If you are setting up a GPS device to receive corrections from via a digital modem over as cellular network the Mount Point service provider will supply most of the settings you will require.
But the provider of the Cellular Service may have a few different parameters. The table below can help with some specific providers:
| Service Provider | Username (APN Login) | Password (APN Password) | Domain (APN Server) |
| Cingular | ispda@cingulargprs.com | CINGULAR1 | isp.cingular |
| Cingular | wap@cingulargprs.com | CINGULAR1 | wap.cingular |
| T-Mobile | user | wap | wap.voicestream.com |
| T-Mobile | user | wap | internet2.voicestream.com |
| Rogers | wapuser1 | wap | internet.com |
| Fido Canada | fido | fido | internet.fido.ca |
| AT&T | wap@cingulargprs.com | a | wap.cingular |
In the cellular modem PIN field, North American providers generally leave this blank.
It is a way a prohibiting unauthorized use. Europeans use this feature quite a bit.
James Johnston
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