Result Codes; V.25Ter; Basic Syntax Result Codes; Dr Data Compression Report - Nokia 30 GSM Connectivity Terminal At Command Manual

15. RESULT CODES

15.1 V.25TER

15.1.1 Basic syntax result codes

OK, ERROR, BUSY, CONNECT, CONNECT <rate>, NO ANSWER, NO CARRIER: See the
ITU-T Recommendation V.25ter, section 5.7.1 and the X, D, A and O commands in this
document. Note that OK can be a result of a successful remotely-initiated in-call modification
from data to speech mode, and CONNECT[<rate>] can be a result of a successful remotely-
initiated in-call modification from speech to data mode. NO CARRIER can also indicate the
remote hang up of a speech call.
RING: See ETSI GSM 07.07 /2/, section 7.12. See the ITU-T Recommendation V.25ter,
section 6.3.4 and the +CRC command in this document. The MT voice calls or alternating
voice/data calls starting with voice shall not result in this indication. When the RING result
code is enabled (+CRC=0), alternating MT voice/fax calls starting with voice shall
automatically be switched into the fax mode by the Nokia 30 (if +CMOD=0). Note that the
RING result code is not given for waiting calls.

15.1.2 +DR Data compression report

Format Description
+DR: <type> Given when +DR=1; informs about the presence of V.42bis data compression in the
established connection
The +DR intermediate result code, if enabled, is issued after the Error Control Report (+ER)
and before the final result code (e.g. CONNECT).
Defined values
<type>:
NONE
V42B
V42B RD
V42B TD
Data compression is not in use
V.42 bis is in use in both directions
V.42 bis is in use in receive direction only
V.42 bis is in use in transmit direction only
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