Slowness issue Grandstream GRP261X series

Hello everyone, I will share simple steps to solve the Slowness issue Grandstream Phone. The most popular phone models are GRP2612(P/W/G) and GRP2613.

GRP2612(P/W/G) Has 4 SIP accounts and 4 multi-purpose line keys, Dual switched auto-sensing 10/100 Mbps Ethernet ports with integrated PoE (GRP2612P & GRP2612W) and Dual switched auto-sensing 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE (GRP2612G).

Supports up to 4 SIP accounts and 6 multipurpose line keys, Dual switched autosensing 10/100/1000 Mbps Gigabit ethernet ports with integrated PoE is GRP2613.

How to Solve Slowness Issue Grandstream GRP261X series:

1. Disable CPE (TR-069) under System Settings.
2. Disable ‘Send SIP Logs’ and ‘Auto Recovery from Abnormality’ under Maintenance > System Diagnostics > Syslog.
3. Disable ‘User Web Access’ and ‘SSH Access’ under System Settings > Security Settings.
4. Disable ‘LLDP‘ and ‘CDP’ under Network Settings > Advanced Network Settings.
5. Disable IPv6 and screensaver if they are not used.
6. Remove VQRTCP server and settings.

If you have any suggestions/questions contact me.