Steren TEL-2414 Manual De Instrucciones página 32

IF YOU ARE SUBSCRIBER TO A DSL SERVICE (OPTIONAL)
If you receive high speed Internet through your telephone line (commonly
referred as DSL), and you are experiencing interference during
conversations, your caller ID features are not functioning properly, and you
are subscribed to DSL service from your telephone company, install a DSL
filter to the telephone line between the telephone base and the telephone line
jack (Steren 300-997).
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