ADCP-50-304 • Issue 19 • June 1999 • Section 4: PatchSwitch X.21
2.6PSO-839001 Backplane Adapter Module
Three 15-pin D-sub connectors, located on the back of this backplane adapter provide a point of connection for customer cabling. The top two rear connectors are female and the bottom one is male. Three male 25 pin D-sub connectors on the front of the backplane adapter provide connections to the RDC-01/PSC-01 PatchSwitch chassis backplane.
2.7PSO-836001 Backplane Adapter Module
Three 15 pin D-sub connectors, located on the back of this backplane adapter provide a point of connection for customer cabling. The top two rear connectors are female and the bottom one is male. Three 25 pin D-sub connectors on the front of the backplane adapter provide connections to the RDC-02/PSC-02 PatchSwitch chassis backplane. The top two front connectors are male and the bottom one is female.
2.8PSO-839002 Backplane Adapter Module
This adapter is used with the Interface or Test/Status module only and is always installed in chassis slot 17. Two female 15-pin D-sub connectors, located on the back of this backplane adapter provide a point of connection for customer cabling. Two male 25 pin D-sub connectors on the front of the backplane adapter provide connections to slot 17 of any PatchSwitch chassis backplane.
3 FUNCTIONAL DESCRIPTION
3.1A/B Switch Modules
All X.21 PatchSwitch modules with A/B switching are capable of switching either rear port A or rear port B to rear port C. This switching is accomplished using the front panel toggle switch in conjunction with an enable signal from the backplane. See Figure 4-6for a block diagram showing the switching configuration.
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© 1999, ADC Telecommunications, Inc.
