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Small Office Install
Small Office Edition Installation Manual
Page 52
IP Office 3.0
40DHB0002UKED Issue 3 (4th February 2005)
X.21 WAN Cable
SAP Code:- 700213408
A. 37 Way D-Type Plug with UNC 4-40 locking screws.
B. 15 Way D-Type Plug with M3 locking screws.
C. Label
D. 6 twisted pair screened cable - each core is 7/0.203mm (24 AWG) tinned copper stranded wire,
nominal capacitance of 98pF/m, impedance of 77 at 1MHz, screened with aluminized tape and a
tinned copper wire drain.
E. 3 meters/9.84ft.
Pin Connections
End A
Name
Cable Notes End B
1 Receive
(Rx-B)
11
20 Receive
(Rx-A)
Twisted Pair
4
4 Transmit
(Tx-
A)
2
23 Transmit
(Tx-
B)
Twisted Pair
9
24 Control
(Ctl-A)
3
5 Control
(Ctl-B)
Twisted Pair
10
2 Indicate
(Ind-A)
5
21 Indicate
(Ind-B)
Twisted Pair
12
3 SE-Timing
(S-
A)
6
22 SE-Timing
(S-
B)
Twisted Pair
13
6 Ground
------
8
•
Connect pin 7 to pin 6 at End A
only
.
•
Pin 19 at end A is connected to the Screened Cable Drain Wire.
•
This cable is used to connect a WAN port to a Digital leased Line.