Output Signal Quality. An On condition indicates

that a signal quality of Good or Best is

displayed on the front panel. An Off

condition indicates that a signal quality of Fair

or Poor is displayed.

21B* 140 RL Input Remote Digital Loop Command. An On

condition sends the far-end DAP into a V.54

Loop test.

22 125 CE – Not supported.

23A 111, 112 CH Output Signal Indicator. Active when the DDS line is

available. Inactive when the DDS line is lost.

24 113 DA Input External Transmit Clock.

25 142 TM Output Test Mode. On when the DAP is in a test.

* The signal assigned to this pin is selected through the DAP's configuration menu and/or its jumper settings.

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Excalibur 366 Spezifikationen Seite 51