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# 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
(IMG) IMG 1
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+