ATM/AAL5

Field

Meaning

Transmit Cells Per Sec

The speed at which you are currently transmitting data in ATM cells per second. For reference, every ATM cell is 53 bytes in length. This includes 48 bytes of user data or pad and 5 bytes of protocol header. This value will constantly fluctuate as you transmit and receive data and may be even be 0.

Receive Cells Per Sec

The speed at which you are currently receiving data in ATM cells per second. For reference, every ATM cell is 53 bytes in length. This includes 48 bytes of user data or pad and 5 bytes of protocol header. This value will constantly fluctuate as you transmit and receive data and may be even be 0.

Transmit Bits Per Sec

The speed at which you are currently transmitting data in bits per second. This value will constantly fluctuate as you transmit and receive data and may be even be 0.

Receive Bits Per Sec

The speed at which you are currently receiving data in bits per second. This value will constantly fluctuate as you transmit and receive data and may be even be 0.

Transmitted Cells

The total count of cells transmitted by the modem.

Received Cells

The total count of cells received by the modem.

Dropped Cells The total count of cells dropped, for various reasons by the modem and therefore not processed. IN general, this count will increment in conjunction with CRC errors, as we are discarding cells due to one of those two errors. If HEC errors occur, this count is not incremented in conjunction with that count.
HEC Cells or HEC Errors The number of cells received with "Header Error Control" errors. This is a count of cells received in which the CRC for the ATM header was not successful.
Unassigned VPI/VCI The total number of cells being received for a VC other than the one configured for the modem. In general, this value should be zero. If you see this value incrementing, and the modem is not sending or receiving data, then the VC configured at the DSLAM does not match the one currently being used by the card. These values must match for the modem to operate.
Transmitted Frames The total number of AAL5 frame transmitted by the modem.
Received Frames The total number of AAL5 frame received by the modem.
Total Errors The total number of errors that have occurred on the modem.
CRC Errors The total number of CRC errors for the AAL 5 frames. This value in general should be zero but it is acceptable for the line to occasionally draw CRC errors. In general, the further you are from the DSLAM and the line mode (Fast path or Interleaved) will determine how many errors you may see here.
Oversized PDUs The number of AAL5 frames received that were "to large" to be processed by the modem.
Transmitted Cells The total count of cells transmitted by the modem.
Received Cells The total count of cells received by the modem.

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