SW3 - DTE SET CLOCK (TXC) POLARITY
When this
SW4 - LOOPBACK
When
Switch | Down | Up |
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|
|
SW1 | DCE: | DTE: |
| DCE Interface enabled | DTE Interface enabled |
SW2 | RC: | Inv: |
| RXC Clock polarity normal | RXC Clock polarity inverted |
SW3 | TTC: | Inv: |
| TXC Clock polarity normal | TXC Clock polarity inverted |
SW4 | Norm: | |
| Loopback disabled | Loopback enabled |
Figure B: Front Panel DIP-Switches
DIP-SWITCH BANK 1
SW1 -TERMINAL TIMING
When this
14)as supplied by the DTE device to time TXD, and uses ‘Signal Element Timing’ clock to time RXD. This is called
When Terminal Timing is used, both the local and remote modules must be set to use Terminal Timing, as well as the devices connected to each module. All four units must be in Terminal Timing Mode.
Switch | Down | Up |
|
|
|
SW1 | Off: | On: |
| Terminal Timing disabled | Terminal Timing enabled |
SW2 | Off: | On: |
| Reserved | Reserved |
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|
|
SW3 | Off: | On: |
| Reserved | Reserved |
SW4 | Off: | On: |
| Reserved | Reserved |
2) INSTALL STANDALONE MODULE AND CONNECT CABLES
a.The X21 Serial Media Converter is available in tabletop and
To power the unit using the AC/DC adapter, connect the AC/DC adapter to the AC outlet. Then connect the barrel plug at the end of the wire on the AC/DC adapter to the 2.5mm DC barrel connector
To power the unit using a DC power source, prepare a power cable using a two- conductor insulated wire (not supplied) with a 14 AWG gauge minimum. Cut the power cable to the length required. Strip approximately 3/8 of an inch of insulation from the power cable wires. Connect the power cables to the standalone unit by fastening the stripped ends to the DC power connector.
Connect the power wires to the DC power source. The Power LED should indicate the presence of power.
WARNING: Note the wire colors used in making the positive and negative connections. Use the same color assignment for the connection at the DC power source.
NOTE: If mounting with a safety ground attachment, use the safety ground screw at the rear of the unit.
b.When using the SFP model
NOTE: The release latch of the SFP Fiber transceiver must be in the closed (up) position before insertion.
c.Connect the included adapter cable to the serial port on the X21 converter. Use the appropriate gender plug to attach the X.21 device.
d.Connect an appropriate multimode or
SERIAL PORT CONNECTOR
The serial port is a
5 | 4 | 3 | 2 | 1 |
10 9 8 7 6
15 14 13 12 11
Figure C: Side | Figure D: Serial Port Connector |
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