Description: The Vendor Code (also called the Terminal Provider Code) in the NSF code is a two-byte field identifying the manufacturer of the group 3 fax equipment with non-standard capabilities.

If the fax relay capability of the gateway is limited to the ITU T-series protocol, the value of the t38NSFVendorCode object is to be written into the Vendor Code (Terminal Provider Code) field to preclude non-standard synchronization of the group 3 fax terminals.

Since a value of 0x0000 refers to Compression Labs, it cannot be used to disable non-standard synchronization. The t38NSFVendorCode value used to override NSF-based synchronization is 0x0051 (81). To realize NSF suppression, this is used in conjunction with the appropriate Country Code referring to the United States, and in conjunction with the setting of all bytes in the Terminal Provider-Oriented Code field, which describes the manufacturer-specific capabilities, to zeros.