O Canada! > Canadian > Canadian Broadband > VOIP does not work with dryloop, escially with Bell

VOIP does not work with dryloop, escially with Bell

Since you didn't specify how you wire your phones...

Did you wired the existing phone line directly to your PAP2T?
The same line that is receiving dry loop? (This won't work!)

or you are wiring your phones separately? (This is the right answer)

reply to dahu
Bell does not block VOIP traffic, since plenty of other user are doing this.

The SIP protocol for VoIP is not NAT friendly because the ATA will include its own IP address in the SIP packet contents and the NAT router doesn't change contents of packets, only source/destination IP addresses.

Some use the ATA as a combo of ATA and NAT router (with the ATA sitting on the internet side so it knows the internet IP address assigned to this line).

Another way to deal with this is to tell the ATA what the public IP address of the line is so that even though it sits on the NAT side, the ATA will embed the proper public internet IP address in the packets.

The above can be achieved in two ways. With a fixed Ip address you can embed it in the configuration of the ATA, or use a STUN server which allows the ATA to query an internet server to find out what its internet IP address is.

It is possible that you had initially had coded in your then current IP address as a fixed one and it worked, but when you changed lines and renegitiated a new IP, it then failed because your ATA didn't know your new IP address.

Moving to a dry loop should not make any different versus a wet loop. Moving from cable to dry loop makes a difference because cable gives you a generally more stable IP address (despite it not being fixed) than with DSL.

reply to kovy
Many thanks for your comments. But how can you explain these behaviors?
1- the same setup working just fine, before Bell come and change to dry loop. After they change, problem happens.
2- the same setup (modem+router+PAP+phone) that works at my ISP place, but not at my home line (even though the internet at 6M).

I did the VOIP for my dad few month ago, but with cable (Videotron), and it works fine from the first day!!!

My friend says problems always in the first month of inscriptions with Bell. My suspect is that Bell tries to fool people for the first few weeks and then it goes back to normal. During this time there might be some people disappointed and go back to them. Maybe I should just wait for another 2 weeks, and the problem just "resolved" by itself?

It is embarrassing...

reply to jfmezei
Thanks for the comment jfmezei. It gave some hints. I believe we never have static Ip with Bell.
- I was with Bell phone before; and this time just change to dryloop since I found it cool. People say it should have no impact ...
- I did some tricks:
++ I change the static IP on PAP => not work
++ I change the static IP on PAP, and change the port forwarding on the router (NAT) => the modem never get connected.
++ Also some other few things, but never works.
Every time I change I keep a copy of the default parameter so that I can come back to the original setup.

Bell guy probably hooked the dry loop into your internal wiring, they should be separated if you want phones throughout the house.

Hum, they never came in my house ...

reply to exseven

I agree. I don't think I have physical problem (i.e. wire, connection etc.) since I got the internet working. The problem should reside at the network layer in which VOIP packet was lost due to not being routed probably or discarded or jammed. Is there any way to check this? Thanks.

Who is your ISP now, and who was your iSP before you had the dry loop ?

You really do need to disconnect your POTS line from the dry lop line. The line between the ATA and your phones must not be connevted to the dry line. (your ATA generates high voltages to ring your phones for instance)

dry loop and wet loop are the infastructure type, but the internet coming out of your dsl modem should be exactly the same regardless of which loop you have. you must not be telling us something else?
--
Happiness is like peeing your pants... Everyone can see it, but only you can feel its Warmth!!

reply to dahu
ATA in general have a lot less power to ring your phone. Check the Ringer Equivalence number (REN) usually next to FCC/IC sticker on your phones especially the old one.

»en.wikipedia.org/wiki/Ringer_equ···e_number

Thanks for all advices.
The PAP2T spec says it supports max 3REN. My phone has 1REN. How can I control this load from my PAP2T?

is the copper line between the ATA and your phone connected to the dry line ?

is the copper line between the ATA and your phone still connected to the old telephone line ?

It really needs to be disconnected from any line leaving your building. Your ATA may not have the power to drive such a long loop that goes between your house and the central office.

reply to dahu
Your ATA can easily handle the 1 REN as it is less than 3 REN.

reply to jfmezei
Hi JF. No, there is no other line connects to ATA. The distance from ATA to phone is about 1m, and direct. Only 1 connection.