0db (Default)
Receivers on most newer T1 equipment (repeaters, switches, etc.) can automatically adjust for incoming amplitude, allowing them to run at zero attenuation regardless of distance.
Some older T1 equipment (repeaters, switches, etc.) cannot automatically adjust for incoming amplitude, in which case, it may be necessary to set attenuation manually (through NMS) from the choices above.
Timing
Local (Default)
The transmit clock source will originate from an oscillator onboard the
Loop
The transmit clock source will originate from the remote T1 modem.
ADDITIONAL INFORMATION
LED Indicators
LED |
| State |
| Indication |
| Additional Information |
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PWR (Power) |
| solid green |
| unit is operational |
| If the Power LED is not illuminated, it is |
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| unlikely the |
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| and none of the LEDs will be illuminated. |
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T1 LK (Link) |
| solid green |
| T1 connection is established |
| A T1 link exists and the port may be |
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| transmitting data but it is not receiving any |
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| packets from the remote T1 modem. |
pulsing | T1 connection is established and |
green | active |
no | Red Alarm |
illumination | The incoming connection to the port |
| has been lost; no data is being |
| received. |
The port is receiving valid data or status packets from the remote T1 modem.
If the outgoing connection from the port has also been lost then the remote T1 modem will be in Red Alarm as well.
T1 RX | flashing | T1 activity | The port is either receiving data from the |
(Receiving) | amber |
| remote T1 modem or statistical packets |
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| from the IP DSLAM management. |
| solid amber | heavy Rx traffic | The port is receiving large amounts of data |
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| from the remote T1 modem. |
| no | no activity | A link may exist but the port is not |
| illumination |
| receiving any data from the remote T1 |
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| modem. |
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