Hi Dave:
Typically, this means that the "there is a message waiting" flag on one of your device's SP1--SP4 slots is set on, and somehow got stuck without being cleared. OR, it's a legitimate status, and one of your service providers actually does have a message waiting.
To eliminate the first cause:
- Sign into your OBiTALK portal dashboard: https://www.obitalk.com/obinet/pg/obhdev
- Click on your OBiTALK device, and follow the steps to get into expert configuration mode.
- On the expert page, scroll down and click on Voice Services-->SP1 Service.
- On that page, find the parameter labeled "MessageWaiting". It should NOT have a check mark in the value box. If it does, then that's the culprit. Remove the check mark. Note that you must first UN-check BOTH boxes to the far right of the parameter row, before it will allow you to change the value. Scroll down and click Submit. Wait for the device to reboot.
- Pick up the phone. Is there still a stutter tone? If so, then repeat the above steps for SP2, SP3 and SP4, until you find the one with the check mark and remove it. Remember to submit the change every time.
If that doesn't fix it, then you actually do have a message waiting on one of your SPs, or that provider has the bit stuck on at their end.