Knowledge Base


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. RF When the receiver and transmitter in cellular terminal is ON, it receives and transmits radio frequency signals. 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. Serial Serial port is used for AT command communication, data transmission, GNSS NMEA sentences output, software, debugging, firmware upgrade and voice over USB. 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. 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). TCP/UDP Our modules provide the following socket services: TCP client, UDP client, TCP server and UDP server.
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About the Knowledge Base category 1 April 10, 2019
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Knowledge database policy: In this section, you will find useful technical information posted by Quectel Wireless Solutions technical experts. Please feel free to reply to the posts, as your feedback will allow us to im…

2 May 10, 2019
Getting started with BG96 and MCU through UART 3 October 9, 2019
What are the design considerations when using embedded antenna?
RF
4 October 8, 2019
Store and play audio files in a call 1 October 5, 2019
Designing Power Circuit for M95 GSM Module according to ATEX considerations 5 September 30, 2019
Does internal modem stack do DNS caching 4 September 29, 2019
Is it possible to use diode to convert 5V to 4.4V for power supply? 2 September 22, 2019
M66 modem: CME ERROR: SIM not inserted 6 September 10, 2019
What is CREG command meant to be? 4 September 10, 2019
How to match the UART level between MCU and module? 2 September 10, 2019
EC20 high power consumption 1 August 28, 2019
TCP/UDP BC95-G (NB-IoT) power usage 4 September 2, 2019
What is the audio output capability of the module? 2 August 29, 2019
What could be the reason why the call somehow hangs off when you use ATD to make a call? 2 August 29, 2019
Can the RF pin endure thunder stroke?
RF
2 August 28, 2019
What is the difference between CGDCONT and QICSGP? 2 August 23, 2019
What are the possible reasons for the failure of PPP dial up? 2 July 25, 2019
What is the lifetime of the module flash? 1 May 29, 2019
Can UTF8 and UCS2 coding scheme be supported in the MMS? Which one is better? 1 May 29, 2019
How to use PPP to dial up in the WIN7 OS? 1 May 29, 2019
Why the module responds error when sending some SMS commands at power-on stage?
SMS
1 May 29, 2019
How to deal with the incoming message when SMS memory space is full?
SMS
1 May 29, 2019
What is long SMS?
SMS
1 May 29, 2019
What is the maximum individual short message size?
SMS
1 May 29, 2019
What are the differences between text mode and PDU mode?
SMS
1 May 29, 2019
What is the maximum transmitting speed of GPRS?
RF
1 May 29, 2019
What is the impact if many modules work simultaneously and the antennas of modules are very close to each other?
RF
1 May 29, 2019
In which cases will module respond CLOSED? 1 May 29, 2019
Why the server has not yet received the data after the module responds “SEND OK”? 1 May 29, 2019