Analog Trunk

Common Analog Trunk issues in Grandstream UCM63XX/62XX/6510

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Description This article outlines common Analog and PSTN trunk issues encountered with Grandstream IP PBX UCM63XX/62XX/6510. It provides a list of suggestions to address various scenarios in customer setups. Issue 1: Noise or Echo Issue 2: Caller ID Not Showing or Displayed as 0000 Issue 3: FXO Port Status Not Displayed Correctly in Web Interface … Read more

Delays in Receiving Inbound Calls (Analog/VoIP Trunk)

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Description The users experience 10 – 20s delays when receiving inbound calls, either through Analog or VoIP trunk. Outbound and internal calls (between extensions) work as expected. The More You Know Please ensure that the Call Control option under the Value-added Features > API Configuration page is disabled. When this option is enabled, the UCM will wait … Read more