E1 Echo Canceller
E1 Voice Over IP
VPN Network Management
IP•Tube DLE1-Ecan OPTIONS
Lossless Data Compression Option -C
TDM over IP WAN bandwidth is not consumed by silent or redundant circuits.
Note: Compression only supported with IP•Tube DLE1-Ecan-C models.
Protector OPTION -PRO
The Enhanced version has configuration parameters that enable a secondary packet path with high relative delay to primary path be synchronized. The packet sequence delay synchronization ensures concurrent redundancy with a high degree of error tolerance. Error free operation is accomplished when a primary or secondary Packet is not received and a redundant duplicate packet is available. The IP•Tube also supports the transmission of multiple duplicate packets to support Mission Critical Circuit extension with redundancy that is only limited by the bandwidth provisioned.
E1 Switch OPTION -SWT
The E1 switch option enables the E1 Port 1 interface to be manually switched between a E1 circuit connected to E1 Port 2 or to E1 Over IP packets connected with the remote IP•Tube.
E1 Link Protector OPTION -LPT
The E1 Link Protector provides an automatic back up for E1 circuits with E1 Over IP connecting via Wireless Ethernet, Gigabit Ethernet, IP Satellite Services, xDSL,....
DS0 Timeslot Multiplexor OPTION -MUX
The IP•Tube DLE1-ECAN-MUX maps DSOs from a central site to as many as 31 remote locations via an IP/Ethernet connection. Get maximum use of expensive DS1 interfaces on PBX, Channel equipment and datacom gear. Also provides Virtual DACS Over IP capability. Mesh DS0s one-to-many or many-to-many.
Rate Limiter OPTION -RLM
The IP•Tube DLE1-ECAN-RLM Rate Limiter option limits the WAN bandwidth utilized by the LAN1 to LAN2 bridge. Rate Limiting the traffic enables the reservation of the WAN bandwidth for time the sensitive E1 Over IP real time connections. Great for Wireless WAN E1 applications. Rate Governing is only applied in the direction to the WAN to minimize latency. The data rate governor utilizes Time Division Multiplexing based clocking to provide for Nx64, NxE1 and NxFT3 bandwidth regulation that is configured from 64 kilobits up to 45Mbits.
Alternator Load Balancing OPTION -ALT
The IP•Tube DLE1-Ecan-ALT Alternator option alternatively sends the IP packetized E1 frames on LAN 1 and LAN 2. The Alternator option enables fractional and full E1 circuits to be split over two IP WAN connections such as xDSL. The Lossless Data Compression option can be combined with the Alternator option to minimize the bandwidth required from the alternative paths.
Pay-As-You-Grow Field Upgrades
The IP•Tube DLE1 Ecan are designed for Pay-As-You-Go growth from 1 E1 to 2 E1s. Customers can elect to economize initial installations, buy purchasing a single active E1 port and enable the additional E1 Port via a software-based license key. NOTE: Each E1 Port has its own DSP Echo Cancellation hardware that is installed during assembly so it is NOT possible to field upgrade.
Field Upgrade benefits are extended to our Industry-Best Loss less Data Compression. Just as E1 ports are field upgrade able, so is Loss less Data Compression. At any time, each E1 port on the IP•Tube DLE1-Ecan can be upgraded to Loss less Data Compression with a simple software-based license key installation. If you determine that your IP•Tube DLE1-Ecan is best deployed with Loss less Data Compression, your still in business with the per port field upgrade!
|Far End Echo Cancelling IP•Tube DLE1-Ecan utilizes a Digital Signal Processor that detects and cancels echo at the far end so that the packet network delay has no impact on echo. The echo canceller samples the voice signal, estimates and removes the echo, leaving the original speech. The linear digital signal processor (DSP) models the echo and performs the main echo cancellation task. A non-linear DSP processor is then optimally employed to subtract out any residual echo or reflected noise components. |
Echo is one of the most important factors that affects voice quality. The presence of echo depends on both echo level and echo delay. The primary source of echo is the impedance mismatch at the hybrid that links a 2-wire analog loop to a 4-wire digital trunk. The hybrid is not completely efficient in carrying the electrical energy and a certain amount of the electrical energy, or voice signal, is reflected back and may be perceived as echo.
Occasionally, acoustic feedback of certain phones also causes noticeable echoes. These sources of echo are able to be cancelled by the human brain as long as the time between our speech and the echoed speech is not greater than 32 milliseconds.
|Engage's E1 Over IP products have a minimum delay configuration, 1 millisecond packetization and 4 packet buffering, which introduces a delay of 5 milliseconds. The amount of delay introduced by the packet network depends upon its switching times, packet processing, packet jitter, transmission, loading and quality of service configuration.|
For example a network connection that utilizes Gigabit Ethernet switches, which introduce delays in the microseconds, does not require echo cancellation. Wide Area Networks that traverse an intranet or internet backbone have varying degrees of delay which can easily exceed 28 milliseconds. Total round trip delays in excess of 32 millisecond makes echo perceptible.
The IPTube’s Echo Cancellation provides the elasticity to support clear connections across networks with significant delay and packet jitter.
|E1 Private Line Services Over IP|
|Businesses, Education Districts, Universities, National, State and Local Government, incur significant recurring monthly costs for rigid-bandwidth leased lines used only for the interconnection of PBXs and Telecom switches.|
The IP•Tube DLE1-Ecan provides enterprises with the ability to interconnect their existing phone systems over flexible bandwidth lines that are used to carry data, voice, and video. The Voice Only Leased Line Toll charges assessed by long distance and local carriers are eliminated or dramatically reduced by transporting voice traffic across LANs and WANs.
The most compelling option for the interconnection of E1 based systems is when it can be accomplished over a Local Area Network. The deployment of Fiber based LANS such as FDDI and Gigabit Ethernet, provides organizations with high performance and high quality bandwidth that is especially well suited for the interconnection of PBXs and Telecom Switches.
Wide Area Networks that have sufficient bandwidth and Quality of Service provisioning result very significant cost savings especially for Multinational Corporations. The IP•Tube DLE1-Ecan-C with loss less data compression, detects idle and redundant data within each voice circuit resulting in a 56 to 1 bandwidth savings. WAN bandwidth is not consumed by silence or redundant samples.
Broadband Service Providers
Metropolitan Area Networks
Telcos reduce costs by delivering profitable leased and private line services over their flexible Ethernet infrastructures.
CLEC PBX Back Haul
The IP•Tube DLE1-Ecan provides CLECs with a way to back haul E1 DS0s from a customer’s phone systems over their Internet connection. The back hauled DS0s are connected to the CLECs phone switch for connection to the Public Switched Telephone Networks. Local Exchange Carriers are able to offer an economical alternative to the local Phone Company.
Wireless EthernetConnecting phone systems across a wireless Ethernet connection has a return on investment that is measured in weeks. Eliminating the wired connection for the E1 based communication equipment is made possible with the IPTube’s E1 Over Ethernet capability.
Echo Cancellation enables Wireless connections to support E1 Over IP real time connections in a point to point or point to multipoint configuration with the elasticity required.