Phone Constraint in SQL

To Add Constraint to Any SQL Table Phone Column use following Script. 

ALTER TABLE [dbo].[Employee]  WITH CHECK ADD  CONSTRAINT [Ck_Phone_Employee]
CHECK  

(

[Phone] like '[1-9][0-9][0-9][-][0-9][0-9][0-9][-][0-9][0-9][0-9][0-9]' OR
[Phone] like '[1-9][0-9][0-9][-][0-9][0-9][0-9][-][0-9][0-9][0-9][0-9][*][0-9]' OR
[Phone] like '[1-9][0-9][0-9][-][0-9][0-9][0-9][-][0-9][0-9][0-9][0-9][*][0-9][0-9]' OR
[Phone] like '[1-9][0-9][0-9][-][0-9][0-9][0-9][-][0-9][0-9][0-9][0-9][*][0-9][0-9]
[0-9]'
OR
[Phone] like '[1-9][0-9][0-9][-][0-9][0-9][0-9][-][0-9][0-9][0-9][0-9][*][0-9][0-9]
[0-9][0-9]' 
OR
[Phone] like '[1-9][0-9][0-9][-][0-9][0-9][0-9][-][0-9][0-9][0-9][0-9][*][0-9][0-9
][0-9][0-9][0-9]'

)
GO

ALTER TABLE [dbo].[Employee] CHECK CONSTRAINT [Ck_Phone_Employee]

GO

This will Add Constraint with Phone Extension. Use Data Type Varchar(18) for Phone Column