Nokia PremiCell - AT+CEER Extended Error Report; AT+CRLP Radio Link Protocol

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AT+CEER Extended Error Report
This command causes the data adapter to return one or more lines
of information text, which should offer the user of the data adapter
an extended report of the reason for the failure in the last unsuc-
cessful call setup (originating or answering). Typically, the text will
consist of a single line containing the failure information given by
the GSM network in a textual for-
mat. Syntax:
AT+CEER Display error report.
Response is +CEER:<report>.
AT+CRLP Radio Link Protocol
This command selects the Radio Link Protocol parameters.
Syntax:
AT+CRLP=[<iws>[,<mws>[,<T1>[, <N2>]]]] Set RLP parameters.
AT+CRLP? Query current setting.
Response is +CRLP:
<iws>,
<mws>, <T1>, <N2>.
AT+CRLP=? Show valid values.
Response is +CRLP: (0-
61),(0-61),(39-255),(1-
255).
Parameters:
<iws> IWF to MS window size (default 61)
<mws> MS to IWF window size (default 61)
<T1> acknowledgement timer T1 (default 60)
<N2> retransmission attempts N2 (default 6)