I interpret this the same way. It doesn't say "recorded by us" or "recorded by us exclusively" but merely "may be recorded."
In fact the phrase "may be recorded" is open to interpretation and can mean both "we might record it" and "we give permission to record it."
Still, I wouldn't put it past some company to try the "you recorded us illegaly" tactic.
I take their "may be recorded" as telling me what the company consents to my doing.
At other times, companies are providing caveats, fineprints, and EULAs. Should phone calls be any different?