678
Works for both CAP and DMT lines

Behavioral Characteristics: Exterior Lights and Physical Connectivity
 
 
WAN (Wide Area Network) LNK:
Completely steady blink = Sees a digital signal but is not fully establishing a physical connection to the CO. more...

 

 

Patterned blink (blinks 3 times then goes off for a few seconds) = usually indicates trouble with the router itself, often can be fixed by recycling the power

Solid light = "trained." Has established a physical connection to the CO. (this symptom as of yet has not been seen on the 678)

No light = Does not see a digital connection to the CO. more...
 
 

WAN ACT:
This should only flash randomly when data is being transferred across the connection.
LAN (Local Area Network) LNK:
Solid light = has established a physical connection to the hub or computer.

 

 

No light = Has not established a connection to the hub or computer.,more...

LAN ACT:
This should only flash randomly when data is being transferred across the connection.
ALARM:
Should flash for a moment at POST (when turned on) and stay off.
If it turns on and stays on the router has a problem within the software or hardware inside the 678
POWER:
This light should turn on and stay solid if there is power.
Cable connections:
PWR:
This is a barrel plug on the back of the 678 - it is essential to have power to the 678 for it to work.
WALL:
This is where the line connects to the wall jack - This is the WAN0 port. - This connection is necessary to connect the computer to the internet
PHONE:
This is where you can plug a phone into the cisco - I think it is better than using a splitter at the jack. It is not necessary to have phone plugged into this port. The 678 does not have a built-in filter at this point, the 675 does. if you place a phone at this point you should include a filter as well.
ENET:
This is where you connect to the computer or hub. - this is your ETH0 port also known as the LAN. _ This connection is necessary to connect the computer to the internet
MGMT:
This is a port used to configure the 678 - the cable used here has an rj-45 connection on one end and a serial connection on the other end. This does not need to be connected all the time.
WAN LNK
Completely steady blink: Doing these steps backwards will isolate the issue faster.
1. Check and make sure the correct dial tone is passing through the 678.

2. Make sure the port marked "wall" has the cable going to the wall jack.
3. If there are phones on the line make sure they are filtered. (Special note: if the dsl line is the second line of a two line phone, the filters will be ineffective as they only filter out the center pair of wires)
4. Check the DIRECTION of the filters - "WALL" to the wall jack and "PHONE to the telephone (or any analog device).
5. It may be best to remove all devices other than the 678 from the line to rule out any interference from other devices on the line.
6. Note: If an Security System is present on the DSL line if may be very difficult to isolate it out of the scenario. If an alarm is present it would be best to connect the 678 at the SNI (the junction where Qwest's wires meet the Inside wiring). If a solid WAN LNK light is not obtained at this point, it is likely an issue with Qwest facilities.
No light:
1. The 678 is not recieving a digital signal: check for filters in-line with 678.
2. Power cycle the cisco and check to see if the light ever goes on. If the light never even flashes look at CBOS to see if DOH is enabled.
LAN LNK
No light:
1. Hub: if using cable provided (crossover) make sure it is plugged into an "uplink" port (this port may have a button next to it.
2. Hub: if using straight cable make sure it is plugged into a normal port on the hub.
3. Single user: ONLY USE THE CABLE PROVIDED!
4. Single user: verify Network Interface Card (NIC) is properly installed and being recognized by computer.