Description Caller ID Number (CID) is a telecommunications feature that provides the recipient of an outbound call with the phone number of the caller. When you make a call, this service transmits your phone number, allowing the callees to see who is calling before they answer. This feature enhances communication by enabling callee to screen … Read more
Description Delayed ringing can be a frustrating issue. There is a delay of 12 to 17 seconds for inbound calls to connect from the PSTN to IP phones via the Grandstream FXO gateway HT8X1 and the IP PBX UCM63XX. In this article, we’ll explore some common causes of delayed ringing and provide troubleshooting tips to … Read more
Description When the Inbound Route’s Pattern is specified using a Direct Inbound Dialing (DID) number or the format _03x, the call fails with a prompt ‘The number you have dialed is invalid, please try again later.’ resulting in a 404 Not Found error returned by the Grandstream IP PBX UCM. Analysis Please enable UCM’s Syslog … Read more
Description This article describes the error of Account Registration Failed when logging in to Grandstream Wave Mobile using the UCM Remote Connect address, but it works in Wave Desktop and Wave Web. The error occurs when an invalid certificate is uploaded. Try these 2. Go to UCM’s UI > PBX settings > SIP Settings > … Read more
Description This article describes the steps to configure Ring Simultaneously on the same extension range of Grandstream IP PBX UCM63XX and Analog PBX. Scenario I have an extension range (200-300) in Panasonic Analog PBX and Grandstream PBX UCM6301. They connect with a PRI Gateway GXW4501 through a SIP Peer Trunk and E1 cable. When someone … Read more
Description Setting up a NAS server with Grandstream IP PBX UCM63XX provides a powerful and versatile solution for business needs. It centralizes and stores the data, and provides redundancy and reliable systems. How it works
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