[cisco-voip] cisco 8851 problematic

Thu Feb 9 15:12:07 EST 2017

Yes, the Cisco tac is saying the Ok, cancel message gets to the phone 
and doesn't reply.
Using the latest 11.7 firmware. CUCM v10.5.2 su3.

I've seen this before and it was caused by network issues where the other
phones didn't receive the Cancel.Theay are getting it.

How many phones have the shared line on it?  It could be that CUCM node is
getting overwhelmed.  12 phones and how can I tell if the Sub in overwhelmed.

Network path is clean.

Does the phone have a builtin Firewall?

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Today's Topics:

    1. cisco 8851 problematic (cisco.voip)
    2. Re: cisco 8851 problematic (Ben Amick)
    3. Re: cisco 8851 problematic (Brian Meade)
    4. Re: cisco 8851 problematic (Daniel Pagan)

----------------------------------------------------------------------

Message: 1
Date: Thu, 09 Feb 2017 02:52:23 -0500
From: "cisco.voip"<cisco.voip at verizon.net>
To:cisco-voip at puck.nether.net
Subject: [cisco-voip] cisco 8851 problematic
Message-ID:<815e0308-ece5-9f7d-1e98-ab322d27e058 at verizon.net>
Content-Type: text/plain; charset=utf-8; format=flowed

All, i'm on CucM 10.5.2 using cisco 8851 and 8861.
When several phones share the same number, when that line is picked up
by one of the phones - all the other phones continue ringing.
Anyone experience this, or have a tshoot method that works,

Thanks,
Ciscovoip

------------------------------

Message: 2
Date: Thu, 9 Feb 2017 14:58:29 +0000
From: Ben Amick<bamick at HumanArc.com>
To: cisco.voip<cisco.voip at verizon.net>,"cisco-voip at puck.nether.net"
	<cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] cisco 8851 problematic
Message-ID:
	<820C24BFE55F434C97807C60D4647ACE2FE984C9 at E2k10-MB-HT1.humanarc.com>
Content-Type: text/plain; charset="us-ascii"

Not saying it's the issue, but I know there was a few really messed up bugs with 10.5 with the firmware that was bundled in. This might be one of those bugs. I'd personally try updating your firmware for 88XX and see if it resolves the issue.

Ben Amick
Telecom Analyst

-----Original Message-----
From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of cisco.voip
Sent: Thursday, February 09, 2017 2:52 AM
To:cisco-voip at puck.nether.net
Subject: [cisco-voip] cisco 8851 problematic

All, i'm on CucM 10.5.2 using cisco 8851 and 8861.
When several phones share the same number, when that line is picked up by one of the phones - all the other phones continue ringing.
Anyone experience this, or have a tshoot method that works,

Thanks,
Ciscovoip

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Message: 3
Date: Thu, 9 Feb 2017 10:18:53 -0500
From: Brian Meade<bmeade90 at vt.edu>
To: "cisco.voip"<cisco.voip at verizon.net>
Cc:"cisco-voip at puck.nether.net"  <cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] cisco 8851 problematic
Message-ID:
	<CAGcuYh3s4S1YMoMR=gVqO9oKcEH-utjB506CtKn_skwG0GRsLg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

There's an issue where some phones don't ring-
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz56811

For your issue, I'd do some packet captures at CUCM and the phones
ideally.  CallManager traces/Console logs may be a good start if you can't
get captures.

I've seen this before and it was caused by network issues where the other
phones didn't receive the Cancel.

How many phones have the shared line on it?  It could be that CUCM node is
getting overwhelmed.

On Thu, Feb 9, 2017 at 2:52 AM, cisco.voip<cisco.voip at verizon.net>  wrote:

> All, i'm on CucM 10.5.2 using cisco 8851 and 8861.
> When several phones share the same number, when that line is picked up by
> one of the phones - all the other phones continue ringing.
> Anyone experience this, or have a tshoot method that works,
>
> Thanks,
> Ciscovoip
>
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
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Message: 4
Date: Thu, 9 Feb 2017 15:28:23 +0000
From: Daniel Pagan<dpagan at fidelus.com>
To: cisco.voip<cisco.voip at verizon.net>,"cisco-voip at puck.nether.net"
	<cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] cisco 8851 problematic
Message-ID:
	<0b0000c3fe034e0e94c4e0df0803a693 at NYC-EX2K13-MB.fidelus.com>
Content-Type: text/plain; charset="windows-1252"

I have heard of this but have yet to see it from a trace perspective. For troubleshooting, my first step would be to determine if the problem is CUCM or the IP Phones that don't stop ringing. The call is sent to an 8851/61 using INVITE, which means CUCM should force them to stop ringing on CANCEL.

>>> INVITE

<<< 100 Trying
<<< 180 Ringing
[[ Answered on other phone ]]

>>> CANCEL

<<< 200 OK CSeq Cancel
<<< 487 Request Terminated CSeq INVITE

>>> ACK

If this transaction occurs without issues, the problem is likely the IP phone and not CUCM, but digging in further would likely require review of console logs off the phone to determine if the CANCEL was received and handled properly. If this transaction does not occur, then further review into SDL signaling would be needed depending on where the transaction broke.

Basic way to find SIP signaling to an 88XX is searching CCM SDL traces for "TCP message to <ip_addr_of_phone> on port" or "TCP message from <ip_addr_of_phone> on port". Console logs would contain signaling info too and might be easier, but SDL of course is not written there.

Curious... what version of firmware are you running?

-----Original Message-----
From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of cisco.voip
Sent: Thursday, February 09, 2017 2:52 AM
To:cisco-voip at puck.nether.net
Subject: [cisco-voip] cisco 8851 problematic

All, i'm on CucM 10.5.2 using cisco 8851 and 8861.
When several phones share the same number, when that line is picked up by one of the phones - all the other phones continue ringing.
Anyone experience this, or have a tshoot method that works,

Thanks,
Ciscovoip

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