I have an older (16 yrs old - upgraded in 2006) Partner ACS 4.0 system with (2) 308EC R3.0 cards. There are 5 lines and 24 extensions. The system is connected to a UPS. Most of the phones are MLS-12s and MLS-12Ds with a few MLS-6 and two MLS-34Ds.
Over the past two months one MLS 12 and 4 MLS...
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