Hi,
When you look at Anveo E911 on your OBi Dashboard does it say Anveo E911 for RingTo or something else. The for RingTo part is important. Anveo sells multiple E911 products. Anveo E911 for RingTo is the specific product required to be provisioned on your OBi before you will be able to provision your RingTo account. It is only available for purchase via the OBiTalk portal as part of the process of provisioning a RingTo account on an OBi for the first time.
Unfortunately, other Anveo E911 products will not work with RingTo. You might try contacting Anveo to see if they will convert your existing E911 product to the required Anveo E911 for RingTo. Anveo E911 for RingTo will work with GV as well because GV doesn't actually require E911 service at all. If Anveo won't convert your E911 product, you could delete your existing Anveo 911 service from your OBi then purchase Anveo E911 for RingTo as part of the process of provisioning your RingTo account. The additional cost would be $12.
FWIW my understanding is the E911 requirement is RingTo's, however, the method of providing that service was worked out between Anveo and Obihai.