Angebote zu "Voip" (15 Treffer)

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Patton SmartNode Dual FXS VoIP Gateway 1x10/100...
206,67 € *
zzgl. 5,98 € Versand

Patton SmartNode Dual FXS VoIP Gateway 1x10/100baseT H.323 and SIP External UI Power (Sn4112/js/eui)

Anbieter: Rakuten
Stand: 26.02.2020
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Patton SmartNode Sn4118 8 FXS VoIP Gateway, 1x1...
407,61 € *
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Patton SmartNode Sn4118 8 FXS VoIP Gateway, 1x10/100baseT, H.323 und SIP External UI Power (Sn4118/js/eui)

Anbieter: Rakuten
Stand: 26.02.2020
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Patton SmartNode 4524 4 FXS VoIP GW-Router 2x10...
401,70 € *
zzgl. 5,29 € Versand

Patton SmartNode 4524. Management-Protokolle: Web/HTTP, Cli, Tftp, Snmp Mib, MIB II. Energiebedarf: 100-240Vac, 50/60Hz, 12WPatton SmartNode 4524. Management-Protokolle: Web/HTTP, Cli, Tftp, Snmp Mib, MIB II. Energiebedarf: 100-240Vac, 50/60Hz, 12W

Anbieter: Rakuten
Stand: 26.02.2020
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YATE Yet Another Telephony Engine
49,00 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Yate is a telephony engine, a softswitch with PBX capabilities, originally created in 2004 by Paul Chitescu of NullTeam. It is released under a GNU General Public License with an exception for linking with OpenH323 and PWlib (licensed under MPL). Started as a free/open source softswitch for connecting PSTN with VoIP, support for other telephony technologies like conference, PBX, IVR has been added later on. During the years Yate has evolved into a Unified Communications server providing advanced integration with instant messaging, video and fax. Historically the basic function of Yate is the softswitch, connecting together call legs either to external devices or internal server resources. The logic for routing calls uses messages and can be implemented in configuration files, database queries or external programs. Call signalling is possible using PSTN protocols like ISDN or SS7, either directly attached over a TDM interface card (T1, E1, BRI), analog interface or by a remote Signaling gateway. A variety of VoIP protocols can be used without the need of special hardware: SIP, H.323, IAX2 or Jingle

Anbieter: Dodax
Stand: 26.02.2020
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Hole Punching
34,00 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hole punching is a computer networking technique for establishing communications between two parties in separate organizations who are both behind restrictive firewalls. Used for applications such as online gaming, P2P and VoIP, both clients establish a connection with an unrestricted third-party server that uncovers external and internal address information for them. Since each client initiated the request to the server, the server knows their IP addresses and port numbers assigned for that session, which it shares one to the other. Having valid port numbers causes the firewalls to accept the incoming packets from each side. UDP hole punching and TCP hole punching respectively use User Datagram and Transmission Control Protocols.

Anbieter: Dodax
Stand: 26.02.2020
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Principles, Systems and Applications of IP Tele...
80,24 € *
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These are the proceedings of IPTComm 2008 - the Second Conference on Pr- ciples,Systems andApplications ofIP Telecommunications-heldinHeidelberg, Germany, July 1-2, 2008. The scope of the conference included recent advances in the domains of convergent networks, VoIP security and multimedia service environments for next generation networks. The conference attracted 56 s- missions, of which the Program Committee selected 16 papers for publication. The review process followed strict standards: each paper received at least three reviews. We would like to thank all Program Committee members and external reviewers for their contribution to the review process. The conference attracted attendees from academia and industry. Its excellence is re?ected in the quality of the contributed papers and invited talks. Additional industry talks and - plied demonstrations assured a synergy between academic and applied research. We would also like to acknowledge and thank our sponsors, many of whom s- portedtheconferencegenerously:NEC,AT&T,Codenomicon,IPTEGO,EADS, Cellcrypt, MuDynamics, SIP Forum and EURESCOM, Finally, we would like to thank all the researchers and authors from all over the world who submitted their work to the IPTComm 2008 conference.

