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NowSMS Support Forums ⬆ MMS & SMS Technical Discussions (unsupported) ⬆ |
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| Author | Message | |||
| Ramón New member Username: El_miche Post Number: 21 Registered: 02-2008 |
Hi, Des. Do you know if is posible fix connection between a GSM and a particular Cell? For example: - in a place are coverage of two cell towers of same operator (cell A, and cell B). - wen gsm modem star up, this take signal an register on a Cell A. Always, automaticaly register on a Cell A. - Is posible set manualy LAC ID and CID (or another parameter) for the modem register always on a cell B? Regards. | |||
| Des - NowSMS Support Board Administrator Username: Desosms Post Number: 5687 Registered: 08-2008 |
Hi Ramón, As part of the ETSi/3GPP standard commands, no. However, some modules do have extended commands. For example, Wavecom modem chipsets have commands defined to lock the modem to a specific cell tower frequency. AT+CCELL=xx tells the modem to connect to the cell tower at frequency xx. The AT+CCED=0,3 command can be used to query available cells. The docs give the following example response: +CCED:208,20,0002,0418,37,706,24,,,0 ,,,0,208,20,0006,989b,37,835,20,208,2 0,0002,02a9,37,831,12,208,20,0101,79 66,34,818,13,208,20,0006,9899,39,713 ,9,208,20,0002,0a72,33,711,12,208,20, 0101,03fb,36,824,10,1 OK The response contains info on the current connected (main) cell and up to 6 neighbor cells. The main cell has 13 parameters, and the neighbors have 7 parameters. The cell frequency is the 6th parameter for each cell. Looking at the example...I've bolded the cell frequency. Main: 208,20,0002,0418,37,706,24,,,0 ,,,0 Neighbor 1: 208,20,0006,989b,37,835,20 Neighbor 2: 208,2 0,0002,02a9,37,831,12 Neighbor 3: 208,20,0101,79 66,34,818,13 Neighbor 4: 208,20,0006,9899,39,713 ,9 Neighbor 5: 208,20,0002,0a72,33,711,12 Neighbor 6: 208,20, 0101,03fb,36,824,10,1 -- Des NowSMS Support | |||
| Ramón New member Username: El_miche Post Number: 22 Registered: 02-2008 |
Thanks dess, i will try if my modem support this commands. So, for example: If i want to connect to Neighbor 3, just input AT+CCELL=818 command. Is this right? what happens if the modesm restart? Is needed insert the comman again? Regards and thanks so much. | |||
| Ramón New member Username: El_miche Post Number: 23 Registered: 02-2008 |
Hi, again. i was just try and my modem support +ccell command. But I have a question (in addition to the above). for example: - I set AT+CCELL=818 - modem response +ccell 818,xx But later I have a lot of same response. just they appear +ccell 818,xx +ccell 818,xx +ccell 818,xx +ccell 818,xx +ccell 818,xx +ccell 818,xx +ccell 818,xx ...all time. | |||
| Des - NowSMS Support Board Administrator Username: Desosms Post Number: 5688 Registered: 08-2008 |
Hi Ramón, I have limited experience with these commands, but I do believe the setting needs to be re-applied after a restart (and possibly also if the application closes/reopens the modem connection). If using NowSMS, I would add CommandPostInit1=AT+CCELL=818 to the appropriate modem section in SMSGW.INI. What value are you seeing for xx? 0 is OK...3 means connection lost. Some more info here: http://archive.sierrawireless.com/Download.aspx?File=%5CAirPrime%5CM1206-M1306-M 2106%5CApplication_Notes%5CCell_Lock%20v3.pdf -- Des NowSMS Support | |||
| Ramón New member Username: El_miche Post Number: 24 Registered: 02-2008 |
Thanks, Des! I'll do some testing. xx value was 4.. so, i thintk that this a network operator problem. thanks for provide this PDF. Kind Regards! | |||
