RFL Communications 21 Sub-MUX Instrukcja Użytkownika Pobierz pdf (Strona 8)

RFL SMX3/40 Page 8 of 24 Issue 2.02

User Manual

07 May 2009

8. Concatenation Port

The Concatenation Port provides optional direct connection to a co-located SMX3/40

serving another X21 link. Unless interrupted by a particular V24 port setting,

aggregate channel data passes between this port and the X21 port. This port has the

same capacity as the X21 Port. Signal timing is always transferred across the

Concatenation port when the port mode is set to ‘Aggregate Concatenation’.

The Concatenation Port is a DB15 female connector; this is connected internally to a

header on the PCB using a ribbon cable. The Concatenation Port may be configured

as DTE or DCE by fitting the ribbon cable to the appropriate X21 Port Header, and by

selecting settings on DIP switch 5. Note: DTE is the standard header location

used for Aggregate Concatenation i.e. direct connection to a co-located

SMX3/40.

Transceivers are specified to ± 15kV IEC1000-4-2 air discharge ESD protection and

port connections are additionally protected by Tranzorb type arrays.

Standard Concatenation Port Pin-out

(when in DTE configuration), as used for Aggregate Concatenation - D15F

Circuit Pin A Pin B Direction Notes

T Transmit Data 2 9 Output

R Receive Data 4 11 Input

S Signal Element

Timing

6 13 Input Timing signal received from

network

G Ground 8 15

X Signal Element

Timing

7 14 Output Timing signal transmitted to

network. Used for Aggregate

Concatenation facility; requires

mode

DTE + Timing Signal X

enabled

C Control 3 10 Output Permanently on. Not used in

Aggregate Concatenation

I Indication 5 12 Input Signal ignored. Not used in

Aggregate Concatenation

Screen / Drain

Must be earthed to shell

CONC. (DCE)

CONC. (DTE)

V24 V24

Headers connected

to X21 Port

Headers connected

to Concatenation

Port

Concatenation header locations

Note: For SMX3/40 Serial Nos.

1 – 8 only, the locations of the

concatenation DCE and DTE

headers are interchanged.

Header location used for

Aggregate Concatenation

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 23 24

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