ZyXEL U-1496S Plus User Guide - Page 103

FCS Frame Check Sum Errors FE

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The count of blocks retransmitted (Bad receiving on the remote modem). FCS (Frame Check Sum) Errors (FE) The count of FCS errors received (block errors) (Bad receiving on local modem). LINK STATUS REPORT (ATI2) During a connection, the modem will record information about link operations. You can use an AT command (ATI2) to see the summary, as in the following sample: ZyXEL U-MODEM LINK STATUS REPORT Chars Sent 2420 Chars Received2420 Octets Sent 950 Octets Received 950 Blocks Sent 13 Blocks Received 13 Blocks Resent 0 Max Outstanding 8 Max Block Size 256 Retrain Requested 0 Link Duration 1 Retrain Granted0 T401 Timeouts 0 T402 Timeouts 0 FCS Errors 0 Round Trip Delay 110 Xmitter Underrun 0 Receiver Overrun 0 Last Speed/Protocol Connect 14400/ARQ/V42b Disconnect Reason Local Hang Up This Link Status Report is very helpful in finding out the link condition and what is wrong with the link, if anything. Following are the explanations for each item and terminology used in this report. Chars Data characters transmitted between DTE (computer/terminal) and modem. Octets Data bytes transmitted between the modems, handled by error control protocol, may be compressed data. Data compression efficiency may be seen from the ratio of chars count to octets count. Block Framed octets transmitted between error control protocols of the two modems. Chars Sent Characters sent from DTE to modem for transmission. Chars Received Characters received by modem from line and sent to DTE. Octets Sent

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The count of blocks retransmitted (Bad receiving on the remote modem).
FCS (Frame Check Sum) Errors (FE)
The count of FCS errors received (block errors) (Bad receiving on local modem).
LINK STATUS REPORT (ATI2)
During a connection, the modem will record information about link operations. You can use an
AT command (ATI2) to see the summary, as in the following sample:
ZyXEL U-MODEM LINK STATUS REPORT
Chars Sent
2420
Chars Received2420
Octets Sent
950
Octets Received
950
Blocks Sent
13
Blocks Received
13
Blocks Resent
0
Max Outstanding
8
Max Block Size 256
Retrain Requested
0
Link Duration
1
Retrain Granted0
T401 Timeouts
0
T402 Timeouts
0
FCS Errors
0
Round Trip Delay
110
Xmitter Underrun
0
Receiver Overrun
0
Last Speed/Protocol
Connect
14400/ARQ/V42b
Disconnect Reason
Local Hang Up
This Link Status Report is very helpful in finding out the link condition and what is wrong with the
link, if anything. Following are the explanations for each item and terminology used in this report.
Chars
Data characters transmitted between DTE (computer/terminal) and modem.
Octets
Data bytes transmitted between the modems, handled by error control protocol, may be
compressed data. Data compression efficiency may be seen from the ratio of chars count to
octets count.
Block
Framed octets transmitted between error control protocols of the two modems.
Chars Sent
Characters sent from DTE to modem for transmission.
Chars Received
Characters received by modem from line and sent to DTE.
Octets Sent