ZyXEL Omni TA 128 User Guide - Page 171
Number, ITU-TSS, Signal, Signal/Pin, Description, Direction, DTE -DCE
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Pin Number 21 22 24 25 ITU-TSS Signal Name 140 125 113 142 EIA Signal/Pin Signal Description Name line. Remote Digital Loop Test. CE Ring Indicator(RI). DA Transmit Clock Signal (source: DTE). Test Indicator. Signal Direction DTE -DCE ⇒ ⇐ ⇒ ⇐ Async. Hardware Flow Control Cable Connection Modem to PC (DCE) Signal (DTE) DB25 DB 9 2 TXD 3 3 RXD 2 4 RTS 7 5 CTS 8 6 DSR 6 7 Ground 5 8 CD (DCD) 1 20 DTR 4 22 RI 9 to DCE (Null) DB25 3 2 5 4 20 7 20 6,8 to MAC Mini 8 3 5 1 2 4,8 1 to NeXT 68,040 Mini 8 3 5 6 8 4 2 1 159
159
Pin
Number
ITU-TSS
Signal
Name
EIA
Signal
Name
Signal/Pin
Description
Signal
Direction
DTE -DCE
line.
21
140
Remote Digital
Loop Test.
22
125
CE
Ring Indicator(RI).
24
113
DA
Transmit Clock
Signal (source:
DTE).
25
142
Test Indicator.
Async. Hardware Flow Control Cable Connection
Modem
to PC
to DCE
to
to NeXT
(DCE)
Signal
(DTE)
(Null)
MAC
68,040
DB25
DB 9
DB25
Mini 8
Mini 8
2
TXD
3
3
3
3
3
RXD
2
2
5
5
4
RTS
7
5
1
6
5
CTS
8
4
2
8
6
DSR
6
20
7
Ground
5
7
4,8
4
8
CD (DCD)
1
20
2
20
DTR
4
6,8
1
1
22
RI
9