ppapi
join:2005-04-28
Austin, TX
| VoIP moving from cable to DSL, need some help
Good morning. I just moved from Roadrunner to SBC Yahoo DSL. If I connect my Lingo VoIP adapter to the Cable modem, it works fine, but if I connect it to the DSL modem, I get the "dial tone", but when I place a call, I get a busy signal.
Do you know if there are some configuration changes that should be done to Lingo when switching from Cable to DSL ? May be a firewall issue ?
thank you
Paolo |
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buddahbless
join:2005-03-21
usa/canada
| ppapi..
I noticed I have the same problems at times when I go from my house to my friends(although mines is reversed). I have SBC DSL, and he has WOW HSI Cable. I Have to hard reset my device along with his cable modem at the same time for it to work and be able to make calls, and then do the same thing when I get back to my house. seems these devices looses there config. when they travel from one IP address to another. hopefully this will help. It beats having to make the call to lingo every time I travel with it and hook it up some where else.(Note: I have the dlink-1402 so not sure if it will fix your device but worth a try). My SBC modem is the Speedstream one. |
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M00T
join:2005-01-19
Vienna, VA | reply to ppapi
You have dial tone, but you probably don't have an IP on the device.
Log in, and check what IP it obtained from the modem. Without an IP, you won't get jack... despite the dial tone. |
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ppapi
join:2005-04-28
Austin, TX
| Thanks for your reply, but I'm not an expert, so I need to ask a clarification. Login to what ? To the Lingo adapter ? If so, how can I do that ? Or you mean login to the modem ? Sorry if I ask something stupid, but I repeat, I'm not an expert.
Thanks
Paolo |
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M00T
join:2005-01-19
Vienna, VA
| reply to ppapi
Did you not receive an install guide with your Lingo adapter?
1. From cmd prompt, type "ipconfig /all"
2. Figure out what the default gateway is
3. Put the default gateway IP address into your webbrowser and login.
4. Look for "WAN" and find out what the IP is.
If you can't figure it out with those instructions, you are better off calling lingo for help. |
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jeckler
join:2005-04-11
Mesa, AZ
 ·Vonage
| reply to ppapi
DSL typically uses PPEoE to authenticate, cable does not. Usually with cable it's plug and play (at least when you get one outta the box). With DSL, you'll need to log into the router and set up PPPoE.
When you signed up with DSL, did they tell you what username and password to use? |
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ppapi
join:2005-04-28
Austin, TX
| Thanks for your reply. Yes, I do have the id/password for the DSL authentication, but I think the problem is different: I understand that the Lingo adapter would require PPEoE if it was the first device connecting to the DSL, but I'm experiencing something different, I think.
My DSL modem is also router in the same box (it is called Home Portal) with 4 ethernet ports: once DSL is connected, if you plug an additional computer in one of the remaining 3 ports, it works immediately because things are open to the internet (because already autheticated). But if in this situation I just plug the Lingo adapter (so, it shouldn't require authentication), I get the dialtone, but when I place a call, I get the busy signal. This is why I think the problem is different than enabling the PPEoE authetication.
Every additional suggestion would be appreciated.
Thanks
Paolo |
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M00T
join:2005-01-19
Vienna, VA | Most combo router/modems that i've dealt with, have a built in firewall. It's probably blocking your SIP traffic. You'll need to login to it, and turn off the firewall. |
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ppapi
join:2005-04-28
Austin, TX | Thanks ! I'll try that and let you know
Paolo |
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DrTCP
Yours truly
Premium,ExMod 1999-04
join:1999-11-09
Round Rock, TX
| reply to M00T
said by M00T  :Most combo router/modems that i've dealt with, have a built in firewall. It's probably blocking your SIP traffic. You'll need to login to it, and turn off the firewall. Normally it should not be necessary to open holes manually. Your ATA will punch a hole through. My ATAs are behind ZyWALL 70 firewall router and I did not have to manually forward ports etc or make anything special in firewall configuration (default config allows LAN hosts to make outbound connections)
The only problem is when you are behind a symmetric NAT implementation (as opposed to cone NAT) and the router/firewall does not have specific SIP support. If this is true, the ATA needs an outbound SIP proxy. Outbound SIP proxy acts as a relay station for either party.
If a type of Cone NAT is used, only a STUN server needs to be specified in the ATA. Any accessible STUN server is OK. Through the STUN server ATA will learn the external IP and port and setup communication properly. STUN is not used for subsequent connections.
However, I think it is possible that none of these are actually the issue. It could be simple as ATA has not obtained an IP properly or is unable to resolve DNS names. Access to an ATA status page will answer these question right away. |
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ppapi
join:2005-04-28
Austin, TX
| Goor morning everyone. I solved my problem: it was a firewall issue. My 2Wire HomePortal assigned the IP address to the Lingo adapter, but when Lingo was trying to establish a call (it uses many ports) the firewall was blocking them. I solved putting the Lingo device in the firewall DMZ, and things now work very well.
BTW, I moved from Timewarner RoadRunner cable to SBC Yahoo DSL "Pro": it works so well now !
Paolo |
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DrTCP
Yours truly
Premium,ExMod 1999-04
join:1999-11-09
Round Rock, TX
1 edit | said by ppapi :Goor morning everyone. I solved my problem: it was a firewall issue. My 2Wire HomePortal assigned the IP address to the Lingo adapter, but when Lingo was trying to establish a call (it uses many ports) the firewall was blocking them. I am glad it is working now. As I said, it is normally not necessary to forward ports or DMZ your adapter. It must be the implementation of NAT on your gateway in combination with the lack necessary tools (outbound proxy or STUN depending on the type of NAT) to solve this problem. |
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