sendcmd 1 DB p WLCInfo sendcmd 1 DB set WLCInfo 0 led_onoff 0 sendcmd 1 DB save Warning: This may overheat the chip. Use at your own risk.
sendcmd 1 DB set TelnetCfg 0 WanAccess 0 sendcmd 1 DB save If you manage multiple ZTE F6640s (apartment buildings, offices), manual typing is tedious. Use this Python script to automate Telnet commands.
sendcmd 1 DB p MgtServer sendcmd 1 DB set MgtServer 0 URL http://127.0.0.1 sendcmd 1 DB set MgtServer 0 PeriodicInformEnable 0 sendcmd 1 DB set MgtServer 0 Tr069Enable 0 sendcmd 1 DB save Annoyed by the blinking fiber light? Kill it: telnet zte f6640
The standard admin page at 192.168.1.1 (often with username user or admin ) allows basic tasks: changing the SSID, rebooting, and port forwarding. But the "super admin" credentials ( ZTE521 or telecomadmin ) are often locked, hidden, or changed by your ISP.
sendcmd 1 DB p DevAuthInfo Look for lines like: sendcmd 1 DB p WLCInfo sendcmd 1 DB
echo "c3VwZXJzZWNyZXQ=" | base64 -d Your ISP can remotely change your Telnet settings. Stop them:
telnet 192.168.1.1 8023 You made it. You are at the # prompt. Now what? Here is your command cheat sheet for the ZTE F6640 . 1. Extract the Super Admin Password (Most Valuable Command) The web GUI is locked because the ISP hides telecomadmin . Dump it via Telnet: Use this Python script to automate Telnet commands
sendcmd 1 DB p WLANRadio # Find your radio (usually Radio1 for 2.4GHz, Radio2 for 5GHz) sendcmd 1 DB set WLANRadio 1 TransmitPower 100 sendcmd 1 DB set WLANRadio 2 TransmitPower 100 sendcmd 1 DB save Before breaking something, dump the whole database: