[cisco-voip] Rings sound odd

[Erick Bergquist]

Another thing is it could be the characteristics of the analog line, and when the call hits the router the voice-port settings on router are being used. The first 1-2 rings you hear may be from telco before the call even hits the gateway/router. You can do a 'show voice call summary' repeatedly while placing the call to see if you see activity on the port in question during the first 2 rings. The first ring you hear on a analog line is meant to give the caller a warm-fuzzy feeling the call is going through. 

Maybe want to look at the cadance settings on the voice port, perhaps run a THL tone sweep to see what the best-match setting is for the lines and play with that to see what may work best.

http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a0080477a06.shtml


----- Original Message ----
From: Erick Bergquist <erickbe at yahoo.com>
To: Todd Franklin <toddnh65 at gmail.com>; cisco-voip at puck.nether.net
Sent: Friday, July 7, 2006 10:51:31 PM
Subject: Re: [cisco-voip] Rings sound odd

The first 2 rings or so are ring back before the gateway/router answers the call while router is waiting a ring or so for caller id info to be collected (from carrier/telco). After that call is passed through to CCM/CME/whatever and that may be modifying the progress indicators, tones, etc and thats why you hear a difference. I don't know the specific details on this part of the puzzle but I'm sure someone else will chime in. 

What does the call connect to, and how are the dial-peers and voice port configured?

----- Original Message ----
From: Todd Franklin <toddnh65 at gmail.com>
To: cisco-voip at puck.nether.net
Sent: Friday, July  7, 2006 7:15:54 AM
Subject: [cisco-voip] Rings sound odd

Hello.  2801 in H323 mode.  12 POTS lines plugging into FXOs.  Caller ID.

When I call one of the POTS lines, the first ring sounds fine.  The beginning of the 2nd ring sounds fine, but the 2nd half of the 2nd ring changes sound considerably.  Why is this?  (The 2nd half of the 2nd ring, and 3rd ring after that, sound much less "quality" than the first  1.5 rings.)  Do I need to change a setting somewhere??

Thanks!
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