Cullen, Vijay,
I was checking your I-D and RFC 3969 (for sip parameter registration) and found that the "Yes/No" assignments in this I-D's "Predefined Values" column is different from those in RFC 3969.
In RFC 3969, for example, "ttl" has value "No" because that parameter does not have any "registered" value, although it can contain a value to indicate TTL length.
In your I-D, the assaignments of "Yes" or "No" for the "Predefined Values" column are based on if the parameter is a flag or not.
Since the purpose of the I-D is to register "values" to avoid duplicated assignments, any tel URI parameter that does not require registration of predefined value(s) should be assigned "No" in Table 1.
James
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