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Teltronics 20-20 - Product Specifications The 20-20' flexible and modular architecture enable it to be customized and adapt to a wide range of evolving applications. The 20-20 consist of a non-blocking switching matrix and a common control system consisting of microprocessors, memory, disk drives and telephone control equipment. The two models have different common controls but share a common interface for trunks and lines. This universal port architecture allows assignment of lines, trunks and service units to any interface slot helping to eliminate some expenses on upgrades. |
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IP Trunk Unit (IPTU) The IPTU is a gateway between two 20-20 systems allowing voice traffic to be carried over an IP-based data network. Full 20-20-to-20-20 feature transparency is supported via Teltronics Defined Networking (TDN). The IPTU connects thirty 20-20 ports directly to a 10/100BaseT connection to deliver 30 virtual trunk circuits over the IP network. These trunks can be assigned as point-to-point or multi-point. The IPTU is used with the 20-20 as well as legacy systems such as the MAP, LX, and LH. The IPTU connects to data network using either a front panel RJ45 jack, or terminated at the rear using an access assembly. Voice packets are encoded using G.711, and G.729a or G.729ab, with VAD/CNG support. |
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The IPTU is set up as a trunk group and calls are routed to the IPTU, as they would be to a PRI module. In a typical configuration, 20-20 systems at remote sites are connected over a Wide Area Network (WAN). Multiple IPTU modules may be used to create additional traffic capacity between two 20-20 systems or to establish paths to additional systems. The VoIP Station Unit (IPSU) and VoIP TelephonesThe IPSU is a module that connects VoIP telephone sets to the 20-20 using an IP-based data network. Typically, this is a Local Area Network but can be any IP network that offers the appropriate QoS. This allows a smooth transition to VoIP at the desktop while maintaining all current capabilities of the 20-20 to support legacy telephone sets. Call routing to/from the VoIP telephone is controlled by the 20-20 system. The IPSU supplies 32 station connections directly to a 10/100BaseT Ethernet port, which is connected to a managed Ethernet switch. This module supports the same voice encoding compression technologies as the IPTU. The IPSU is used with the 20-20 as well as legacy systems such as the MAP, LX, and LH. VoIP telephone extensions are configured in the system the same way as current extensions. Teltronics offers IP-based telephones that provide features consistent with those of ClearCom phones, plus enhanced IP features. The IPSU extends the power and flexibility of the 20-20 to users at your main location as well and those in smaller offices and remote home offices. IP Gateway Unit (IPGW) The IPGW is a gateway SIP or module that enables voice traffic to be carried over an IP-based data network connecting the 20-20 to any number of other H.323 or SIP systems. The IPGW connects thirty 20-20 ports directly to a 10/100BaseT connection to deliver 30 virtual trunk circuits over the IP network. These trunks can be assigned as point-to-point or multi-point. The IPGW is used with the Cerato ME/LE as well as legacy systems such as the MAP, LX, and LH. The IPGW connects to data network using either a front panel RJ45 jack or terminated at the rear using an access assembly. Voice packets are encoded using G.711, and G.729a or G.729ab, with VAD/CNG support. An external SIP or H.323 gatekeeper routes calls to the 20-20 via the IPGW. The external gatekeeper operates independently of the 20-20. |
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