0x01D7 Default Domain Name

Used in:
VoIP Protocol Configure message
VoIP Protocol Query message

Byte | Description
0, 1 | Tag 0x01D7
2, 3 | Length Variable
: | Value Null-terminated ASCII string for default domain

Voice over Internet Protocol. The delivery of voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public-switched telephone network (PSTN).
American Standard Code for Information Interchange