It is a VSP service that comes with an integral DID so Voxalot is registered with the full service. If the E61 is registered directly with the VSP then the DID works. I have noted that:
1 - Another VSP (
Aglow Alicom - Singapore Largest Store and Forward Fax Provider) have no problem with Voxalot, it register fine and calls In and OUT are opertional (same with DID attached)
2 - Even the ATA is not so reliable in ringing (sometime it does, somtime it doesn't)