GPRS
Introduction
General Packet Radio Service is the first step to UMTS. With GPRS data is split in packages and transferred separately. At the recipient they are rejoined. The costs are hereby not calculated by the time span of the transfer but by the amount of transferred data. In addition the simultaneous transfer of data and speech is possible. The data transfer rate is up to 171,2 Kbit/s and thus more than double the speed of ISDN. The possible top speed is depending on the number of used channels. Here uplink and downlink channels may differ with 14,4kbps each. The more channels a phone supports the faster the data transfer. The possible combinations have been sorted into classes which are shown in the table below:
| Class | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. downlink channels | 1 | 2 | 2 | 3 | 2 | 3 | 3 | 4 | 3 | 4 | 4 | 4 | 3 | 4 | 5 |
| Max. uplink channels | 1 | 1 | 2 | 1 | 2 | 2 | 3 | 1 | 2 | 2 | 3 | 4 | 3 | 4 | 5 |
| Max. total channels | 2 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 8 | 10 |
| Class | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | |
| Max. downlink channels | 6 | 7 | 8 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | |
| Max. uplink channels | 6 | 7 | 8 | 2 | 3 | 4 | 4 | 6 | 2 | 3 | 4 | 4 | 6 | 8 | |
| Max. total channels | 12 | 14 | 16 | 8 | 9 | 10 | 10 | 12 | 10 | 11 | 12 | 12 | 14 | 16 | |
Internet
| Network Operator | T-Mobile | Vodafone | e-plus | O2 |
|---|---|---|---|---|
| APN | internet.t-d1.de | web.vodafone.de | internet.eplus.de | surfo2 |
| IP-Address | dynamic | dynamic | dynamic | dynamic |
| Primary DNS | 193.254.160.1 | 139.7.30.125 | 212.23.97.2 | 62.134.11.4 |
| Secondary DNS | - | 139.7.30.126 | 212.23.97.3 | 195.182.110.132 |
| Precedence Class | - | low | normal | low |
| Delay Class | - | 4 (best effort) | 4 (best effort) | 4 (best effort) |
| Reliability Class | - | 3 | 3 | ? |
| Peak Throughput | - | 64000 octet/s | 2048 kbit/s | 1000 octet/s |
| Mean Throughput | - | best effort | best effort | 100 octet/s |
| Dial-in Number | *99***1# | *99***1# | *99***1# | *99***1# |
| Country Number (TAPI) | 49 | 49 | 49 | 49 |
| User Name | egal | - | eplus | - |
| Password | t-d1 | - | gprs | - |
| RADIUS | PAP | CHAP | PAP | - |
| Modem configuration | AT+CGQREQ= 1,3,4,3,0,0 AT+CGDCONT=1, "IP","internet.t-d1.de" |
AT+CGQREQ= 1,3,4,3,7,31 AT+CGDCONT=1, "IP","volume.d2gprs.de" |
AT+CGQREQ= 1,2,4,3,9,31 AT+CGDCONT=1, "IP","internet.eplus.de" |
AT+CGQREQ= 1,0,0,0,0,0 AT+CGDCONT=1, "IP","internet" |
Prepaidcustomers of o2 ("Loop") have to use "pinternet.interkom.de" as APN. | ||||
WAP
| Network Operator | T-Mobile | Vodafone | e-plus | O2 |
|---|---|---|---|---|
| APN | wap.t-d1.de | wap.vodafone.de | wap.eplus.de | wap.viaginterkom.de |
| Primary IP | 193.254.160.2 | 139.7.29.1 | 212.023.097.009 | 195.254.160.2 |
| primärer Port | 9201 | 9201 | 9201 | 9201 |
| Secondary IP | - | 10.1.32.10 | 212.023.097.009 | - |
| Secondary Port | - | 9201 | 9203 | - |
| Timeout | - | 24 hours | - | - |
| User Name | t-d1 | d2 | eplus | - |
| Password | wap | wap | wap | - |
| RADIUS | PAP | CHAP | PAP | - |
| ||||
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