On 21/11/2008 6:47 a.m., Lincoln King-Cliby wrote: > Hi All, > > I have a ticket open with Digium, but based on their previous lack of support > for the Asterisk Appliance, I'm not really holding my breath - and, honestly, > I'm not 100% convinced it's a Digium issue in the first place (but I don't > know where else to point fingers). > > We have an AEX-804E (PCI Express, 4 FXO ports, Hardware Echo Cancellation) in > a Dell PowerEdge 1950 with four straight analog telephone lines, and running > asterisk 1.4.22. All of the local phones are Cisco 7961G with the SIP > firmware. Calls between SIP sets, across our SIP trunk on a VPN to a remote > office, or calls to or from the remote office's PSTN lines (over the > aforementioned SIP trunk) are all fine. > > On many [but not all] calls to or from the PSTN, I'm getting two complaints - > #1 is low receive (i.e. from the PSTN) volume > #2 (which seems to get significantly worse if I try tweaking bumping up the > tx/rx gain in Zapata.conf) is that if the person in our office is talking all > inbound audio is muted, but not the other way around (i.e. half duplex, but > not half duplex both directions if that makes any sense) > > Further compromising my sanity is that #1 seems hard for me to duplicate - > calls to or from my cell phone, for example, always sound fine. Local calls > are "mostly" fine, and long distance calls are hit-or-miss, calls to a > Hawaiian (how's that for "Long Distance" from Ohio) 1004 Hz test number are > fine - in fact, subjectively, borderline too loud which makes no sense since > before going live with Asterisk, we had a legacy Panasonic KSU/PBX on the > same lines - on the same punchdown blocks - and no one ever complained about > these issues. > > If I turn off the echo canceller there's a modest (may even just be > psychological) improvement in line gain, but the echo is so horrendous > (actually the echo sounds louder than the inbound call volume) as to make > things unusable. > > Any ideas? At all? I'm still relatively new to the > Asterisk-interconnected-to-PSTN side of things, and it seems like there are > dozens of config files and tools so explicit instructions are appreciated!
Try adding these to the modprobe line: vpmnlptype=4 vpmnlpmaxsupp=11 -- Kind Regards, Matt Riddell Director _______________________________________________ http://www.venturevoip.com (Great new VoIP end to end solution) http://www.venturevoip.com/news.php (Daily Asterisk News - html) http://www.venturevoip.com/newrssfeed.php (Daily Asterisk News - rss) _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
