Most likely not compatible.
It's not a bad idea to replace it with a newer one anyways. They, along with microfilters, can burn out over time.
If you have an ADSL only POTS splitter and you get put on VDSL, you'd most likely get no sync, or lose sync quite frequently.
Techs are free in this case, so I wouldn't worry too much about it.
And NSS_tech, I --
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