Description No ‘ringback tone’ issue on outbound calls occurs when the PBX or UCM receives 183 Session Progress (with SDP) first and then 180 Ringing later from the SIP Service Provider (ITSP). It would be a 183 Session Progress message to play the ‘Early Media’ on the caller’s phone. Also, missing SDP in 183 Session … Read more
Issue Grandstream IP PBX UCM does not call the invitees with external numbers, but it works with extensions during the scheduled meeting. How to UCM calls out using the Meeting Room Number during the scheduled meeting. Make sure that you enter the _x. or _meeting_room_number under Outbound Routes > Source Caller ID Pattern
Scenario There is no audio issue in the calls between IP Phones using UCMRC. However, audio works when the call is established between the Wave app and the IP Phone with the same registered extension. Solution The “Strict RTP” option cannot be enabled while using the remote domain address of UCMRC services. When using the … Read more
Description This article describes the call disconnection issue in Grandstream FXO Gateway GXW410X and the steps to capture the logs for troubleshooting. Most of the time, we have seen that FXO Gateway does not detect busy tones correctly causing the calls to hang up. Case 1 :If there are no busy tones heard over the … Read more
Description Grandstream Wave is a softphone application that allows users to make and receive phone calls over the internet using a computer, smartphone, and web browsers. This article describes the troubleshooting steps when the application crashes on iOS devices (such as iPhones and iPads). 1. Go to iPhone > Settings > Wave > Disable Contacts. … Read more
Description If you face a buzzing sound issue when answering calls with a Grandstream Analog Telephone Adapter HT8XX series, here are the steps to work around the issue: How to The FXS port of the HT8XX ATA does not detect the OFF-HOOK action and stops the ringing. Here are some undocumented P values that may … Read more
Description Slowness in IP phones can be attributed to various factors. This article suggests the troubleshooting steps to address slowness and sluggish issues in Grandstream GRP2612 or GRP2613 IP Phones: 1. Disable CPE (TR-069) under System Settings 2. Disable ‘Send SIP Logs’ and ‘Auto Recovery from Abnormality’ under Maintenance > System Diagnostics > Syslog 3. … Read more
Description This article describes the required information to capture for various issues in Grandstream GWN76XX access points before submitting a helpdesk ticket. This helps the product support and development teams to understand and resolve the issue more quickly and efficiently. 1. Description of the issue (required) Clearly describe the issue you are facing with the … Read more
Description Syslog is a powerful tool for monitoring and troubleshooting network and system issues. This article describes the Syslog and Packet Capture settings of different Grandstream models. IP Voice Telephony GXP16XX,GXP17XX & GXP21XX GRP260X GRP261X WP810 Click here to find out more on how to use internal Syslog capture in WP810. DP75X/DP72X Facility Management GDS3710 … Read more
Description In India, there are several telecom service providers that offer SIP trunking services to businesses and organizations. This article describes call establishment issues with Grandstream IP PBX UCM and SIP Trunks in India and suggested settings to resolve them. Case 1: Call drop due to 422 Session Interval too Small (BSNL) Figure 1: UCM’s … Read more