Callers say they cannot hear me (by 3 users)

we also have the same problem on nec electra elite 1pk with dterm80 phones and vmp voice mail. the tech who installed it said the volume was already cranked up in the system. i have all the software from the tech but still researching before i connect and access the system.
same problem at previous location.
odder still, our previous phone system of different brand at two other locations had the same problem and bell canada (provides the lines) and other techs could not fix it.
are we just unlucky getting quiet phone lines or is there such a thing?

we also have the same problem on nec electra elite 1pk with dterm80 phones and vmp voice mail. the tech who installed it said the volume was already cranked up in the system. i have all the software from the tech but still researching before i connect and access the system.
same problem at previous location.
odder still, our previous phone system of different brand at two other locations had the same problem and bell canada (provides the lines) and other techs could not fix it.
are we just unlucky getting quiet phone lines or is there such a thing?