Dynamix UM-SB Manual de usuario Pagina 155

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DynamixUMSNBUserManualVer1.00154
The pin out of DB-15 connector on X.25 adaptor cable:
Pin Signal Abbr. DTE DCE
1
Shield
-- -- --
2
Transmit (A) TA Out In
3
Control (A) CA Out In
4
Receive (A) RA In Out
5
Indication (A) IA In Out
6
Signal Timing (A) SA In Out
7
Unassigned
8
Ground
-- -- --
9
Transmit (B) TB Out In
10
Control (B) CB Out In
11
Receive (B) RB In Out
12
Indication (B) IB In Out
13
Signal Timing (B) SB In Out
14
Unassigned
15
Unassigned
Functional Description:
The Signal Element Timing (clock) (S) is provided by the DCE. This means that the NTU is output the correct clocking
and that X.21 is a synchronous interface. Hardware handshaking is done by the Control (C) and Indication ( I ) lines.
The Control is used by the DTE and the Indication is the DCE one.
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