Author: Marc

Changes to the TANGO Blue product

TANGO Blue is TANGO’s counterpart of the EPT LuxFibre. From the start TANGO Blue users received a public IP (compare “No public IP for EPT LuxFibre“). TANGO Blue users weren’t affected by the issues present with LuxFibre. For a while TANGO is now offering an IPTV service on the TANGO Blue access. This combination however provides the user with only a private IP, giving the TANGO Blue+IPTV users the same disadvantages. Several user reports seem to point to TANGO’s CGN, which seems to have difficulties to provide a stable bandwitdh, in some cases reports indicate a reduction of bandwitdh by ~50%. In case you have issues with your TANGO Blue product you should contact the TANGO helpdesk a.s.a.p.

LuxFibre disables alternative VoIP services?

UPDATE: Recent Fritz!Box OS allow to choose between Internet or Voice VLAN when configuring VoIP accounts. See AVM provides workaround to use 3rd party ITSPs. The statements below are obsolete.

Yes it does, unfortunately.

So why exactly? The short answer is, because the VoIP part of the Fritz!Box is moved to an isolated virtual LAN (VLAN) with no Internet access, so the Fritz!Box VoIP part cannot reach any alternative VoIP services as these are somewhere on the Internet.

But why is this necessary? The LuxFibre product is designed to provide all services over IP. This includes any telephone services (analogue, ISDN) which were previously delivered directly via copper. Telephony over IP cannot Continue reading “LuxFibre disables alternative VoIP services?”

Which LuxFiber variant is best for me?

The FTTH/VDSL service is now available for half a year, but it is still difficult to get complete and correct information about the real setup costs and the eventual down sides of a FTTH connection.

I have been following several LuxFiber related threads on different Social Networks (Facebook, Twitter, Google+ etc) and people seem frustrated by the level of information they can get from the ISP’s sales helpdesk personnel.

Can I have FTTH (fibre) or VDSL (copper)?

Continue reading “Which LuxFiber variant is best for me?”

FTTH Modems delivered by EPT are faulty

I have received the following fault explanation, originally written by an EPT engineer. The text seems to indicate that the current fiber equipment delivered and installed by EPT has issues to transport packets of a certain size. In the case of the user who forwarded this message, the fault was most apparent during VoIP calls using the G.711 codec.

Le problème était lié à un protocole de correction d’erreurs au niveau upstream sur l’équipement de terminaison de la fibre. Il semble qu’il y ait un bug au niveau de cet fonctionnalité qui fait que les paquets d’une taille de 200-201 bytes ne sont pas transmis correctement
(i.e. 80% de perte).
Malheureusement le protocole voip G711 que vous avez utilisé génère exactement cette taille de packets et était donc fortement impacté alors que les autres flux de trafic et les différents tests ne montraient pas d’erreurs.
Suite à l’intervention de notre technicien sur place on a cependant pu cerner le problème et on a donc désactivé la fonctionnalité fautive sur votre accès en attendant un bug-fix de la part du fournisseur de
l’équipement.

 

So in case you are currently using the LuxFibre product and you have quality issues with VoIP applications, you might be affected by this bug. The workaround implies the intervention of an EPT technician.

I’m Being Attacked by PRISONER.IANA.ORG! aka RFC 6305

In 2009 I wrote about draft-ietf-dnsop-as112-under-attack-help-help-02. In 2011 the IETF released this document as RFC 6305.

As an operator of currently one AS112 ANYCAST Node and several NTP POOL servers I know how true and necessary this RFC really is.