Knowledge Base


Serial Serial port is used for AT command communication, data transmission, GNSS NMEA sentences output, software, debugging, firmware upgrade and voice over USB. RF When the receiver and transmitter in cellular terminal is ON, it receives and transmits radio frequency signals. Power Power design for the module is very important, as the performance of the module largely depends on the power source. Audio PCM interface is used for audio function with external codec, supports echo cancellation and noise suppression. PHB Read/write/search the phonebook entries from the current phonebook memory storage. SIM Card In order to enhance the reliability and availability of the (U)SIM card in customers’ applications, please follow the criteria from our hardware design note in (U)SIM circuit design. TCP/UDP Our modules provide the following socket services: TCP client, UDP client, TCP server and UDP server. Call In order to make or receive a call, the cellular terminal must be switched on in a service area with adequate cellular signal strength. SMS The format of messages can be either PDU mode (entire TP data units used) or text mode (headers and body of the messages given as separate parameters). PPP / MMS / FLASH All subjects related to procedures for PPP setup and termination, modes for PPP connection, MMS application interface for sending messages including multimedia objects (image, audio, rich text, etc.), internal flash.
Topic Replies Views Activity
1 1044 January 20, 2021
1 46 July 16, 2024
20 353 May 10, 2024
3 146 May 7, 2024
1 163 April 12, 2024
2 810 March 8, 2024
2 849 February 23, 2024
1 149 February 14, 2024
2 287 February 1, 2024
10 417 January 22, 2024
1 377 December 22, 2023
8 741 November 22, 2023
2 270 November 15, 2023
1 529 August 16, 2023
2 738 July 21, 2023
1 502 June 19, 2023
2 966 April 18, 2023
13 2587 March 22, 2023
3 1680 March 8, 2023
3 1037 January 25, 2023
4 1908 January 18, 2023
1 1080 October 14, 2021
3 1457 December 13, 2022
3 776 December 8, 2022
13 5910 November 9, 2022
1 766 July 7, 2022
2 501 May 14, 2022
2 1036 April 22, 2022
3 884 March 31, 2022
2 1223 February 17, 2022