SIP is the backbone of modern, IP-based communication –
ideal for companies that rely on flexible and future-proof communication.
XPhone can be connected via SIP to numerous telephone systems & Session Border Controllers (SBC). XPhone ensures that the various SIP-capable endpoints communicate optimally with each other.
Your benefit? A homogeneous, cross-location ICT infrastructure.
SIP stands for "Session Initiation Protocol". This real-time communication protocol is used everywhere in the telephony world to establish and terminate sessions and/or connections between two or more parties.
The XPhone Connect Server can also be connected to your telephone system or a session border controller via SIP to enable telephony and
(web) meetings.
XPhone uses the so-called XPhone Call Controller, XCC for short, to translate between clients and telephone systems or SBCs.
SIP offers several key advantages for corporate communication:
- Standardised communication: SIP is an open standard and enables interoperability between different devices and systems.
- Future-proof: SIP is the basis for modern IP telephony and unified communications – ideal for cloud and VoIP architectures.
- Cost savings: SIP trunks replace traditional ISDN lines and reduce connection and infrastructure costs.
- Scalability: new phone numbers or voice channels can be added quickly and easily.
- Integration: SIP enables seamless integration into UC platforms such as XPhone Connect, including softphones and mobile clients.
- Location independence: SIP connections work over the internet, regardless of the physical location of the user.
We use SIP for this
SOFTPHONE
MOBILE APP
ANYDEVICE
FEDERATION
(WEB-) MEETING
How SIP works
What is SIP?
SIP (Session Initiation Protocol) is a communication protocol for controlling voice, video and messaging sessions over IP networks. It is primarily used for VoIP (Voice over IP).
What is SIP used for?
SIP is used to set up, control and end communication sessions – for example telephone calls or instant messaging via the internet.
What advantages does SIP offer companies?
- Cost savings due to elimination of classic telephone lines
- Flexible scaling of voice channels
- Cross-location communication
- Integration into modern UC solutions such as XPhone Connect
Is SIP secure?
Yes, SIP communication can be reliably secured with encryption methods such as TLS (Transport Layer Security) and SRTP (Secure Real-Time Transport Protocol).
Can SIP be used in the cloud?
Yes, SIP is ideal for cloud-based telephony and UC solutions. Many companies operate SIP trunks and SIP-enabled systems in Azure, AWS or their own IaaS environments.
What is the difference between SIP and VoIP?
VoIP describes the transmission of voice over IP. SIP is a protocol that initiates and controls VoIP sessions. SIP is therefore a technical component of VoIP.
Is SIP compatible with my existing telephone system?
Many modern telecommunications systems support SIP directly. Older systems can be connected via gateways or session border controllers (SBC).
How exactly does SIP work in conjunction with XPhone?
The user calls a number via the XPhone Client. This signal is forwarded from the XPhone Server to the XPhone Call Controller (XCC). The XCC then sends the corresponding SIP event, a so-called SIP invite, to its remote station. If this SIP invite is answered by the remote station, the XCC receives an OK event in return. The media is then negotiated and the user can send and receive voice in no time at all.
What added value does XPhone provide in the SIP context?
Although it is defined in many RFCs (Request for Comments), SIP is not implemented or interpreted in the same way everywhere. This means that unwanted behaviour can occur between two SIP-capable endpoints despite standardisation.
XPhone Connect takes these peculiarities into account: you can use SIP telephony on all our approved telephone systems and SBCs without any complex special configuration.