If you're with the same vendor as us (our vendor recently added the ability for manual inputs of WEB and TEL) your customers previously could upload WEB and TEL batches if you allowed uploading of NACHA formats. This caught us by surprise when looking at some reports. None of our customers have asked for specific codes, they just want ACH.
I like to think of SEC codes not as separate products, just subcategories of ACHs. Each code has its' own rules about who the ACH is between, the purpose of the ACH, and any additional rules that go along with that particular transaction. WEB and TEL transactions are also considered a higher risk than PPD.
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Any opinions expressed are my own and do not necessarily reflect those of my employer.