Several of our local customers have recently subscribed to Verizon for their home phones. These customers could call our Nortel Option 11 before they switched to Verizon, but now their calls are rejected. The Verizon tech said that I have to allow 3.1 KHz audio for the calls to come through. Verizon is using a Siemen's switch, model unknown. Anyone have any experience with this?
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VERIZON AND NORTEL OPTION 11 COMPATIBILITY 4
- Thread starter ChickTek
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It sounds to me that you have an ISDN PRI with the channels setup for VOD instead of 3VCE. I believe 3VCE is what is needed for 3.1khz calls. My recollection is that 3VCE is the "new" method and VOD is the "old" method of setting up a PRI. I could have it backwards, but that might point you in the right direction at least. This is a setting for the TNs associated with the PRI loop.
Hope this helps
Rob
Hope this helps
Rob
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Going from 4 KHz to 3.1 KHz ?
Really? Well that's just dandy.
Forgive me if this is not the proper place for this rant,
but in a day and age where one should be striving to improve things I am now led to believe were actually going backwards?
Am I the only one that feels this way?
Cell phones are bad enough. Not only do they cut in and out, but the audio quality is crap. I read somewhere they only have 2KHz of bandwidth. But they're all like that so somehow it's "ok".
So what does the "Land Line" telecom world come up with to maintain it's technical superiority?
Reduced bandwidth.
And where does the extra bandwidth go?
My calculations are as follows:
4KHz x (8 bytes/sample) x (2 samples every second)= 64KBytes per call
24 calls x 64Kbytes = 1.5 MB in a T1
Now do it for 3.1 KHz
3.1KHz x 8 x 2 = 49.6 KBytes per call
24 calls x 49.6Kbytes = 1.2 MB
What are they doing with the extra .3 MB of bandwidth?
MP3 players and satellite radio annoy me just as well.
What good is it to put 300 songs into an iPod if they all sound like crap? (remember cassette tapes?)
This country is going down hill fast, and we're giving it away with a smile!
Thanks for listening. I feel a little better.
Back to work I go.
Really? Well that's just dandy.
Forgive me if this is not the proper place for this rant,
but in a day and age where one should be striving to improve things I am now led to believe were actually going backwards?
Am I the only one that feels this way?
Cell phones are bad enough. Not only do they cut in and out, but the audio quality is crap. I read somewhere they only have 2KHz of bandwidth. But they're all like that so somehow it's "ok".
So what does the "Land Line" telecom world come up with to maintain it's technical superiority?
Reduced bandwidth.
And where does the extra bandwidth go?
My calculations are as follows:
4KHz x (8 bytes/sample) x (2 samples every second)= 64KBytes per call
24 calls x 64Kbytes = 1.5 MB in a T1
Now do it for 3.1 KHz
3.1KHz x 8 x 2 = 49.6 KBytes per call
24 calls x 49.6Kbytes = 1.2 MB
What are they doing with the extra .3 MB of bandwidth?
MP3 players and satellite radio annoy me just as well.
What good is it to put 300 songs into an iPod if they all sound like crap? (remember cassette tapes?)
This country is going down hill fast, and we're giving it away with a smile!
Thanks for listening. I feel a little better.
Back to work I go.
I totally disagree that MP3 players sound like crap. It all depends on the quality of the player, but mostly on the bitrate the song was encoded at.
CD quality is around 44.1kHz @ 172kb/sec. I would say most MP3s are encoded at 128kbps to balance quality and disk space. However, some people download do endup being lower.
IT Admin (Meridian/PBX Newbie)
SaferTextiles Newark, NJ
Meridian Option11
Version 1411
Release 21
Issue 7+
CD quality is around 44.1kHz @ 172kb/sec. I would say most MP3s are encoded at 128kbps to balance quality and disk space. However, some people download do endup being lower.
IT Admin (Meridian/PBX Newbie)
SaferTextiles Newark, NJ
Meridian Option11
Version 1411
Release 21
Issue 7+
3.1 KHz audio ? strange request, but simmions techs often have trouble with english.. if you use ip trunks or qsig back to a simmions you can make it work.. as far as mp3 i use a thumb drive direct to my cd player in the truck.. it sounds as good if not better then the store bought cd's.. and it holds way more music.. an ipod sounds like crap, msotly because it is.. but the mp3 format is not the cause.. i only have 300 watts in the truck and 7 speakers, came that way and i upgraded the head unit...
pri is 23 barrier channels at 64 with no overhead, using 64k outband on the d,,, 1.54 meg..north american standard.. t1 was 24 channels 64K with a 8k inband overhead.. since the overhead was mostly setup and tear down, major loss of bandwidth..
verison is decent service, you don't have phones when the power goes down, your 911 ani does not always work and if your shared bandwidth get's to close to cir, your voice sounds like mickey mouse on drugs.. voip is here to stay and it will get better.. if stable telephone service is not that important, jump on it.. i would recogmend to my customers, use it if you want to save the money, but have enough tdm to stay in business when it drops..
the networks down is way more common then the phones are down.. but the networks down is usually not true.. usually a server or two is reboting or a swtich is unplugged in a closet.. the backbone is seldom "down".. if your data geeks can keep your totat network up for a year or two.. get rid of your tdm, they are ready to play in the bigs... try to get any pc/server problem done without a re-image...
call any pc tech support and try to get something done WITHOUT a reboot... then try and get permission to reboot a nortel 81
john poole
bellsouth business
columbia,sc
pri is 23 barrier channels at 64 with no overhead, using 64k outband on the d,,, 1.54 meg..north american standard.. t1 was 24 channels 64K with a 8k inband overhead.. since the overhead was mostly setup and tear down, major loss of bandwidth..
verison is decent service, you don't have phones when the power goes down, your 911 ani does not always work and if your shared bandwidth get's to close to cir, your voice sounds like mickey mouse on drugs.. voip is here to stay and it will get better.. if stable telephone service is not that important, jump on it.. i would recogmend to my customers, use it if you want to save the money, but have enough tdm to stay in business when it drops..
the networks down is way more common then the phones are down.. but the networks down is usually not true.. usually a server or two is reboting or a swtich is unplugged in a closet.. the backbone is seldom "down".. if your data geeks can keep your totat network up for a year or two.. get rid of your tdm, they are ready to play in the bigs... try to get any pc/server problem done without a re-image...
call any pc tech support and try to get something done WITHOUT a reboot... then try and get permission to reboot a nortel 81
john poole
bellsouth business
columbia,sc
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