07-10-2009 02:47 PM - edited 03-21-2019 01:17 AM
I am noticing something weird, when I have our business line connected to the UC520 and make a call from an external land line, the exteral call rings twice before the first ring by an ip-phone connected to the UC520. If I plug our business line directly into an old analog phone (not using the UC520) and make the same call from an external line, the first ring is almost instant.
Why is there a 2 ring delay when using the UC520, is this normal?
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07-10-2009 02:50 PM
This is normal. It takes a ring cycle for the FXO to detect activity and receive caller id (depending on the caller ID type). You can lower this by doing this command:
UC500(config)#voice-port 0/1/0
UC500(config-voiceport)#ring number ?
<1-10> The number of rings detected before closing loop
Remember to do a "shutdown", followed by a "no shutdown" after changes made to your voice ports.
Thanks,
Marcos
07-10-2009 03:05 PM
You need to keep an eye on caller ID showing up on the IP phone. Give it a shot. You can always go back.
Marcos
07-10-2009 08:58 PM
Hi Tervor,
Keep in mind that some carriers may not send the CID untill the second ring, i know that here in Australia most carriers pass it through on the second ring, ocassionaly it may come through on the first ring, but that is rare.
You can do a Debug VPM signal (For PSTN) and or debug ISDN to see when the CID is being passed, this will give you a good indication on how much you can decrease the Ring in timer.
Cheers,
David.
07-10-2009 02:50 PM
This is normal. It takes a ring cycle for the FXO to detect activity and receive caller id (depending on the caller ID type). You can lower this by doing this command:
UC500(config)#voice-port 0/1/0
UC500(config-voiceport)#ring number ?
<1-10> The number of rings detected before closing loop
Remember to do a "shutdown", followed by a "no shutdown" after changes made to your voice ports.
Thanks,
Marcos
07-10-2009 03:04 PM
thanks for the reply. Is there any disadvantage to doing this?
07-10-2009 03:05 PM
You need to keep an eye on caller ID showing up on the IP phone. Give it a shot. You can always go back.
Marcos
07-10-2009 03:08 PM
ok I will play around with it. Our caller ID is't setup on our new lines until monday so i'll have to wait.
07-10-2009 08:58 PM
Hi Tervor,
Keep in mind that some carriers may not send the CID untill the second ring, i know that here in Australia most carriers pass it through on the second ring, ocassionaly it may come through on the first ring, but that is rare.
You can do a Debug VPM signal (For PSTN) and or debug ISDN to see when the CID is being passed, this will give you a good indication on how much you can decrease the Ring in timer.
Cheers,
David.
07-15-2009 11:17 AM
I typed the following in the CLI with no errors, but when I search the output of "show running-config" I can't find "ring number" anywhere, so i don't think it applied?
UC500#enable
UC500#conf t
UC500(config)#voice-port 0/1/0
UC500(config-voiceport)#ring number 1
UC500(config-voiceport)#shutdown
UC500(config-voiceport)#no shutdown
UC500(config-voiceport)#exit
UC500(config)#exit
UC500#wr mem
is that the correct way I should make changes?
I also hearch this from my Telco: "On the TELUS network, the Name and number are delivered immediately following the first full ring."
It seems the CallerID on my line still isn`t going to be setup until tommorow, so I can`t fully test when the CID is actually passed.
07-15-2009 11:19 AM
This is the correct way. Let us know how it goes.
Marcos
07-15-2009 11:46 AM
You can try to do "connection plar XXX immediate" and see what happens. XXX is the destination number (internal). Again, a "shut", "no shut" would be required.
Marcos
07-15-2009 11:46 AM
Yes that setting definatly worked, the Cisco ip-phone rings much faster now, right after the first ring on the external end. I will see tommorow how it effects the CallerID, thanks so much for the help with this!
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