[cisco-voip] no audio for 10 seconds
Wellnitz, Erick A.
erick.wellnitz at kattenlaw.com
Wed Nov 2 16:05:24 EDT 2011
The following looks to be what I'd be looking for to indicate this 'delay' if I'm not mistaken.
origdevicename duration orignumberpacketsreceived datetimeconnect datetimedisconnect destnumberpacketssent datetimeorigination
=============== ======== ========================= =============== ================== ===================== ===================
SEPB8621F6D6648 34 168 1315258847 1315258881 NULL 1315258830
Connect and disconnect add up to the duration of 34 but there is a difference of 17 between origination and connection.
From: Wes Sisk [mailto:wsisk at cisco.com]
Sent: Wednesday, November 02, 2011 1:25 PM
To: Wellnitz, Erick A.
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] no audio for 10 seconds
good observation on the PVDM3's it could be an IOS DSP problem. Do phones from other locations call through that gateway?
how about this:
# find 9971 model
admin:run sql select first 10 * from typemodel where name like '%9971%'
enum name tkclass moniker showindevicedefaults defaultdtmfcapability tkrisclass tksubclass
==== ========== ======= ================ ==================== ===================== ========== ==========
493 Cisco 9971 1 MODEL_Cisco_9971 t 10 1 1
# find 10x 9971 phones
admin:run sql select first 10 pkid,name,description from device where tkmodel=493
pkid name description
==================================== =============== ===========
bfc01793-c71a-4207-ba41-ef7c81d966d7 SEP44E4D9449BB4 Auto 86102
# find CDR's based on devicename from last query
admin:run sql car select origdevicename,duration,orignumberpacketsreceived,datetimeconnect,datetimedisconnect,destnumberpacketssent,datetimeorigination from tbl_billing_data where origdevicename in ("SEP44E4D9449BB4","SEP44E4D9449BB5")
origdevicename duration orignumberpacketsreceived datetimeconnect datetimedisconnect destnumberpacketssent datetimeorigination
============== ======== ========================= =============== ================== ===================== ===================
import the final output into excel. compare packetssent and packetsreceived. compare packet counts to duration. compare duration to datetimedisconnect-datetimeconnect.
/wes
On Nov 2, 2011, at 12:25 PM, Wellnitz, Erick A. wrote:
Only reported on the 9971. No consistency to the issue.
We've tried a selective firmware update to 9-2-2 without success.
We have checked for possible delays in call setup with MGCP, Q.931 and SIP with no clues or even momentary delays in the setup.
We have exhausted tweak options for the QSIG integration (timers, etc.)
We have attempted to recreate the issue without success even with a phone known to experience the issue.
Unfortunately we don't have the tools available to determine if we're experiencing troubles with the RTP stream initialization, especially seeing as the issue is intermittent.
The one thing which stands out to me is that we have two other locations with the 9971 and they are not experiencing these issues. Only difference here is the PBX integration with QSIG. This site is also the only one with PVDM3.
To: Wellnitz, Erick A.
Cc: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] no audio for 10 seconds
Hi Erick,
Based on history you're a pretty enterprising. Any insight on what you've checked so far?
Is it only reported on 9971's? Is there any other consistency in the reports thus far?
One of my favorite approaches to get a bit of insight on this type of issue is CMR data. Look at CMR's for "simple" calls - direct call, connection, duration hangup; no mute/transfer/hold/park/etc. If you're using fixed packet rate audio codec (not ilbc) then the packets sent/received should be linearly proportional to call duration barring a few special situations.
Assuming 20packets per second are the number of packets received appropriate for the duration of the call?
If the packet counts are correct then it's an audio cut through issue on the gateway or audio rendering issue inside the phone.
gateway concerns: call going into connected state, any progress indicators exchanged (affect audio cut through timing)
If the packet counts are off then there is a network issue.
/wes
On Nov 2, 2011, at 11:46 AM, Wellnitz, Erick A. wrote:
All, especially you really smart guys at Cisco...
We're at a loss for where to continue looking for a potential cause on a very intermittent issue.
Mixed 9971 and 7975 environment with shared lines. Inbound calls come into our old (and temporary) Siemens PBX. Cross a QSIG trunk group to Cisco 3945 with PVDM3-192
Caller on our Cisco side places a call. They hear ringback. Call connects without audio for about 10 seconds.
We couldn't find anything similar to this in bug toolkit.
9971 firmware: 9-2-1
CUCM Ver: 8.0.3.21900
SR 619601919
We have a laundry list of issues with the 9971 model but this is currently the most urgent.
ERICK A. WELLNITZ
Network Engineer
Katten Muchin Rosenman LLP
525 W. Monroe Street / Chicago, IL 60661-3693
p / (312) 577-8041
erick.wellnitz at kattenlaw.com<mailto:erick.wellnitz at kattenlaw.com> / www.kattenlaw.com<http://www.kattenlaw.com/>
===========================================================
CIRCULAR 230 DISCLOSURE: Pursuant to Regulations Governing Practice Before the Internal Revenue
Service, any tax advice contained herein is not intended or written to be used and cannot be used
by a taxpayer for the purpose of avoiding tax penalties that may be imposed on the taxpayer.
===========================================================
CONFIDENTIALITY NOTICE:
This electronic mail message and any attached files contain information intended for the exclusive
use of the individual or entity to whom it is addressed and may contain information that is
proprietary, privileged, confidential and/or exempt from disclosure under applicable law. If you
are not the intended recipient, you are hereby notified that any viewing, copying, disclosure or
distribution of this information may be subject to legal restriction or sanction. Please notify
the sender, by electronic mail or telephone, of any unintended recipients and delete the original
message without making any copies.
===========================================================
NOTIFICATION: Katten Muchin Rosenman LLP is an Illinois limited liability partnership that has
elected to be governed by the Illinois Uniform Partnership Act (1997).
===========================================================
_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
https://puck.nether.net/mailman/listinfo/cisco-voip
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20111102/584a61ae/attachment.html>
More information about the cisco-voip
mailing list