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USER’S MANUAL
Section 3: GUIDED TOUR of the HARDWARE 51
ParallelControlPort
Theparallelcontrolporthas8inputsand8outputsthatcanbeusedinavarietyofways.For
instance,inAAC,AAC‐LD,Layer3andcertainLayer2modes,thesecontactclosurescan
communicatebetweentwoZephyrXstreams.BygroundinganinputonthelocalXstream,you
wouldtheref
orecausecurrenttoflowintothecorrespondingoutputatthefarendunit.These
canalsobeusedforlocalcontrolandtomonitorlocalstatus.
Z
ZEPHYR CLASSIC VS. XSTREAM COMPARISON!
The original Zephyr has only four inputs and outputs numbered 0-3 while the Xstream has 8
inputs 0-7. The four inputs and outputs of the Zephyr will communicate with the first four
inputs and outputs of the Xstream (i.e. 0-3).
PIN FUNCTION
1 +5 Volts DC 400 mA max
2* Output 0
3* Output 1
4* Output 2
5* Output 3
6 Output 4
7+ Output 5
8+ Output 6
9+ Output 7
10 No Connection
11 No Connection
12 No Connection
13 No Connection
14* Input 0
15* Input 1
16* Input 2
17* Input 3
18 Input 4
19+ Input 5
20+ Input 6
21+ Input 7
22 Not Connected
23 Not Connected
24 Not Connected
25 Ground
*
These pins are compatible with the
corresponding input/outputs of the
Zephyr Classic.
+
These pins are compatible with the
corresponding inputs/ outputs of
the Zephyr Xport
NOTE: Pin 1 is connected directly to the +5 volt power supply. Failure to limit current
draw on this pin could cause hardware damage or system instability.