Scenario/Test Steps 1. ISP (TATA) VoIP trunk has 100 DIDs and DODs. Configure the SIP Register trunk in UCM A. The SIP Trunk number (pilot number) is 68010200. 2. UCM A and UCM B are connected via Peer Trunk. Keep Trunk CID, Keep Original CID, and Caller ID disabled in Peer Trunks. 3. UCM B has … Read more
Description This article explains the P-Preferred-Identity (PPI) Header in UCM’s INVITE message when UCM forwards the call from the extension to an external or mobile number. Test Steps Packet capture Outbound CID Priority TO vs Request Headers The Request-Line and To headers show the DID used by the PBX, eg. 8887771234 is the DID, it is … Read more
Description Call forward makes the remote working solutions more efficient and ensures continuity of business operation. This article describes the settings required to allow the forwarding of the original Caller ID of external numbers in Grandstream IP PBX UCM. 1. Make sure that the UCM has the latest firmware version 2. Make sure the following settings … Read more
Description Ghost calls will usually affect the phone level. You may find it annoying by getting authorized calls. You can increase the security on the affected phone by setting the following parameter to YES in Grandstream IP Phones – GXP16XX/17XX/21XX and HT8XX ATAs models. Validate Incoming Messages Check SIP User ID for Incoming INVITE Accept … Read more
Description This article describes the configuration steps on how to enable SFTP Data Sync in Grandstream IP PBX UCM with MAC OS. Step 1: Follow this guide to enable SFTP and allow File Sharing in your Macbook Step 2 Navigate to UCM’s Web UI > Maintenance > Backup > Data Sync and enter SFTP’s Administrator … Read more
Description When working with the UCM630X series, you may encounter a warning message labeled “Pending Delivery.” in GDMS. It is important to understand what this means and how it affects your device management. What Does “Pending Delivery” Mean? The “Pending Delivery” status appears when you attempt to assign parameters or settings to an offline Grandstream … Read more
Description This article suggests the settings for resolving the common issue – Unknown Caller ID in Grandstream ATA HT813. These parameters can be found under the FXO Port Page. 1. Adjust the Number of Rings from 1 to 4 2. Configure Caller ID Transport Type to Relay via P-Asserted-Identity if it is unable to detect … Read more
Description Upgrading the product to the latest firmware version allows the expiration date of Grandstream-authorized certificates to be adjusted automatically. Even with the certificate expired, the communication between the phones and clients might not be secure or fully encrypted but the device will still function. Downloads GEN 1 (SHA256) GEN 2 (SHA384)
Understanding the CPE Connection Failed Warning and How to Address It If you’ve encountered a CPE Connection Failed warning on your Grandstream IP phone, you might be wondering what it means and how to resolve it. In this article, we’ll break down the cause of this warning and provide a simple solution to prevent the … Read more
Description This article describes the call flow of Attended Transfer initiated by Grandstream GXP2135. VoIP packets and the phone’s Syslog messages will be discussed in this article. Call Flow a. Ext. 1001 dials Ext. 1007 b. Ext. 1007 puts the call on hold with ext. 1001 by pressing the Attn Transfer button on the Call … Read more