Articles in this category Using the Soft Phone (Ringotel) Overview A soft phone is an application that allows you to make and receive phone calls using your computer or mobile device instead of a physical desk phone. It works over the internet and provides t... Grandstream GRP261x / GRP2624 / GRP2634 – Quick User Guides USING THE HEADSET OR SPEAKER How to Change the Ring Tone on a Grandstream GRP Phone Overview This guide explains how to change the ring tone on a Grandstream GRP series phone using the keypad and on-screen menu. Steps to Change the Ring Tone 1. Access the Menu When the phone is idle... Setting the Time Zone on Grandstream Phones Overview This article provides step-by-step instructions for configuring the date, time, and time zone on Grandstream wireless and desk phones. Ensuring the correct time zone is set is important for a...