Problems with analog port going into a Bogen PCM paging unit

[Tripoth]

Have a PCM kit with a talkback module, so we have to use a station port instead of the paging port.
MiVoice 250

PCM unit needs close to 90vAC ring.
Analog port off MiVoice comes out at about 68v and someone at tech support site says the range for the port would be 50v to 105v.
Wide range and doesn't fit the bill.
Picked up a ring amplifier to boost the ring to 90

Call the extension to test and it just rings with no answer. Bogen PCM does not pick up.

Might it be that the ring cadence is too short from the MiVoice or something else?

 

[OldTimingMan]

I'm not familiar with the 250, but you may be on the right track. Earlier Mitels were set up to provide a long ring for outside calls and two shorter rings for internal calls. I remember a COS setting to make all calls ring the longer version.