I have the problem that a DECT phone behind a ATA190 does ring poorly. The ringtone is delayed, than it stops ringing, than it starts again after 5 seconds. Than the display goes into onhook mode. When you hook off you got the call.
It seems that the ringing signal issn´t recognized correctly from the DECT phone.
Cisco analogue gateways (ATA & VGs) don't tend to emit the required voltage (-48V) for ringing. Many devices are quite tolerant of this bad behavior by Cisco, but occasionally you find devices (Such as your Motorola DECT base station) that are a little bit more sensitive to ringing voltage.
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