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In addition to the HT5xx ATA mentioned in the article, the newer Grandstream ATAs (at least the HT7/8xx models) also support pulse dialing. One issue that can
by tomatocracy 2y ago
In addition to the HT5xx ATA mentioned in the article, the newer Grandstream ATAs (at least the HT7/8xx models) also support pulse dialing.
One issue that can come up though is that they effectively have tighter tolerances than old mechanical exchanges did for timings, so sometimes an older rotary phone can have timings which are within the official tolerances of the time for the local market but outside tolerances for US standards (digital pulse dialing phones are usually within spec for both because the tolerance ranges overlap).