Telenetics MIU14.4, MIU9.6, MIU28.8 Received Line Signal Quality, S86 Connection Failure Cause

ADDITIONAL TEST / DIAGNOSTICS COMMANDS...

%L RECEIVED SIGNAL LEVEL

Returns a value (-dBm) which indicates the received signal level at modem DATA PUMP interface. This value is determined by the loss/gain of modem Telco Interface circuit ±dB at the Tip/Ring input to the modem. Typical value should be -25dBm to -35dBm for most Telco connections.

%Q RECEIVED LINE SIGNAL QUALITY

Reports the line signal quality at the modem DATA PUMP interface. This signal is also dependent on the DAA circuit (Telco Interface). Returns the higher order byte of the EQM (Eye Quality Monitor is the filter squared magnitude of the error vector). Typical value should be below 10. The lower the number, the better the performance from the modem.

ERROR response if NO connection to remote modem.

In &T1, modem %Q will be 0.

S86 CONNECTION FAILURE CAUSE

S86 can help determine the cause of a connection failure. When the modem issues a NO CARRIER result code, a value is written to this register. To read this register, following the connection failure, issue ATS86? <CR>. The modem will report one of the following values...

MIU Installation, Operation & Diagnostics Edition: March 30, 1998 Page 27