Yes, the PAP2T-NA supports it but it is EOL/EOS since 2013. Just brought it in the conversation as saw it mentioned in other forums and have seen it installed on some cybercafes/parlors (phone cabins).
Your proposed solutions sounds very suitable for the case. If I do the job for the client and an ATA adapter is required maybe will use the Cisco ATA191-3PW-K9 (as a recent replacement for the former Cisco model). My providers have it in stock (as well as some Grandstream models).
Thanks.
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