BT Indirect Channels (BTIC) is offering data backup as part of its Broadband Month promotion, which will run until 31 July.
Its DataSure service, which will be charged per gigabyte, will provide offsite incremental backup of data for small firms.
"DataSure is a great way for resellers to get recurring revenue from data backup," claimed Chris Jagusz, acting director at BTIC. "Why would you not talk to your customers about this?"
DataSure and similar applications are part of BTIC's plan to raise the number of its data products that resellers attach to digital subscriber line installations.
Jagusz said DataSure offers an alternative to onsite tape backup, but added that onsite backups are the best way to protect operating systems and applications.
Keith Humphreys, managing consultant at EuroLAN Research, said: "When I've talked to VARs about broadband, the biggest driver by far is replacing ISDN with something that costs the customer a predictable amount.
"After that, applications are the next thing. Offsite backup is very handy for SMEs, which are notoriously bad at backup."
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