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


Description This article describes common Analog or PSTN trunk issues that happen in Grandstream PBX UCM63XX/62XX/6510. A list of suggestions is stated to deal with different scenarios in the customer’s setup. Issue 1: Noise or Echo Issue 2: Caller ID not showing or Undetected 0000 Issue 3: FXO port status is not reflected correctly in … Read more

Delays in Receiving Inbound Calls (Analog/VoIP Trunk)

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 CallĀ ControlĀ option under the Value-added Features > API Configuration page is disabled. When this option is enabled, the UCM will wait … Read more