Don't know the difference between SIP or EDI ?    What is SIP ? SIP is the Schedule Input Program provided by GSA to you the vendor at no charge. The Vendor Support Center is here to provide you support with this program. This program is the source of getting your GSA/FSS catalog onto GSA Advantage!  What is EDI ? EDI is Electronic Data Interchange. Please contact a Value Added Network, software provider, or third party consultant to obtain their services. These services use various software packages so you must work directly with them to coordinate file submission. Contact the EDI help desk on 703-605-9444 for more information.