How do I make and receive FM quality landline calls over fttp?

[fiberfan]

As subject. Someone I know calls me on my mobile from his BT digital voice phone - call quality is FM or HD quality as advertised.  Is this possible to achieve my end with my future Vodafone fttp landline with the right compatible phone or not ? 

[Jayach]

As per your other posts, if you use a DECT phone connected to the TEL port on the router, it should achieve what you want. The phones will be digital both ends, the connection between the DECT base and the TEL socket will be analogue, but shouldn't reduce the quality significantly. [Removed]  

 [MOD EDIT: This post has been edited to remove inappropriate content please see Community Guidelines]

[fiberfan]

 [Removed]  Maybe you can't comprehend what FM quality speech means which a standard 20 year old DECT phone is unable to archive it seems but a BT DECT or VOIP phone does  

[MOD EDIT: This post has been edited to remove inappropriate content please see Community Guidelines]

[Ripshod]

If all you want is BT quality phone calls then maybe you should stick with BT. A cut price ISP like vodafone clearly can't satisfy your demands. 

[fiberfan]

As subject. Someone I know calls me on my mobile from his BT digital voice phone - call quality is FM or HD quality as advertised.  Is this possible to achieve my end with my future Vodafone fttp landline with the right compatible phone or not ? 

[ritz]

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@fiberfan wrote:

As subject. Someone I know calls me on my mobile from his BT digital voice phone - call quality is FM or HD quality as advertised.  Is this possible to achieve my end with my future Vodafone fttp landline with the right compatible phone or not ? 

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Depends on the phone you'll be using and the capabilities of the VF VoIP server to negotiate and terminate wideband codecs. From my recent experience, inbound calls from the mobile network to the VF voip server will offer 3 codecs to the SIP endpoint (your landline phone):

- AMR (G.722.2 wideband, widely used on VoLTE environments)

- PCMA (narrowband uncompressed 64kbit)

- G.729

I never managed to negotiate an AMR call with the mobile network as the WP820 I am using does not have the codec available.

My outgoing calls from the WP820 on VF VoIP were only offering 2 codecs (PCMA and G.729) so not really 'HD'.

The BT forums may have more knowledge on the subject, specifically on what HD means on their VoIP phones for landline-to-landline calls.

('HD' was GSMA-certified on the mobile networks, not sure if it means the same in VoIP, let alone VF VoIP...)

[Jayach]

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@fiberfan wrote:

 [Removed]  Maybe you can't comprehend what FM quality speech means which a standard 20 year old DECT phone is unable to archive it seems but a BT DECT or VOIP phone does  

[MOD EDIT: This post has been edited to remove inappropriate content please see Community Guidelines]

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I fully understand what you mean by FM quality speech, DECT standards have changed in the last 20 years, and they are completely capable of it. The BT phones you seem so keen on are DECT, so I don't understand your comments.

Mods: I don't know why my comments previously were removed, I just explained that human speech is analogue, so no conversation can be fully digital.

[Cynric]

DECT has, like many other wireless protocols, improved a lot in the last 20 years. 

[fiberfan]

Vodafone have just said FM voice quality is not available only BT offers this - shame oh well 

[Cynric]

@fiberfan  Have you a link to that statement?