PATTON ELECTRONICS COMPANY 2703 Card Type E1 CSU/DSU Chip Set Unidentified Transfer Rate 2.048Mbps Data Bus External [Image] CONNECTIONS Function Label Function Label 75 ohm coax line in or CN1 120V or 230V AC power CN5 out 120 ohm shielded CN2 Fuse for 120V: 250V @ F1 twisted pair 50mA Fuse for 230V: 250V @ 32mA 75 ohm coax line in or CN3 Power switch SW1 out V.35, V.36, or X.21 CN4 Local analog loopback SW2 port via UD-26 test switch Note:The information as to which coax connector is for transmit and which is for receive is unidentified. USER CONFIGURABLE SETTINGS Setting Label Position » Shield of transmit coax is not grounded LK1 Open Shield of transmit coax is grounded LK1 Closed » Shield of receive coax is not grounded LK2 Open Shield of receive coax is grounded LK2 Closed » Clock master mode disabled LK3 Open Clock master mode enabled LK3 Closed » Shield of twisted pair is not grounded LK4 Open Shield of twisted pair is grounded LK4 Closed » Auto-detect device connected to line in LK5 Closed Do not auto-detect device connected to LK5 Open line in » DSU is clock master S1/1 On DSU is clock slave S1/1 Off USER CONFIGURABLE SETTINGS (CON’T) Setting Label Position » Loopback mode is enabled only by front S1/4 Off panel switch Loopback mode is enabled continually S1/4 On » Transmitted and received data are not S1/5 Off inverted Transmitted and received data are S1/5 On inverted » Power supply set for 230V operation SW3 Off Power supply set for 115V operation SW3 On Note:Setting LK3 to Open overrides S1/1. When LK3 is closed, the DSU may still be set to Slave mode with S1/1. LINE TERMINATION IMPEDANCE Setting LK6 LK7 75 ohm Closed Closed 120 ohm Open Open LINE SPEED Setting S1/2 S1/3 256Kbps On On 512Kbps Off On 1.024Mbps On Off 2.048Mbps Off Off CLOCK SOURCE Setting S1/6 S1/7 External clock source On On Internal clock source Off Off SERIAL PORT TYPE Setting S1/8 S5/1 S5/2 S5/3 S5/4 S5/5 S5/6 S5/7 S5/8 V.35 N/A On On On On On On On On V.36 On Off Off Off Off Off Off Off Off X.21 Off Off Off Off Off Off Off Off Off SERIAL PORT TYPE (CON’T) Setting S6/1 S6/2 S6/3 S6/4 S6/5 S6/6 S6/7 S6/8 V.35 On On On On On On On On V.36 Off Off Off Off Off Off Off Off X.21 Off Off Off Off Off Off Off Off DIAGNOSTIC LED(S) LED Color Status Condition LED1 Green On Power is on LED1 Green Off Power is off LED2 Green On DSU is receiving valid signal LED2 Green Off DSU is not receiving valid signal LED3 Green On DSU is operating as master clock source LED3 Green Off DSU is operating as slave clock source LED4 Red On DSU is in loopback test mode LED4 Red Off DSU is not in loopback test mode