Cortelco 8012 用户手册
23
DSL Interference
If the 8012 is used on a line with DSL service, it may be necessary to install a noise
filter. A filter may be obtained from the DSL provider. It should by used if noise is
heard during conversations or Caller ID is not functioning properly.
filter. A filter may be obtained from the DSL provider. It should by used if noise is
heard during conversations or Caller ID is not functioning properly.