GSM Registration

GSM module registration flow

In the GSM module registration flow, it includes 3 parts of communication. First is Yeastar PBX or GSM gateways communicate GSM module via AT Command. On one leg of the communication, GSM module would communicate with the cellular network by specific protocol.
The third part is the communication between GSM module SIM card.

The general GSM module registration flow is like the following.

1. GSM module sends information query request the basic information like carrier name, SMS center number, bands support, IMSI and so on. If SIM card had been set with PIN, the GSM module needs to take the PIN to unlock the SIM.
2. SIM card returns the information the GSM module requested.
3. GSM module searches the available carriers within the bands it supports.
4. Cellular returns all the available carriers information.
5. GSM modules sends registration request to the first priority carrier with SIM card and GSM module identify information.
6. Cellular returns the registration result.

GSM module registration configuration

Check the setting that is related with the GSM module registration.

S-Series

• PIN Code: Enter the PIN code if needed.

• Carrier: Usually you just need the Automatic option. Unless the carrier is wrong, and you need to select the correct one.

GSM Gateway

• PIN Code: Enter the PIN code if needed.
• Network Type: Usually you just need the Automatic, unless you need to let it run on the specific network.
• Carrier: Usually you just need the Automatic option. Unless the carrier is wrong, and you need to select the correct one.
• Band: Usually you just need the Automatic, unless you need to let it run on the specific band.