Sun Microsystems SPARCstation 4, Service Manual

Page: 167 / 190

Appendix B Input/Output Connectors and Ports B-5
B.6 Audio Module Ports (Optional)
FIGURE B-6
Audio Module Connectors
TABLE B-6
describes the signals for the Audio Module connectors.
5 A – Clear to Send (CTSa) 18 Transmit Clock DCE Source (TRxCB)
6 A – Data Set Ready (DSRa) 19 B– Request to Send (RTSb)
7 Signal Ground (GND) 20 A – Data Terminal Ready (DTRa)
8 A–Data Carrier Detect
(DCDa) 21 N/C
9 N/C – Reserved 22 N/C
10 N/C – Reserved 23 N/C
11 B – Data Terminal Ready
(DTRb) 24 A – Transmit Clock DTE Source
(TRxCa)
12 B – Data Carrier Detect
(DCDb) 25 B – Transmit Clock DTE Source
(TRxCb)
13 B–Clear to Send (CTSb)
1. Splitter cable (X985A) is required to use both ports simultaneously. Port A is synchronous/asynchronous.
Port B is asynchronous only.
TABLE B-6
Signals for the Audio Module Ports
1
1. E.I.A. standard 3.5-mm/0.125-inch jacks.
Headphone Line-Out Line-In Microphone (new)
Tip Left Channel Left Channel Left Channel Left Channel
Ring (Center) Right Channel Right Channel Right Channel Right Channel
Shield Ground Ground Ground Ground
TABLE B-5
Pinout for Combined Serial Connector Ports A and B (Continued)
Pin Description
1
Pin Description