Does anybody know?
Is there a known issue with centro grande dsl router and PPTP VPN over swisscom net? We have several customers that can’t establish a connection any more - since about 2 or 3 weeks.
Thanks for some help
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Arnold Nipper / nIPper consulting, Sandhausen, Germany
email: arnold(a)nipper.de phone: +49 6224 5593407 2
mobile: +49 172 2650958 fax: +49 6224 5593407 9
Here's a short follow-up to yesterday's presentation of Zebbra guys.
What Markus and Roland have presented, is an approach to monitoring
the quality inside the box (CUCM in their case). But there are
actually ways to monitor the quality outside of the box, and they have
been around for a while.
For example, I've seen a demonstration of Malden MultiDSLA tool over
10 years ago. At that time they only had the analog interface that
emulated a handset, and two Malden boxes were sending an audio sample
to each other and assessing the quality of received audio. The tool is
quite expensive though.
There are currently several commercial solutions for audio quality analysis:
POLQA (expensive), recommended by ITU-T: it compares two audio files
and produces the quality assessment score.
Sevana AQuA (less expensive): it also compares two audio files and
produces several quality metrics. I compared it with PESQ (predecessor
of POLQA), and AQuA works significantly faster. It was very helpful in
detecting lost RTP packets in the tests where I could not place a
packet sniffer wherever I wanted.
There are also various approaches to passive quality analysis, and
some are documented in ITU-T P.563 and G.107. Sevana is also offering
its PVQA tool that tries to detect packet loss and audio distortions
by analyzing the input audio.
I could not find any open-source tools which would help in quality
analysis at the audio level. But there's plain old tshark which
produces the loss and jitter statistics for RTP streams, and it's
pretty efficient if you are able to capture the traffic at the
receiving end. Also VoIP monitor provides the ability of G.107
analysis on captured data packets.
Here's my detailed article on using Sevana AQuA:
And here's my demo lab, and you have a possibility to send an audio
recording for Sevana PVQA analysis:
Senior Consultant, CCIE #5478
+41 79 407 0224
I recently bought a Mikrotik CR1009-8G-1S-1S+. I added a Mikrotik S
-31DLC20D SFP module to connect my internet uplink.
The uplink provider confirmed that the uplink should be working with
wavelength 1310 nm, single mode, 1GBit, no auto negotiation.
Unfortunately the webinterface shows "no link". Firmware is 6.33 and I
rebooted the device - still no link.
Please note that I do NOT get a value for sfp-rx-power in the
webinterface or the following dump. Is that a hint that the fiber is
not OK or is that conclusion invalid?
/interface ethernet monitor 9
This is my last, regulary organized Beer Event :-/
But good news: Emanuel & Aarno will take over the organization of the 2016+ events ,-)
For my "last" event I've organized 20 places for Fondue/racelette.
The menu will be fixed:
Entry: Assiette Valaisanne
Main Course: Fondue or Racelette
Dessert: Sorbet of apricot
Please indicate what you prefer (Fondue/Racelette).
Be aware: 20 seats are fix reserved. First come first served.
Details for the next event:
Event: SwiNOG-BE150 - Beer Event 150
When? Monday, 14th December 2015 18:30
Where? Walliser Keller
Zähringerstrasse 24, 8001 Zürich
(GoogleMaps Link: http://goo.gl/maps/kx3ad)
Places avaiable? 20!
!! Please sign up if you're really coming - because the seats are limited! !!
Start: Wednesday, 11th November 2015 - 12:00
Stop: Wednesday, 9th December 2015 - 12:00
Since we have to make reservations, I need to know who's coming and who not.
If you can't attend and you're registered please inform me ASAP (+41 79 277 92 35).
We are looking for a tool that permits to check the behavior of a telephony system at the level of the end user.
The idea is to launch telephone calls at regular intervals one system, to pass through the public network and to check on the PABX system under test (Siemens HiPath 4000 with Trade-Boards) that the voice call arrives (signaling path) and can be established (voice path).
Our problem today is that we can check plenty of internal interfaces and links, but we do not known if all the higher level protocols behave well.
Thanks for your ideas !
Etat de Neuchâtel
Dear Participants and Speakers
Please find general information about the SwiNOG #29 meeting below.
Date: 05.11.2015 - Registration 08h15 - 09h15
Location: Gurtenpark, Bern. NEW Location: it's now closer to the station.
Follow the signs.
>From Bern main station you may take:
- S-Bahn S3 Belp and exit at Wabern station
- Tram 9 (Wabern) and exit at Gurtenbahn stop
==> Then take the Gurtenbahn to the Gurtenpark. You DO NOT have to pay a
fee, just tell you attend to the SwiNOG event. Don't throw away the ticket -
you'll need it to get down.
Map (Ground Station of the cable rail): https://goo.gl/maps/5uSKtgbianM2
Suggested trains from
During the meeting you have access to free WLAN!
- SSID: MOBILE
- Credentials will be printed on your badge
- YOU are responsible for the security of your data, this WLAN is not
Many thanks to our sponsors!
Juniper, Brocade, Cisco
See you at SwiNOG #29!
Do any other also got troubles in messaging @bluewin.ch customers?
Nov 2 14:32:54 postfix/smtp: <XXXX>: to=<XXXXX(a)bluewin.ch>,
delays=0/0/0.03/0.03, dsn=5.5.0, status=bounced (Protocol error: host
mxbw.lb.bluewin.ch[188.8.131.52] said: 250 2.0.0 RCPT TO accepted (in
reply to DATA command))