Merchant's customer service phone number.
This 10 character field contains the merchant customer service phone number without dashes or spaces. The initial "1" for long-distance or toll-free calls should be omitted. For instance, "8001234567" is acceptable, while "18001234567" or "1-800-123-4567" is not.
This property is only required when the IndustryType is set to itDirectMarketing, and will otherwise not be sent.