Lucent Technologies PortMaster OR-HS, Руководство по установке оборудования

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Cable and Ethernet Specifications D-5
X.21 Cable
X.21 Cable
Table D-4 gives pinout information for an X.21 cable with DB-25 and DB-15
connectors. Pins not listed have no connection.
Table D-4 Synchronous X.21 Cable
PortMaster
Port W1
V.35
DB-25
Pin
Name Definition Direction
X.21
DB-15
Pin
Name
7 B SGND Signal Ground 8 SGND
10 Control B
4 C RTS Request to
Send Output 3 Control
A
5 D CTS Clear to Send Input
8 F CD Carrier Detect Input 5 Indicate
A
3 R RXA Receive Data Input 4 RXA
16 T RXB Receive Data Input 11 RXB
17 V RX CLKA Receive
Timing Input 6 CLKA
15 Y TX CLKA Send Timing Input
19 X RX CLKB Receive
Timing Input 13 CLKB
13 AA TX CLKB Send Timing Input
2 P TXD A Transmit Data Output 2 TXA
14 S TXD B Transmit Data Output 9 TXA