Dynamix UM-SB Manual do Utilizador descarregar pdf (Página 155)

DynamixUM‐SNBUserManualVer1.00154

The pin out of DB-15 connector on X.25 adaptor cable:

Pin Signal Abbr. DTE DCE

Shield

-- -- --

Transmit (A) TA Out In

Control (A) CA Out In

Receive (A) RA In Out

Indication (A) IA In Out

Signal Timing (A) SA In Out

Unassigned

Ground

-- -- --

Transmit (B) TB Out In

Control (B) CB Out In

Receive (B) RB In Out

Indication (B) IB In Out

Signal Timing (B) SB In Out

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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