Tom Lowe
2003-Dec-03 17:23 UTC
[Asterisk-Users] Echo problem on conferencing....no analog interfaces
Okay...here's one for all of you.... 3 party meet-me conference: Call 1: Comes in to MyAsterisk on an E1 PRI into the system. All TDM, no VoIP at all involved. No echo at all. Call 2: Call comes in via IAX....(TDM -> Asterisk_1 -> IAX/GSM -> MyAsterisk. Caller immediately hears his own echo Call 3: Call comes in via IAX....(TDM -> Asterisk_1 -> IAX/GSM -> MyAsterisk. Caller hears no echo at all. (Caller 2 and 3 called the same telephone number....caller 2 is in the same state (NJ) and caller 3 is in California) Caller 2 hung up and called back in....still hears echo. Any ideas? Are there any settings that anyone can suggest to try? Tom
David Gomillion
2003-Dec-03 18:53 UTC
[Asterisk-Users] Echo problem on conferencing....no analog interfaces
Silly question: what kind of phone was the person in California calling on? Some phones give a local "echo" while you talk. If that happens, then I could see it causing problems... Just a thought... I hope it helps! -----Original Message----- From: asterisk-users-admin@lists.digium.com [mailto:asterisk-users-admin@lists.digium.com] On Behalf Of Tom Lowe Sent: Wednesday, December 03, 2003 6:24 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Echo problem on conferencing....no analog interfaces Okay...here's one for all of you.... 3 party meet-me conference: Call 1: Comes in to MyAsterisk on an E1 PRI into the system. All TDM, no VoIP at all involved. No echo at all. Call 2: Call comes in via IAX....(TDM -> Asterisk_1 -> IAX/GSM -> MyAsterisk. Caller immediately hears his own echo Call 3: Call comes in via IAX....(TDM -> Asterisk_1 -> IAX/GSM -> MyAsterisk. Caller hears no echo at all. (Caller 2 and 3 called the same telephone number....caller 2 is in the same state (NJ) and caller 3 is in California) Caller 2 hung up and called back in....still hears echo. Any ideas? Are there any settings that anyone can suggest to try? Tom _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users
Tom Lowe
2003-Dec-03 20:28 UTC
[Asterisk-Users] Echo problem on conferencing....no analog interfaces
Not a silly question. I've given that thought. To be honest, I'm not sure what kind of phone the California or NJ callers were using. However, we've had numerous conferece calls using many other services and have never had echo problems. The problem, in this case, more likely has something to do with the NJ leg of the call (call 2), and possibly my leg (I was caller 1), since the echo happened when it was just the two of us. If anything, the "problem phone" would be my phone. This is a Lucent Partner phone system and phone. Now, if it was MY phone causing the problem, then both caller's 2 and 3 should be hearing their echo. But they weren't. I'm stumped. For anyone who's trying to figure out how I'm doing an E1 PRI here in the US, it's working like this: Verizon T1/PRI --> Cisco VCO/4K (Programmable switch) --> E1/PRI --> MyAsterisk The other 2 calls are going like this: 888 number --> SS7 --> VCO/4K --> T1/PRI --> Asterisk_1 --> IAX --> MyAsterisk Tom Tom Lowe, President/CTO Compro Technologies, Inc. 512 South Main Street Forked River, NJ 08731 My Phone: +1-212-904-0788 Main Phone: +1-609-242-2211 Fax: +1-609-242-2212 Email: tom@comprotech.com Web: www.comprotech.com -----Original Message----- From: David Gomillion [mailto:dgomillion@eyecarenow.com] Sent: Wednesday, December 03, 2003 8:54 PM To: asterisk-users@lists.digium.com Subject: RE: [Asterisk-Users] Echo problem on conferencing....no analog interfaces Silly question: what kind of phone was the person in California calling on? Some phones give a local "echo" while you talk. If that happens, then I could see it causing problems... Just a thought... I hope it helps! -----Original Message----- From: asterisk-users-admin@lists.digium.com [mailto:asterisk-users-admin@lists.digium.com] On Behalf Of Tom Lowe Sent: Wednesday, December 03, 2003 6:24 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Echo problem on conferencing....no analog interfaces Okay...here's one for all of you.... 3 party meet-me conference: Call 1: Comes in to MyAsterisk on an E1 PRI into the system. All TDM, no VoIP at all involved. No echo at all. Call 2: Call comes in via IAX....(TDM -> Asterisk_1 -> IAX/GSM -> MyAsterisk. Caller immediately hears his own echo Call 3: Call comes in via IAX....(TDM -> Asterisk_1 -> IAX/GSM -> MyAsterisk. Caller hears no echo at all. (Caller 2 and 3 called the same telephone number....caller 2 is in the same state (NJ) and caller 3 is in California) Caller 2 hung up and called back in....still hears echo. Any ideas? Are there any settings that anyone can suggest to try? Tom _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users
Tom Lowe
2003-Dec-04 22:26 UTC
[Asterisk-Users] Echo problem on conferencing....no analog interfaces
Now that actually brings up an interesting aspect. "My" echo canceller (the one at my end) would prevent the far end from hearing echo...so if I don't have a canceller at my end, they would hear echo! And, on a local call, there's really no need to have an echo canceller...so I guess that makes sense. It still doesn't explain why one of the other two callers (both accessing the conference exactly the same way) has echo and the other doesn't. I guess I just have to live with the fact that mixing VoIP calls and TDM calls on the same conference will simply have problems. I assume there are no other echo suppression settings that anyone can suggest. Tom Tom Lowe, President/CTO Compro Technologies, Inc. 512 South Main Street Forked River, NJ 08731 My Phone: +1-212-904-0788 Main Phone: +1-609-242-2211 Fax: +1-609-242-2212 Email: tom@comprotech.com Web: www.comprotech.com -----Original Message----- From: Steve Brown [mailto:sbrown@cortland.com] Sent: Thursday, December 04, 2003 7:43 AM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] Echo problem on conferencing....no analog interfaces There are probably echo suppressors on both ends of the LD circuit between NJ and CA, but none on the local NJ circuit. Steve Tom Lowe wrote:>Not a silly question. I've given that thought. > >To be honest, I'm not sure what kind of phone the California or NJ >callers were using. However, we've had numerous conferece calls using >many other services and have never had echo problems. > >The problem, in this case, more likely has something to do with the NJ >leg of the call (call 2), and possibly my leg (I was caller 1), since >the echo happened when it was just the two of us. If anything, the >"problem phone" would be my phone. This is a Lucent Partner phone >system and phone. Now, if it was MY phone causing the problem, then >both caller's 2 and 3 should be hearing their echo. But they weren't. > >I'm stumped. > > >For anyone who's trying to figure out how I'm doing an E1 PRI here in >the US, it's working like this: > >Verizon T1/PRI --> Cisco VCO/4K (Programmable switch) --> E1/PRI >--> MyAsterisk > >The other 2 calls are going like this: > >888 number --> SS7 --> VCO/4K --> T1/PRI --> Asterisk_1 --> IAX --> >MyAsterisk > >Tom > > > >Tom Lowe, President/CTO >Compro Technologies, Inc. >512 South Main Street >Forked River, NJ 08731 >My Phone: +1-212-904-0788 >Main Phone: +1-609-242-2211 >Fax: +1-609-242-2212 >Email: tom@comprotech.com >Web: www.comprotech.com > > > > >_______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users