If music on-hold breaks, it drops the parked calls after 60 seconds.
We recently discovered that our calls are being dropped after 1 minute when parked. We then further realized that our on-hold music wasn't working because it was an mp3 file upload (used to work originally but broke later). After on-hold music was fixed, call drops were fixed as well.
When the line is silent, something somewhere assumes there is no data flowing and probably times out the session. Even if the issue is on the customer's router, I think it would be important to send a periodic tone signal which will keep the network session alive as well as tell the patient on hold that they're on hold and not have been dropped.
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Henry Levin
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