Anbieter: Dodax
Stand: 26.02.2020
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Intellinet 525787 WLAN Access Point 1300 Mbit/s...
214,77 € *
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Add performance and security to your business' wireless network with the Intellinet High-Power Wireless AC1750 Dual-Band Gigabit PoE Access Point. Concurrent 2.4 and 5 GHz Performance The main benefit of a dual-band AC access point is the ability to shift traffic from the congested 2.4 GHz band to the relatively uncluttered 5 GHz space. So, you can use the 2.4 GHz band for your everyday tasks, such as surfing the Internet, social media or e-mail, while the 5GHz AC band can be used for heavy-duty traffic like the important VoIP calls in your business environment. Backward Compatible AC is the next generation of wireless technology, providing faster speed and improved coverage. But if none of the devices you own support Wireless AC, never fear — the Intellinet High-Power Wireless AC1750 Dual-Band Gigabit PoE Access Point is backward compatible with older 802.11b/g/n/a devices, so you can connect virtually any of your wireless devices to it. Fast Roaming through 802.1X PMK Caching Every time an 802.1X EAP-enabled client moves from one access point to another, it has to re-authenticate. While that process is generally quick, it still can cause disruptions in voice-over-IP calls due to the small delay created by the authentication. This is where 802.1X caching comes in. This technology virtually eliminates that delay by caching Pairwise Master Keys (PMK), making seamless roaming truly a reality. Your mobile WiFi users will thank you for that. Power over Ethernet Ports The Intellinet High-Power Wireless AC1750 Dual-Band Gigabit PoE Access Point comes with a PoE+ PD port. This port can be used to power the AP from an IEEE 802.3at PoE+-compliant LAN switch, which is very convenient in situations where AC power is not readily available. Should you prefer to use a power adapter instead of PoE, that's okay, too, since we have included a standard 12V power adapter. Secure Communications The Intellinet High-Power Wireless AC1750 Dual-Band Gigabit PoE Access Point provides maximum wireless security by supporting 802.1x user authentication for external RADIUS servers and, thanks to its internal RADIUS server, the access point can be used as the authentication server for 256 different user accounts in smaller to medium-sized networks. Other security features included in this access point are MAC address filtering, disable SSID broadcast and support for the latest wireless encryption mechanisms.

Anbieter: Dodax
Stand: 26.02.2020
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D-Link DXS-1210-12SC Managed network switch L2 ...
1.253,87 € *
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D-Link’s DXS-1210 series 10 Gigabit Ethernet Smart Managed Switches are cost effective 10 GbE switches capable of servicing a range of network needs in any business. With high performance and low latency, these switches can fulfill the needs for virtualization, cloud services and server-to-server applications, making them perfect for SMB networking applications. DXS-1210 series switches offer a combination of 10GbE copper and fiber ports. The 10GBASE-T copper ports utilize RJ45 interfaces and support 10 Gigabit speeds over CAT6a/CAT7 LAN cabling up to 100m. The 10GbE fiber ports can be connected to other 10GbE ports with low cost Direct Attach Copper (DAC) cables, or with SFP+ optical transceivers on multimode or single-mode fiber optic cabling. Energy Saving Incorporating D-Link Green technology, these switches are capable of powersaving without sacrificing operational performance or functionality. They feature built-in smart fans with internal heat sensors that monitor and detect temperature changes and react accordingly by utilizing different fan speeds for different temperatures. At lower temperatures, the fans run slower, reducing the switch’s power consumption and noise. Link status drastically reduces power consumption by automatically toggling all ports without a link to sleep mode. The DXS-1210 switches take the approach to green IT one step further by incorporating a special chipset with advanced silicon technology for efficient use of energy. Extensive Management and Layer 2 Features The DXS-1210 Series comes with a complete lineup of L2 features, including port mirroring, Spanning Tree Protocol (STP), and Link Aggregation Control Protocol (LACP). Network maintenance features include loopback detection and cable diagnostics. Loopback detection significantly speeds up troubleshooting by automatically detecting and shutting down difficult to diagnose switching loops. The cable diagnostic feature, designed primarily for administrators and customer service representatives, determines the quality of connected cables, and quickly discovers errors, allowing hassle-free diagnostics and maintenance. QoS, Bandwidth Control The DXS-1210 Series supports Auto Surveillance VLAN (ASV) and Auto Voice VLAN, which are best suited for video surveillance and VoIP deployments. Auto Surveillance VLAN consolidates data and surveillance video transmission through a single switch, thus sparing businesses the expense of dedicated hardware and facilities. ASV also ensures quality real-time video monitoring and control without compromising the transmission of conventional network data. Auto Voice VLAN technology enhances the VoIP service by automatically placing voice traffic from IP phones to a designated VLAN. With higher priority and an individual VLAN, these features guarantee the quality and security of VoIP traffic. The Differentiated Service Code Point (DSCP) markings on Ethernet packets enable different levels of service to be assigned to network traffic. As a result, these voice and video packets take precedence over other packets. In addition, with bandwidth control, network administrators can reserve bandwidth for important functions that require higher priority or more bandwidth. Secure your Network D-Link’s innovative Safeguard Engine® protects the switches against traffic flooding caused by malicious attacks. The DXS-1210 Series supports 802.1X port-based and host-based authentication, allowing the network to be authenticated through external RADIUS servers. The Access Control List (ACL) feature enhances network security and helps to protect the internal IT network. The DXS-1210 Series also features Address Resolution Protocol (ARP) spoofing prevention, which protects from attacks on the network that may allow an intruder to sniff data frames, modify traffic, or bring traffic to a halt altogether by sending fake ARP messages. To prevent ARP spoofing attacks, the switches use packet control ACLs to block invalid packets that contain fake ARP messages. For added security, the DHCP server screening feature filters DHCP replies on unauthorized ports to prevent them from being assigned an IP address. Versatile Management The DXS-1210 Series comes with the D-Link Network Assistant (DNA) utility that simplifies the configuration of devices that support the D-Link Discovery Protocol. The D-Link Network Assistant utility easily allows customers to discover multiple D-Link Smart Managed Switches within the same L2 network segment and displays them on screen for instant access. With this utility, users do not need to change the IP address of their PC. This utility further allows for simultaneous configuration and basic setup of all discovered devices, including password changes and firmware upgrades. The DXS-1210 Series also supports D-View 7 and Command Line Interface (CLI) through Telnet. D-View 7 is a network management system that allows for the central management of critical network characteristics such as availability, reliability, resilience, and security. Seamless Integration The DXS-1210 Series switches’ copper ports can support Gigabit connections over existing CAT5/5e twisted-pair cables, and can support 10-Gigabit connections (10GBASE-T) over CAT6 and above. The DXS-1210-12TC has eight 10GBASE-T ports, two SFP+ ports and two 10GBASE-T/SFP+ combo ports, while the DXS-1210-12SC has ten 10G SFP+ ports and two 10GBASE-T/ SFP+ combo ports. This means they provide a more flexible solution for upstream or downstream server connections, making network administration easy. Limited Lifetime Warranty D-Link offers a Limited Lifetime Warranty on the DXS-1210 Series 10 Gigabit Ethernet Smart Managed switches to further its commitment to product quality and long term customer confidence.

