ADTRAN

NT1 TYPE 400

Card Type                 ISDN T1
Chip Set                  Unidentified
I/O Options               ST local bus interface via RJ-45 connectors (2),
                          power

                          U T1 network interface via RJ-45 connector
T1 Data Rate              1.544Mbps
ISDN D-channel Protocol   X.25
Line Coding               2B1Q
Framing                   Unidentified
Data Bus                  External

[Image]

                                               CONNECTIONS

              Function                 Label                 Function                 Label

 U T1 network interface via (RJ-45)     CN1     S/T ISDN local bus interface           CN3
                                                (RJ-45)

 S/T ISDN local bus interface           CN2
 (RJ-45)

                       USER CONFIGURABLE SETTINGS

                    Function
                                                   Label
                                                             Position

 Factory configured - do not alter
                                                   SW1/1
                                                           Unidentified

 Extended passive bus cinfiguration
                                                   SW1/2
                                                                On

 Short passive bus configuration
                                                   SW1/2
                                                               Off

                           LOCAL BUS TERMINATION

              Function                SW1/3     SW1/4    SW1/5     SW1/6

 50 Ohm local bus termination          Off       Off       On       On
 enabled

 100 Ohm local bus termination          On       On       Off       Off
 enabled

 Local bus termination disabled        Off       Off      Off       Off



                                          DIAGNOSTIC LED(S)

   LED             Color                      Status                          Condition

   RDY             Green                        On                 Network is ready to place a call

   RDY             Green                 Blinking (fast)               U interface not ready or
                                                                          performing a test

   RDY             Green                 Blinking (slow)              S/T interface not ready or
                                                                          performing a test

   RDY             Green                       Off                Network not functioning or unit is
                                                                         not receiving power

   ERR              Red                         On                    Error condition detected on
                                                                         network or local bus

   ERR              Red                        Off                   Error condition not detected

   PWR             Green                        On                           Power is on

   PWR             Green                       Off                           Power is off

 Note: If ERR indicator is illuminated, pulse rate of RDY indicator will determine error source. If
 RDY indicator is blinking, and ERR indicator is off, then a test is in progress.