SIP Provider VodafoneZiggo (NL) (kb4611)

The information in this article applies to:

  • SwyxWare 11
  • SwyxWare 2015
  • SwyxWare 2013

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Information und configuration hints for SIP provider VodafoneZiggo (Netherlands).


General information

VodafoneZiggo (NL) is offering a registerless SIP trunk. This means that the authentication is based on the public IP address of the SwyxWare server. Therefore, you need a static, public IP address from your ISP assigned to the SwyxWare server.

The actual interoperability tests were performed by VodafoneZiggo, not by the Swyx TPP.


VodafoneZiggo (NL) is offering SIP trunks for two different services. While Vodafone One Fix (VOF) provides access to the usual public telephone net (PSTN), Corporate Net over IP (CNoIP) is offereing access to the mobile telephone network and to so called closed user groups. A customer does not necessarily need both services.
If a customer is using both services, two SIP trunkgroups with the corresponding profile and a respective SIP trunk must be created within the SwyWare. The preconfigured IP address for the proxy server should be checked and modified if necessary. For the CNoIP trunkgroup, two routing records must be cerated:

  1. For calls into the mobile network: Destination +316* with a priority of 600
  2. For calls into the Closed Mobile User group. Destination i.e. 7* with a priority of 600 if the user groups covers the number range from 7000 to 7999.

For both trunkgroups, the Calling Right should be set to 'Internal Destinations'.

For the VOF trunk, only G711A and G.729 should be selected as audio codecs; for the CNoIP trunk G711A only.


VodafoneZiggo (NL) expects a Session interval of 1800 (seconds) on outbound calls. The prevent reINVITES which would slow down the call establishment, underneath the registry key  HKLM\Software\Wow6432Node\Swyx\LinkMgr\CurrentVersion\Options two new DWORD values SipMinSessionTimerIntervalSeconds and SipSessionTimerIntervalSeconds  can be created with an assigned value of 1800 (decimal). After creating this value, the LinkMgr service must be restarted.
Important: This setting will affect all SIP Trunks.

For your convenience the generated CustomProviderProfiles.config is available for download at the end of this article. Extended information about how to use this file can be found at Configuration and Adaptation of SIP Providers via Provider Profiles (kb3436).
Important: From SwyxWare2013 R5 on, both provider profiles for VodafoneZiggo (NL) are available in the list of provider profiles and the CustomProviderProfiles.config is no longer necessary.
Important: Until SwyxWare the profiles are named Vodafone VOV (NL) and Vodafone CNoIP (NL).

Tested Features

  • Incoming/outgoing national calls
  • Incoming/outgoing international calls
  • Correct Calling Line Identification (CLI) on national and international calls
  • CLIP No Screening
  • Holding and retrieving calls
  • Toggeling between two calls
  • Call transfer
  • Conferencing
  • Mutually supported codecs:
    • G.711a
    • G.729 (VOF only)
    • T.38
  • Incoming/outgoing DTMF signaling in accordance with RFC2833
  • FAX transmission via T.38


Test date: 
04/06/2014 with SwyxWare 2013 R4
09/06/2015 with SwyxWare 2015 R2
07/03/2018 with SwyxWare

Overview of tested SIP provider


As far as software supplied or used by us, includes open source elements the additional terms under apply in addition. An overview which products from the Swyx portfolio include open source elements and which open source license is relevant can be found under

The third-party contact information included in this article is provided to help you find the technical support you need. This contact information is subject to change without notice. Swyx in no way guarantees the accuracy of this third-party contact information nor is responsible for it's content.


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