Furuno Felcom 30 Operator's Manual page 191

MPDS in traffic log explanation:
SRejTx:
Rx
The counters are respectively the number of SREJ supervisory frames send and
received. This indicates errors in the forward and return path respectively.
Tx 5ms:
Tx20ms:
The counters are respectively the number of 5 ms and 20 ms bursts sent by the
terminal. These are a diagnostic tool for users with technical knowledge of the
MPDS system operation.
Rx CRC:
/:
The counters are the number of PDUs received with bad CRCs and the number
of PDUs with correct CRCs. Take note of this ration when reporting problems
related to throughput.
Connections:
<count>
The count is an estimate of the number of active connections on the shared
bearer. A high number here has a bearing on the throughput that can be
expected from the MPDS system.
Timt init:
Timecorrection: <count2><value2>
The counts are the number of timing inits and timing corrections received by the
terminal respectively. The values are the last received values in symbols of the
aforementioned items.
Port bytes Tx/Rx:
The counts are the number of bytes received from the PC and the ones sent to
PC from CU respectively.
<count1>
<count2>
<count1>
<count2>
<count1>
<count2>
<count1><value1>
7. TROUBLESHOOTING
7-15