03 / 2010 Voice over IP / LANCOM product range ... connecting your business Just what is Voice over IP? Voice over IP (VoIP) stands for the complete integration of telephony into the IP network. Voice data is transported in the form of IP packets, meaning that it can be transmitted via the com- puter network into the Internet and received by a caller. Specialized VoIP telephones convert your voice into data packets. This conversion can be also carried out for existing analog or solutions ISDN telephones by a VoIP router. Apart from that, it is also possible to combine your conven- tional PBX (private branch exchange) system with VoIP. This means that you can continue to use your old PBX system, and yet you can upgrade your telephone network with Voice over IP. As well as being operated internally, VoIP can transmit voice data to external telephone over IP Voice subscribers, for example by means of a DSL connection and a SIP provider ("Internet telephony"). Alternatively, VPN connections can be established between the company's own sites for secure data and telephone connections ("Voice over VPN") for VoIP services without requiring a SIP provider. If you operate an analog or ISDN exchange line and you wish to retain the associ- ated telephone numbers, you can use suitable VoIP routers to conduct calls to regular landline subscribers. FAX SIP- Internet Provider Analoges DECT Telefonnetz ISDN / LANCOM – Come with us into the new age of telephony ISDN SIP Analog- Telefone Teilnehmer The future is the unification of telephony and data networks. For years already LANCOM has been developing voice transmission in IP networks – with success. The persuasive quality of service has made LANCOM routers a component of the T-Octopus VoIP PBX systems from Deutsche Telekom Why integrate SIP into routers? for many years now. That's proof of the high quality of LANCOM solutions. The Session Initiation Protocol (abbreviated as SIP) is the standard protocol used in unified commu- nications. Apart from controlling VoIP telephone calls, it is also used for real-time connections such as audio and video transmissions, chat and presence information. Real-time connections such as for Voice over IP demand a large number of dynamically managed ports. This often causes problems when LANCOM – Quality Made in Germany setting up connections between internal networks with their private IP addresses and the Internet Our products are designed to meet the specific needs of the European markets and are engineered with its public IP addresses (a procedure called masking). To ensure that telephone calls between in Germany. The operating system LCOS (LANCOM Operating System) is developed in-house and IP networks remain reliable and secure, the router must be able to recognize real-time data. The undergoes constant improvement. This gives our customers the assurance that specialized require- firewall integrated into the LANCOM router only allows data to be transferred to approved connec- ments and upgrades can be integrated rapidly and reliably. Even customers with older devices con- tions. Data packets are received by the router's media proxy, they are validated, and their content tinue to benefit from regular free software updates – which demonstrates just how hard we work only is passed on. The destination subscriber is then sent a new data packet, so assuring that con- to protect our customers' investments, and how much we value the security of their networks. nection security is maximized. In addition to that, the router automatically adapts its bandwidth control and Quality of Service to meet the SIP connection requirements. In brief, the integration of SIP and the Media-Proxy into our routers forms the basis for functional unified communications. 2 3 Local VoIP networking in offices Secure IP telephony LANCOM business VoIP routers offer a maximum integration density Voice over IP with LANCOM is secure The best way to conduct secure IP telephone calls between company sites is via data VPNs – a model that LANCOM has implemented for years already. This gives you site connectivity and IP telephony from a single source and in one device. Our routers contain all of the functions that you need. Secure site connectivity through IPsec-based VPN LANCOM VoIP routers are VPN capable. That means that your telephone conversations are routed via a tunneled connection. You can rest assured that your confidential busi- ness conversations cannot be intercepted by outsiders. Security from the firewall and media proxy All LANCOM devices are equipped with an object-oriented firewall and an intrusion detection system. This means that unauthorized persons have no access to your network or to your IP telephony components. LANCOM business VoIP routers offer numerous possibilities for connection: PCs, SIP The media proxy also provides a high-security environment for local networks. Incom- phones, analog DECT telephones, fax, answering machines, printers and other ISDN ing and outgoing