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Chapter 11 - AT Command Set Summaries
11-3
Description of ATI2 Output:
The Link Status Report output appears as follows:
ZyXEL MODEMS LINK STATUS REPORT
Chars Sent 0 Chars Received 0
Octets Sent 0 Octets Received 0
Blocks Sent 0 Blocks Received 0
Blocks Resent 0 Max Outstanding 0
Max Block Size 0 Retrains Requested 0
Link Duration 0 Retrains Granted 0
FRN Requested 0 FRN Granted 0
FCS Errors 0 Round Trip Delay 0
Xmitter Underrun 0 Receiver Overrun 0
Last Speed/Protocol 14400
Disconnect Reason Local hang up
Data Type Description
Chars Data received from or sent to DTE (PC). (Formatted as 7,E,1 or
7,O,1 or 8,N,1 etc.)
Octets Data received from or sent to remote modem in error control mode.
(Compressed if data compression was enabled.)
Block Framed Octets. (Delimited by the unique bit pattern "01111110"
known as a flag.)
Output Parameter Output Value Description
Chars Sent Number of characters DTE has sent to modem
Chars Received Number of characters modem has sent to DTE
Octets Sent Number of data bytes sent to remote modem
Octets Received Number of data bytes received from remote modem
Blocks Sent Number of data blocks sent to remote modem
Blocks Received Number of data blocks received from remote modem
Blocks Resent Number of blocks resent due to remote modem request. (If there were
many blocks resent, you may have experienced line trouble or protocol
incompatibility.)
Max Outstanding Maximum blocks received without acknowledgment by remote
modem.
Max Block Size Maximum octets contain in a block
Retrains Requested The number of times local modem requested retrain.
Link Duration Total link duration time (in minutes).
Retrains Granted The number of times remote modem requested retrain.
T401 Time-outs For protocol maintenance, modem probably recovered.
T402 Time-outs For protocol maintenance, modem probably recovered.
FCS Errors Errors in frame (block) checksum. (If there were many FCS Errors,
you may have experienced problems on the line.)
Round Trip Delay Time (Units 1/2400 sec.)
Xmitter Un-derrun For modem's processor power measurement.
Receiver Overrun For modem's processor power measurement.
Disconnect Reason Local Hang-up Remote Hang-up
Carrier Lost On-Line (Not disconnected)
Resent Expiration Protocol Error
Break Time-out DTR Dropped
Carrier Lost 1 (No
handshaking response)
Carrier Lost 2 (Remote hang-up,
busy tone)