Guest cookan Posted January 17, 2003 Report Posted January 17, 2003 HI, I thought GPRS allowed me to receive data and make voice calls asynchronously, is that not true ? Messenger seem to be able to maintain a GPRS connection and receive live messages without preventing incoming voice calls.. During a voice call I'm basically getting this "unable to place data call whilst a voice call is in progress" thanks, Ant.
Guest pupton Posted January 17, 2003 Report Posted January 17, 2003 Thats correct. If you have an active GPRS session, it is suspended when a call comes in and then resumes after the call has ended. You will not be able to make a gprs call whilst on a voice call
Guest dbcohen Posted January 17, 2003 Report Posted January 17, 2003 GPRS and voice traffic cannot oocur at the same time under the GSM standard. The GSM channels that are used for the voice call are the same ones as used for GPRS.
Guest dbcohen Posted January 17, 2003 Report Posted January 17, 2003 GPRS and voice traffic cannot oocur at the same time under the GSM standard. The GSM channels that are used for the voice call are the same ones as used for GPRS.
Guest neilg Posted January 17, 2003 Report Posted January 17, 2003 afraid I have to disagree ;-) Depends on your class of GPRS Phone, SPV is class B so has to suspend and resume the data connection. Class A is possible but can't think of any offhand....not to be confused with GPRS Multislot class which tells you what combination of timeslots the device can use. I think it is in GSM05-06 (3GPP 25.006) from recollection but I could well be wrong on the standard. The class indicates the mobile phone capabilities. Class A Class A mobile phones can be connected to both GPRS and GSM services simultaneously. Class B Class B mobile phones can be attached to both GPRS and GSM services, using one service at a time. Class B enables making or receiving a voice call, or sending/receiving an SMS during a GPRS connection. During voice calls or SMS, GPRS services are suspended and then resumed automatically after the call or SMS session has ended. Class C Class C mobile phones are attached to either GPRS or GSM voice service. You need to switch manually between services.
Guest dbcohen Posted January 17, 2003 Report Posted January 17, 2003 Very interesting... Do Orange (or any other networks for that matter) support Class A in the UK? Are there any Class A phones available in the UK?
Guest neilg Posted January 17, 2003 Report Posted January 17, 2003 AFAIK it is phone dependent rather than network, the network will just keep dishing out timeslots whether it be for voice or data. The only issues I can think of is thsat now PBCCH is coming in (as the standard Control Channels are getting killed by all the extra work for MMS, SMS, GPRS) I am not sure if you would need to support to lots of signalling simultaneously and how that is resolved. Cant think of any devices that support it. Incidentaly I am pretty sure there us no Class 12 GPRS network up and running globally yet, OpCo's doing class 10 max
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