voice-data packets terminate at the proxy, which then allocates these equipment can be connected directly to the router. Among other things, this means that packets to their associated connections. Consequently, only media streams that belong you can dispense with obsolete PBXs at smaller offices or in home offices. Using a single, to authenticated SIP connections can pass through the router. The only termination point combined infrastructure for voice and data offers significant benefits and savings. that is visible from the outside is the LANCOM VoIP router. There are no direct connec- All LANCOM VoIP routers work tions to terminal devices in the local network, neither via SIP nor for the voice data in with IPsec, the standard that Better organization and more savings with infrastructure RTP. is acknowledged by banks and You save yourself the extra telephone cabling – from now on, one Ethernet connection public authorities. suffices for all applications. A business VoIP router unites the PBX functions, Internet Reliability from backup lines access – also via wireless LAN – and site connectivity via VPN into a single device. What's LANCOM business VoIP routers can be operated at your existing analog or ISDN ex- more it saves on costs for the procurement and maintenance of the infrastructure. change line. You remain available under the familiar telephone numbers, and emergency calls can break-out to the local public telephone network. And even if the IP connection More flexibility or the central IP PBX should fail, you remain connected via the standard exchange line Voice over IP allows you to integrate new telephony users with the greatest of ease. and can continue to telephone with other company sites, all without having to take any Simply connect a new SIP telephone to the switch, enter the registration data and the manual changes – simply dial the corresponding extension numbers. new subscriber is already integrated into the VoIP network. This expends with the incon- venience of cable laying and any upgrades to PBX hardware. ...and you can be sure of high voice quality Once device, all functions: The LANCOM 1823 VoIP Before placing a call, the LANCOM VoIP Call Manager checks that sufficient bandwidth More efficiency is available and, if necessary, will redirect the call over the conventional telephone net- There is no need to maintain a dedicated PBX system once you have fully migrated work. If enough bandwidth is available, the LANCOM VoIP Call Manager reserves this to VoIP. Instead, extending the PBX when your company grows is handled by your IT bandwidth in the firewall exclusively for the call. To guarantee the necessary bandwidth, department – at a fraction of the cost. That saves time and money. less critical applications such as Internet surfing can be slowed. This is important to ensure the continual high quality of your call, so saving you from hearing the caller with a time delay or even from losing the connection. 4 5 LANCOM VPN branch-office networking with VoIP function The LANCOM 9100 VPN for a company main office Home office Company A company's main office is the ideal location for operating headquarters an IP PBX. This may be a software program on a high-per- formance server. IP telephones at the main office are easy to integrate into the computer network. They are connected to the IP PBX via switches. The LANCOM 9100 VPN is the ideal IP PBX equipment for secure Internet access and site connectivity. This high-performance router is designed to handle the large The LANCOM 1823 VoIP for home offices volumes of data traffic common to large companies. It tun- Employees working in their home office often require access to nels data and voice through an IPsec-based VPN. This en- SERVER internal company data and need to telephone their colleagues at sures that your external communications remain completely various company sites. Be it a laptop with a WLAN module or a protected from unauthorized access. desktop PC – both can be securely and reliably integrated into the company network. Suitable telephones include modern SIP phones but also analog DECT or ISDN phones. The device best suited for Drucker this application is the LANCOM 1823 VoIP. Small subsidiary Foreign subsidiary ISDN-Telefon The LANCOM 1723 VoIP for smaller foreign subsidiaries Do you have foreign branch offices that do not have ISDN connec- tions? This scenario is ideal for deploying the LANCOM 1723 VoIP. It connects directly to an analog line, and it can connect analog The LANCOM 1722 VoIP for smaller branch offices terminal equipment or a PBX. Large As an alternative to the LANCOM 1724 VoIP, smaller subsidiary sites that have a compact PBX can be equipped with the LANCOM 1722 VoIP (2 x ISDN S0). This allows, for instance, FAX phone calls to the main office or other sites to be conducted The LANCOM 1724 VoIP for larger branch offices at very low cost and with the convenience of internal exten- You may have an ISDN PBX system at your branch office.