2.3.5 *FireWire (IEEE1394A) Pin Header: *J148/*J149
Signal
Pin 
Pin 
Signal
NC1
TPA +
GND
TPB +
+12V
GND
NC2
1
3
5
7
9
11
13
2
4
6
8
10
12
14
Key
TPA ?
GND
TPB ?
+12V
GND
Key
Note: J148 & J149 are only available on S2877ANRF version.
2.3.6 Buzzer/External Speaker Header: J14
PIN1
Pin # | Signal Description |
1 | Speaker+ |
2 | NC |
3 | Buzzer- |
4 | Speaker- |
Close Pin3 and Pin4 (Default)
Enable onboard buzzer
Open Pin3 and Pin4
Disable onboard buzzer or connect to chassis speaker
15
http://www.tyan.com
