The written agreement or plan wording applies to an agreement between the bank and its customer that the bank will accept telephonic instructions to effect EFTs (usually transfers). Usually, these are part of a Telephone Response System.
The scenario that you've described, M&M, would be an EFT because it is initiated via the ACH and debits a consumer account. The fact that it was authorized by a telephone call is incidental to whether it's an EFT.
_________________________
John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8