Anbieter: Dodax
Stand: 26.02.2020
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Extreme networks Summit X250e-48p Managed Power...
1.698,99 € *
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48 10/100BASE-TX with PoE, 2 gigabit combo ports (2 unpopulated gigabit SFP and 10/100/1000BASE-T), 2 SummitStack stacking ports, ExtremeXOS Edge License, 1 AC PSU, connector for EPS-C external redundant power system chassis (requires EPS-600LS) Summit® X250e series 24- or 48-port copper and fiber Fast Ethernet stackable switch is a compelling converged edge product with its revolutionary modular operating system, ExtremeXOS™. Summit X250e series switches are based on the revolutionary ExtremeXOS core-class operating system from Extreme Networks®. ExtremeXOS is a highly resilient, modular operating system that can provide continuous uptime, manageability and operational efficiency at an affordable price. Summit X250e provides high availability and performance with its advanced traffic management capabilities to support large scale rollout of converged network that supports devices such as IP telephones, wireless APs and other devices that require power from a LAN connection as well as the regular , computing devices such as desktop and laptop computers. Summit X250e-24p and Summit X250-48p support the 802.3af standards-based Power over Ethernet (PoE) on every port with its PoE models. - Modular ExtremeXOS operating system. - IPv4/IPv6 hardware based routing and ACL. - Resiliency to support convergence. - Performance to support converged services. - Security features to support converged LAN. - Convergence Grade High-Speed Stacking – SummitStack. Powered by ExtremeXOS, the Summit X250e switch supports process recovery and application upgrades without the need for a system reboot. Summit X250e provides the high network availability required for converged applications. Summit X250e offers dual stacking interfaces to provide high-speed 40 Gbps stacking bandwidth. SummitStack™ stacking architecture is designed to support converged services such as video and VoIP by its highly available, rapid failover capability with n-1 master redundancy, distributed Layer 2 and Layer 3 switching, link aggregation across stack and distributed uplinks. SummitStack supports up to eight units in a stack, mixture of the units with Summit X250e, Summit X450e, Summit X450a and Summit X450 switches, provides sub seconds failover for path failure and hitless master/backup failover along with hitless protocol support such as OSPF graceful restart, PoE configuration, Network Login user authentication. Summit X250e provides chassis-like management and availability with its SummitStack stacking technology. - ExtremeXOS modular operating system. - Quality of Service (QoS) with minimized latency. - Ethernet Automatic Protection Switching (EAPS) resiliency protocol - Non-Blocking Forwarding. - Threat detection and response instrumentation to react to network intrusion. - Hardened network infrastructure.

Anbieter: Dodax
Stand: 26.02.2020
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