Most calls my obi 110 work fine. To a couple of specific numbers, a POTS landline and an ATT conference call #, callers report that I drop out, they hear silence while I am actually speaking.
Callers on the other end will say "hello hello" while I am speaking as they can't hear me. Reception is clear and no stutter or drop outs on my end are detected.
Thanks in advance for any suggestions...