Drop-outs when dialling from phone

My understanding is that indeed the filter is in main socket. I only found out when I changed my HH4 for a 5 and lost phone line, BB was OK, it turned out to be a fault with the filter. You may have a filter fault on the phone side of things.

Hi.. A bit confused by your post.. Do you have fibre access or ADSL over your twisted copper pair? (Remember BT Infinity FTTC and equivalent are still ADSL over your twisted copper pair phone line)

So if ADSL you will / should have at least a master socket or NTE with a filter in it. Do you hear a rushing sound when you use the phone and your ADSL link is up? You could always add another filter between phone / base station and master socket and see if anything improves.

The other thing I can think of, is that you mention a Siemens Gigaset type phone which is I believe a DECT phone. DECT phones are a little notorious for EMI. So is your base station or phones very close to a cable connected to your broadband access wiring other than than the filtered cable from your master socket?

Simon

It's a VoIP phone - possibly a Quality of Service (QoS) issue, where the broadband connection prioritizes the telephony connection above everything else, if only for a short period (but enought o cause an interruption)....

Would try to setup a subnet for voice and another subnet for data.

Mark - ok I have looked up now - the Gigaset C475 IP is a DECT phone that can use either  standard analogue or VoIP Ethernet connections. So which mode are you using the phone? Do you plug an ethernet lead into the base station or a phone lead?

Also if you can provide your typical broadband speed that would be useful to see what the issue is... 

If you are using VoIP  you might find the web throughput drops by either approx 30kbps to 100kbps (depending on VoIP codec) for the duration of the voice call but that should not make much of a difference unless a very slow speed broadband or your  broadband connection is already very busy.. The signalling to setup or change a call - usually SIP - should ideally be of a lower priority than the media (voice audio).

Aleg - setting up a separate subnet for the voice data and another for non voice data shouldn't be necessary for the home and may not be possible depending on the broadband router chosen. One would however still need to define the relative class of service (CoS) for the different subnets to allow one network a higher priority over another - or you are most likely no better off anyway - but if you did configure the subnets that way and setup ports on different subnets on the router switch ports or used switches and a router that support trunking and VLANs it could be a solution - although perhaps somewhat involved for the standard user.  

The usual method is to use the DSCP bits value in the packet header as set in the applications (i.e. VoIP phone or PC soft phone etc) to provide the QoS and allow the prioritisation of data queuing on the router/switch - DSCP is supported by many broadband routers that are stated to be VoIP compatible - and this is what David was referring to I think.

I used to have this problem when we had normal broadband from BT. It didn't happen all the time and seemed to only happen when we dialled out. Having changed to Infinity with new face plate in the house (fibre to cabinet), there is no need for filters and we have not had the issue since.

Hi there

Thanks for all the replies on this.  To answer your questions:

Do you have fibre access or ADSL over your twisted copper pair?

It's FTC.

Do you hear a rushing sound when you use the phone and your ADSL link is up?

No.

So is your base station or phones very close to a cable connected to your broadband access wiring other than the filtered cable from your master socket?

The base station is close to the master socket.  I could moving it as far away as possible from the master to see if this improves the situation.

So which mode are you using the phone?

DECT only

Do you plug an ethernet lead into the base station or a phone lead?

I have only used a phone lead, although I plugged in an Ethernet cable yesterday to do a firmware update, in the hope that it might solve the problem.

Also if you can provide your typical broadband speed that would be useful to see what the issue is... 

Download:  24.94Mbps, Upload:  9.16Mbps.

Really appreciate you all taking the time to reply to this topic - many thanks!

Mark

Mark - thanks - so I would go for the filter and the EMI options. Keep the DECT base station and phone away from your internal phone wiring (apart from the lead to base station) and try another filter on the phone lead.

Simon

Here, all voice, data and tv service comes into the house via one fibre optic connection.  The 'box' in the basement must regulate what goes where.  Without any ability of me as the homeowner to regulate it.

Our phones, tv "cable boxes" and the home modem/router all get connected via the same in-home coax cable.  The only thing I can control is the home modem/router, and downstream of it.  The phones and tv boxes just do their thing.

But I surmise that VOIP must be a small fraction of the total bandwidth available.