Landline phone via cable modem - security risk?

[AZwaffelForAWaff]

Two main questions:

- If your landline phone is plugged into your ISP-provided cable modem that is also used for internet connection, does that mean VoIP is used by default?

- Is it more of a security/privacy risk for internet data if you use landline phone through ISP cable modem? Data packets are supposedly separated from phone calls, but the modem is still the same. I am concerned phone calls can somehow ID internet traffic, even if VPN is utilized correctly.

 

Side-question:

- Is it of any benefit to use DSL filter when connecting landline phone to cable modem?

[Karlston]

1 hour ago, AZwaffelForAWaff said:

If your landline phone is plugged into your ISP-provided cable modem that is also used for internet connection, does that mean VoIP is used by default?

 

I'd say so. Does the phone work when plugged in a normal phone socket? If not, and it works plugged in the cable modem, it's definitely using VoIP.

 

1 hour ago, AZwaffelForAWaff said:

Is it of any benefit to use DSL filter when connecting landline phone to cable modem?

 

No. DSL filters are only for copper lines when using DSL.

[Dodel]

10 hours ago, AZwaffelForAWaff said:

Two main questions:

- If your landline phone is plugged into your ISP-provided cable modem that is also used for internet connection, does that mean VoIP is used by default?

- Is it more of a security/privacy risk for internet data if you use landline phone through ISP cable modem? Data packets are supposedly separated from phone calls, but the modem is still the same. I am concerned phone calls can somehow ID internet traffic, even if VPN is utilized correctly.

 

Side-question:

- Is it of any benefit to use DSL filter when connecting landline phone to cable modem?

 

- If your landline phone is plugged into your ISP-provided cable modem that is also used for internet connection, does that mean VoIP is used by default? -   No.

 

- Is it more of a security/privacy risk for internet data if you use landline phone through ISP cable modem? Data packets are supposedly separated from phone calls, but the modem is still the same. I am concerned phone calls can somehow ID internet traffic, even if VPN is utilized correctly. - You're connecting to the internet, that's a security risk on it's own

 

Article: Wiki on VOIP : https://en.wikipedia.org/wiki/Voice_over_IP

 

Article: Detecting VoIP Traffic Based on Human Conversation Patterns : https://www.iis.sinica.edu.tw/~swc/pub/voip_traffic_detection.html

 

Side-question:

- Is it of any benefit to use DSL filter when connecting landline phone to cable modem? - You should always use DSL filter on a DSL Line.

 

"When devices are connected to DSL filters, the filters separate and manage the incoming signal of each device so that they don’t interfere with each other. Unlike dial-up Internet, this allows you to use the Internet and other devices such as a phone or fax machine at the same time without experiencing slower Internet speeds.

Basically, the filters turn your phone line into a two-lane highway: they keep the lower frequency lane open for phone calls and other low-speed data, and the higher frequency lane open for your Internet connection and other high-speed data."

 

https://www.centurylinkquote.com/resources/what-is-a-dsl-filter/