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. 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. 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. Serial Serial port is used for AT command communication, data transmission, GNSS NMEA sentences output, software, debugging, firmware upgrade and voice over USB. PHB Read/write/search the phonebook entries from the current phonebook memory storage. Audio PCM interface is used for audio function with external codec, supports echo cancellation and noise suppression. 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. 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).
Topic Replies Activity
About the Knowledge Base category 1 April 10, 2019
Knowledge database policy

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
TCP/UDP BC95-G (NB-IoT) power usage 1 August 13, 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 could be the reason why the call somehow hangs off when you use ATD to make a call? 1 May 29, 2019
What is the audio output capability of the module? 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
Can the RF pin endure thunder stroke?
RF
1 May 29, 2019
What are the design considerations when using embedded antenna?
RF
1 May 29, 2019
What is the difference between CGDCONT and QICSGP? 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
What is the maximum value of the parameters returned by AT+QISACK? 1 May 29, 2019
What is the maximum length of data sent by AT+QISEND? 1 May 29, 2019
How many methods of receiving data under TCP/UDP connection? 1 May 29, 2019
What is the maximum length of APN? 1 May 29, 2019
What is the maximum length of TCP domain name? 1 May 29, 2019
How to configure/query phonebook number?
PHB
1 May 29, 2019
How to configure and query subscriber number?
PHB
1 May 29, 2019
What is the maximum time that the module responds OK after executing ATH to hang off a call? 1 May 29, 2019
How to set the caller ID and the Connected Line Identification Presentation (CLIP)? 1 May 29, 2019