User`s manual

If the diagnostics are successful, connect the appropriate interface cables. The SYNC/570i-56 provides two ports:
• Switched 56K/DDS Telco interface with RJ-45 keyed 8-pin jack
• V.35/EIA-232 selectable interface with DB-25 connector
The cables and connectors for each interface are described below and on the following pages.
Switched 56K/DDS Telco Interface
The Telco interface is an RJ-45 keyed 8-pin jack. The jack pinout is shown below.
Figure 5, Switched 56K/DDS RJ-45 Telco Interface
CSU/DSU LED Indicators
During operation two bicolor LEDs show the status of the CSU/DSU. The location of the two bicolor LEDs is shown in
Figure 1 on Page 9. The No Rx Signal/Receive Data LED is labeled NS/RD, and the Test Mode/Transmit Data LED is
labeled TM/TD.
LED State NS/RD LED TM/TD LED
Red Loss of Telco Rx Signal CSU/DSU in Test Mode
Green DTE Rx Data active DTE Tx Data active
Off DTE Rx Data inactive DTE Tx Data inactive
When you connect the cable, both LEDs will be off. If the LEDs are blinking green, data traffic is present.
V.35/EIA-232 Selectable Interface
NOTE
Refer to Pages 9 and 10 for information about configuring the jumpers on the daughterboard to make the correct interface
selection.
The pinout and pin assignments for the DB-25 connector on the SYNC/570i-56 are shown below.
Figure 6, Board DB-25 fe***00000male connector pinout and pin assignments