Collaboration with VoIP Providers (discontinued platforms)

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

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.

HiPath 2000 / HiPath OpenOffice EE
SIP trunking features
 * up to 4 active SIP providers and one Internet connection
 * direct connection to DSL modem or operation behind another router using STUN
 * SIP trunking with single numbers (MSN) and up to 30 SIP user accounts
 * Direct Inward Dialing (DID)
 * most important features available
 * CLIP
 * Hold, Consultation, Toggle
 * Transfer (attended, semi-attended)
 * Ringing group, Call pickup
 * Conference
 * Call Forwarding
 * DTMF transmission e.g. for voicemail access
 * number of simultaneous VoIP connections is only limited by DSL bandwidth
 * automatic fallback to ISDN at SIP trunk failure
 * Voice Codecs G.711, G.729 and G.723
 * Fax over IP via T.38 (or G.711)


 * Up to 32 simultaneous calls (depending on the available bandwidth and used CODEC)

 Configuration 

HiPath OpenOffice EE V1 Configuration Guide for Internet Service Providers:

HiPath OpenOffice ME
SIP Trunking features
 * All features, requirements and restrictions listed in overview are valid.
 * For Call Forwarding to SIP provider announcements before connect are not audible).
 * FoIP (FAX over IP) with T.38 is available since the release of HiPath OpenOffice ME V1 R4 for FAX devices connected to Analog ports or Terminal Adapters. For FAX communication with OpenScape Office (OSO) a TDM Trunk has to be used.
 * The following T.38 FAX scenarios via ITSP are supported by HiPath OpenOffice ME:
 * 1. FAX devices (G.3) connected to an a/b (Analog) subscriber port of an HiPath GMSA, GMAA or GMAL Module or FAX devices (G.4) connected to a BRI/S0 (Digital) subscriber port of an HiPath GMSA or GMS Module.
 * 2. FAX devices (G.3) connected to an Analog port of an HiPath AP1120 Terminal Adapter (with SIP Loadware).
 * Currently not supported:
 * FAX services via ITSP from/to OpenScape Office client applications.

 Configuration 

HiPath OpenOffice ME V1 Configuration Guide for Internet Telephony:

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

Yes = has been successfully tested by development or customer

DID = accounts for PBX-trunking / Direct Inward Dialling

MSN = accounts for single number(s)

International
Please check provider home page for supported countries.