Collaboration with VoIP Providers (discontinued platforms)

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Collaboration with VoIP Providers via SIP Trunking is an important topic in the todays world of Voice/Data Communication over the Internet. The following information will give an overview of the supported VoIP providers in the different countries for discontinued platforms. For actual platforms see Collaboration with VoIP Providers

1 General Information by platform
- 1.1 HiPath BizIP
2 Tested VoIP providers by countries

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General Information by platform

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HiPath BizIP

SIP trunking features

One active SIP provider
Up to 10 SIP user accounts
SIP trunking with single numbers or Direct Inward Dialling
Up to 8 simultaneous VoIP connections, depending on DSL bandwidth
Parallel ISDN and VoIP connections
Fax via ISDN or SIP terminal adapter for Fax T.38

General requirements

HiPath BizIP should be connected directly to the xDSL modem through WAN interface. In special cases operation behind existing routers is possible. To solve problems with network address translation between private and public IP adresses the following scenarios are supported
- BizIP AD 20 with integrated SIP-aware Firewall connected directly to modem
- STUN protocol enabled when BizIP is operated behind 3rd party router
- Session boarder controller solves problem at Provider Network
To use the built-in voice mail, the provider must support G.729 voice compression. At test time e.g. AdvanceCall, PepPhone, Purtel and SimplyConnect did not support G.729.
For remote access to the answering machine, the provider must support outband tone dialing transmission (DTMF) in accordance with RFC 2833.

SIP Provider dependent restrictions

Special call numbers and emergency calls are not supported by all providers. Emergency calls are routed automatically through ISDN by HiPath BizIP. Special call numbers can be defined to be routed through ISDN by Web based Management.
Calling line identification: The CLIP and CLIR features are implemented differently by the various providers. Limitations in the calling line identification may occur. For some providers CLIP/CLIR has to be configured in the Providers' Web Portal.
Some Providers do not support streaming of Musik on Hold (MOH) to a device in call hold (e.g. sipgate).
Call Forwarding external - external is currently not possible with some providers because they do not support direct payload (e.g. T-Online, QSC, VoiceFlex).

For minor limitations or configuration details please see also the release note at ftp://bizip.siemens.com/HiPath_BizIP1.0.

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Tested VoIP providers by countries

The main SIP trunking functions of the HiPath platforms have been tested with the following Internet telephony providers.

d = default setting available from drop-down box in the WBM of HiPath BizIP
= has been successfully tested by development or customer
DID = accounts for PBX-trunking / Direct Inward Dialling
MSN = accounts for single number(s)

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Denmark

VoIP Providers	Type	HiPath BizIP
Viptel	MSN

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France

VoIP Providers	Type	HiPath BizIP
Plug & Tel

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Germany

VoIP Providers	Type	HiPath BizIP
1&1	MSN	d
AdvanceCall
Arcor	DID	d
bellshare
carpo
dus.net	MSN DID	d
freenet	MSN	d
freenetBusiness	DID	d
GMX	MSN	d
nikotel	MSN	d
PBX-network	MSN	d
PepPhone
Purtel	MSN	d
QSC	DID	d
SimplyConnect
sipgate	MSN DID	d
sipNetworks.de
STRATO	MSN	d
T-Online	MSN	d
toplink	MSN DID	d
Vortel	MSN	d
XSip	DID	d