This excerpt taken from the VRSN 10-K filed Jul 12, 2007.
4. SUPPORT SERVICES
4.1. Engineering Support. VNDS agrees to provide Registrar with reasonable engineering telephone support (between the hours of 9 a.m. to 5 p.m. EST or at such other times as may be mutually agreed upon) to address engineering issues arising in connection with Registrars use of the System.
4.2. Customer Service Support. During the Term of this Agreement, VNDS will provide reasonable telephone and e-mail customer service support to Registrar, not Registered Name Holder or prospective customers of Registrar, for nontechnical issues solely relating to the System and its operation. VNDS will provide Registrar with a telephone number and e-mail address for such support during implementation of the Supported Protocol, APIs and Software. First-level telephone support will be available on a 7-day/24-hour basis. VNDS will provide a web-based customer service capability in the future and such web-based support will become the primary method of customer service support to Registrar at such time.