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