[AusNOG] New voice payload issues? Vocus QLD

Roger Lienert Roger.Lienert at vocus.com.au
Thu Jan 31 16:30:40 EST 2019

Hi All,

To close this thread, we found a couple of erroring E1's on our interconnect in Brisbane causing these voice quality issues, they were removed from service late yesterday afternoon which resolved the issue.

This fault was totally unrelated to last week's issue.


From: Roger Lienert
Sent: Wednesday, 30 January 2019 3:58 PM
To: 'Elliott Willink' <elliott at willink.net.au>; ausnog at lists.ausnog.net
Subject: RE: New voice payload issues? Vocus QLD

Hi Elliott,

We were able to reproduce the issue last week and then unable to reproduce once the issue was identified and resolved. For this reason, along with customer feedback, we are confident the original issue had been fixed. The fix was to replace a faulty module in a gateway device.

We are looking into this issue and have engaged our voice engineering team for further investigation, it is being treated as a real and serious issue.

The impact to your customer base is understood and we are working on identifying and resolving asap.


Roger Lienert | Manager Customer Assurance - Wholesale

M: +61 404 079 779   D: +61 2 8999 8226   E: Roger.Lienert at vocus.com.au<mailto:Roger.Lienert at vocus.com.au>
Support:: 1300 855 845 or +61 2 8117 5909  W: vocus.com.au<http://www.vocus.com.au/>
A: Level 12, 60 Miller Street, North Sydney, NSW 2060, Australia


From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Elliott Willink
Sent: Wednesday, 30 January 2019 3:00 PM
To: ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>
Subject: [AusNOG] New voice payload issues? Vocus QLD

Hi All,

After incident #20495093 (http://status.vocus.com.au/view-incident.aspx?IncidentID=475) was resolved last week we have had consistent reports from multiple customers of one way audio for inbound calls to QLD DIDs on Vocus CTS.

One way audio is always the same (inbound call, customer reports they can't hear calling party but calling party can hear the customer. Calling party calls back and the audio stream is fine). At a guess 5 to 10% of calls are impacted.

Vocus NOC initially blamed 'mobile networks not being reliable' as our example calls were not land-line, then packet loss in our network after we provided land-line examples. I captured a faulting call at an edge switch facing them and Vocus is sending us an empty RTP stream (payload entirely made up of 0x54 (g711.a idle?). The faulting calls behave the same from Vocus's Melbourne and Sydney SBC's and are isolated just to QLD in-dials so I'm somewhat convinced this is some sort of flow on effect of the incident last week.

In the interests of expediting a resolution has anyone else had similar issues? I've had a ticket open since Friday and Vocus are telling me nobody else has reported anything... It's slow progress.


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