[Hilo] Could we get a voice call during a TCP/SMTP//FTP/ data transmission? Can we continue the data transmission after the voice call is finished?
Answer: Yes. Module will freeze IP activities (SMTP/FTP/TCP, etc.) while VOICE. But please switch from data mode to command mode before you can answer the call.
For KSMTPUL service, there’s a linger timer which is defined by in <AT+KCNXTIMER>. So if you make a long time voice call, the SMTP connection may be disconnected after the expiration.
For KFTPSND service, there’s a linger timer but it’s fixed at 10800 seconds (3 hours). So if you make a long time voice call, the FTP connection may be disconnected also after the expiration.
For KTCPSTART service, no linger timer is started after the successful connection. So you can continue the TCP service after the voice call is finished.
Please note that normally there’re also some timers defined in remote SMTP/FTP server, so it’s possible the session be disconnected by remote.