User's Manual

Polycom CMA System Operations Guide
510 Polycom, Inc.
Note
The total number of digits specified for an E.164 numbering scheme (alias) must be
15 digits or less. If a user’s phone number is assigned to the Base Field, the system
reserves one digit to differentiate between the user’s multiple devices. In this case,
the total number of digit cannot exceed 14 digits
The E.164 number generation is only applicable to dynamically-managed
endpoints.