3COM CORPORATION
================

   OFFICECONNECT REMOTE 520/521

   Card Type        ISDN to Ethernet router                       
   NIC Type         ISDN, Ethernet                                
   Maximum Onboard  Unidentified                                  
   Memory           
   I/O Options      RJ-11, RJ-45 (2), 9-pin serial port (RS-232), 
                                                                  
                    BNC connector, ISDN BRI interface             
   Network Transfer 128Kbps                                       
   Rate             
   Topology         Star                                          
   Wiring Type      RJ-45 Unshielded twisted pair                 
                                                                  
                    ISDN BRI                                      
                                                                  
                    RG58A/U 50ohm coaxial                         
   Data Bus         External                                      

<gopher://bitreich.org/I/th99/t/0-9/54886-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Function      | Label |       Function        | Label |
   |--------------------+-------+-----------------------+-------|
   | DC power connector |  CN1  | RJ-45 UTP connector   |  CN4  |
   |--------------------+-------+-----------------------+-------|
   | 9-pin serial port  |  CN2  | RJ-45 ISDN connector  |  CN5  |
   |--------------------+-------+-----------------------+-------|
   | BNC connector      |  CN3  | RJ-11 analog phone    |  CN6  |
   |                    |       | interface             |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Label | Position  |
   |----------------------------------------+-------+-----------|
   |>> | Factory configured - do not alter  | RESET |    N/A    |
   |---+------------------------------------+-------+-----------|
   |>> | Hub connection enabled             | MDI/X |    In     |
   |---+------------------------------------+-------+-----------|
   |   | Single PC connection enabled       | MDI/X |    Out    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |  LED  | Color  |  Status  |           Condition            |
   |-------+--------+----------+--------------------------------|
   | ALRT  | Orange |    On    |   Error detected on network    |
   |-------+--------+----------+--------------------------------|
   | ALRT  | Orange | Blinking |   Device is loading software   |
   |       |        |  (slow)  |     during power up or new     |
   |       |        |          |  software is being downloaded  |
   |-------+--------+----------+--------------------------------|
   | ALRT  | Orange | Blinking | Self diagnostic test is being  |
   |       |        |  (fast)  |   conducted during power up    |
   |-------+--------+----------+--------------------------------|
   | ALRT  | Orange |   Off    |  Device has passed diagnostic  |
   |       |        |          | tests and is working properly  |
   |-------+--------+----------+--------------------------------|
   |  PWR  | Green  |    On    |          Power is on           |
   |-------+--------+----------+--------------------------------|
   |  PWR  | Green  | Blinking |     New software is being      |
   |       |        |  (slow)  |           downloaded           |
   |-------+--------+----------+--------------------------------|
   |  PWR  | Green  | Blinking |    Self diagnostic test or     |
   |       |        |  (fast)  |   software loading is being    |
   |       |        |          |   conducted during power up    |
   |-------+--------+----------+--------------------------------|
   |  PWR  | Green  |   Off    |          Power is off          |
   |-------+--------+----------+--------------------------------|
   | LINK  | Orange |    On    |   LAN connection established   |
   |-------+--------+----------+--------------------------------|
   | LINK  | Orange |   Off    |   No LAN connection detected   |
   |-------+--------+----------+--------------------------------|
   | ISDN  | Green  |    On    |    Device is connected to a    |
   |       |        |          |       working ISDN line        |
   |-------+--------+----------+--------------------------------|
   | ISDN  | Green  | Blinking |  An error condition has been   |
   |       |        |          |   detected on the ISDN line    |
   |-------+--------+----------+--------------------------------|
   | ISDN  | Green  |   Off    |   ISDN condition not present   |
   |-------+--------+----------+--------------------------------|
   |  CH1  | Yellow |    On    |  ISDN call is in progress on   |
   |       |        |          |           channel 1            |
   |-------+--------+----------+--------------------------------|
   |  CH1  | Yellow | Blinking | ISDN call is in dialing state  |
   |       |        |          |          on channel 1          |
   |-------+--------+----------+--------------------------------|
   |  CH1  | Yellow |   Off    |  ISDN call is not in progress  |
   |       |        |          |          on channel 1          |
   |-------+--------+----------+--------------------------------|
   |  CH2  | Yellow |    On    |  ISDN call is in progress on   |
   |       |        |          |           channel 2            |
   |-------+--------+----------+--------------------------------|
   |  CH2  | Yellow | Blinking | ISDN call is in dialing state  |
   |       |        |          |          on channel 2          |
   |-------+--------+----------+--------------------------------|
   |  CH2  | Yellow |   Off    |  ISDN call is not in progress  |
   |       |        |          |          on channel 2          |
   |-------+--------+----------+--------------------------------|
   | VOICE | Yellow |    On    |     Voice call in progress     |
   |-------+--------+----------+--------------------------------|
   | VOICE | Yellow | Blinking | Handset is off hook, dial tone |
   |       |        |          | present; call has been dialed  |
   |       |        |          |   and is ringing out, or an    |
   |       |        |          |     incoming call is being     |
   |       |        |          |            received            |
   |-------+--------+----------+--------------------------------|
   | VOICE | Yellow |   Off    |   Voice call not in progress   |
   |-------+--------+----------+--------------------------------|
   |  WAN  | Yellow |    On    |  WAN connection is valid and   |
   |       |        |          |         can pass data          |
   |-------+--------+----------+--------------------------------|
   |  WAN  | Yellow | Blinking | Error detected on the WAN port |
   |------------------------------------------------------------|
   | Note:                                                      |
   |                                                            |
   | ISDN utilization LEDs provide an indication of ISDN        |
   | utilization as a percentage of network loading. If ISDN    |
   | utilization is consistently indicated at 100%, the device  |
   | may be configured to filter some of the data, or an        |
   | additional link may be required.                           |
   +------------------------------------------------------------+