CME GPP-3 Specifications download pdf (Page 43)

3GPP

3GPP TS 27.007 V6.3.0 (2003-

06)

Release 6

ATD**61*+1812555673*11*25#

OK (modification was successful)

Two new commands are created for controlling the alternating mode calls. First one, Call Mode (+CMOD), selects

between single and alternating mode. Because this is a crucial command, it is defined that the value is set back to

zero (single mode) after every successfully originated alternating mode call. Also on power-up and factory or user

resets, the value is set to zero. The second new command, Hangup Call (+CHUP), is not a replacement of V.250 [14]

command H, but a command which reliably disconnects the call in GSM/UMTS network. This is defined because the H

command is used to switch from fax or data mode to voice mode.

The setting of GSM/UMTS bearer service (data circuit duplex asynchronous and synchronous, PAD access circuit

asynchronous, or data packet duplex synchronous), is done with Select Bearer Service Type (+CBST). It chooses one of

the four mentioned bearer services, the data rate of the service (or actually the modulation when modem IWFs are

used), and enables or disables RLP. Command Radio Link Protocol (+CRLP) is used to set the RLP parameters in the

radio path.

Service Reporting Control command (+CR) is defined similarly as the reporting of modulation, V.18, error control, and

data compression which are V.250 [14] features used to show information about the type of the established connection

before the CONNECT intermediate result code. +CR command has one subparameter which specifies whether the

intermediate result code +CR: <serv> is returned or not. The result code should be returned before any V.250 [14]

reporting result codes. An example of setting up an asynchronous 9600 bit/s modem connection with service reporting:

AT+CBST=7,0,1 (asynchronous modem 9600 bit/s and RLP)

AT+CR=1 (enable reporting)

ATD1234567890

+CR: REL ASYNC

CONNECT 9600

As GSM/UMTS network offers more information about the reason of the failure in call originating and answering than

normal PSTN, it is useful to add an extra command to return this information to the TE. This information should not be

returned always after unsuccessful call originating or answering, because many TE applications look for just the regular

NO CARRIER, BUSY, NO ANSWER and CONNECT messages. Action command Extended Error Report (+CEER) does

not have any subparameters, and it returns the cause of the latest call setup failure. This information may be the textual

presentation of the GSM/UMTS network failure code (refer TS 24.008 [8] Annex H), or some other information defined

by the TA manufacturer.

7 Network service related commands

This clause describes GSM/UMTS network related commands, which are not covered in call control clause of the

present document. Commands include GSM/UMTS supplementary service handling, MSISDN query, MT and network

facility locking, and network registration information query.

7.1 Subscriber number +CNUM

Table 34: +CNUM action command syntax

Command

Possible response(s)

+CNUM

+CNUM: [<alpha1>],<number1>,<type1>[,<speed>,<service>[,<itc>]]

[<CR><LF>+CNUM: [<alpha2>],<number2>,<type2>[,<speed>,<service>

[,<itc>]]

[...]]

+CME ERROR: <err>

+CNUM=?

Description

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CME GPP-3 Specifications Page 43

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