Hearing A3 - Merlin 3070 Service And Maintenance Manual

TROUBLE ON ONE TELEPHONE
Hearing Symptoms
Outside caller intermittently has trouble hearing a user
User in a noisy room has trouble hearing outside or intercom calls or
hears excessive breath noises from himself or herself
User with off-premises telephone has trouble hearing
NOTE: Use this section only if you have isolated the problem to one voice terminal or
telephone (in other words, it is not a systemwide problem).
A3-3
A3-3
A3-4
A3-1