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Digium TDM431E - 3 FXS (Green) + 1 FXO (Red) Modules - Includes Echo Can (TDM431E) New


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Quick Overview

Digium TDM431E
3 FXS + 1 FXO Ports
Includes Hardware Echo Cancellation

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Condition: New

Digium TDM431E
Supported Protocols: SIP, IAX, H.323
Ports: 3 FXS + 1 FXO
Interface: PCI
Includes Echo Cancellation

TDM431E Product Description

The Digium TDM431E includes a three FXS interface modules, one FXO interface modules and the
VPMADT032 hardware echo cancellation module bundled with the TDM410 base card. The TDM431E bundle can be used with the Asterisk PBX software to deploy a powerful VoIP solution for business and personal use.

What are FXO and FXS Ports?

Analog telephone line connection - 1 call per port
FXS: Analog telephone or fax machine connection - 1 device per port

What is hardware echo cancellation?

Hardware echo cancellation is the most effective way to remove echo from a line. Digium's VPMADT032 hardware echo cancellation module is the most powerful to date and future Digium card models will likely be compatible with this model. Digium designed the new VPMADT032 to offers industrial strength 128ms(1024 taps) per-channel echo cancellation across all channels on the TDM card. The VPMADT032 provides toll-quality G.168 compliant echo cancellation to combat hybrid echo on the PSTN interface.

Though there are open source echo cancellation routines that are somewhat effective in eliminating this hybrid type echo, the VPMADT032 module resolves this problem in hardware, mitigating any negative effect CPU resource shortages may induce on an otherwise purely software based echo cancellation solution.

TDM410 Base Card Description

Using an industry-standard bursting, bus-mastering interface chip that is found within millions of PC systems worldwide, and Digium VoiceBus technology, the TDM410 eliminates the requirement for external gateways, with industry-leading performance and price. The trunk and station modules are interchangeable, allowing the creation of any combination of interfaces. The optional hardware echo cancellation module provides 1024 taps (128 milliseconds) of echo cancellation for superior voice quality on both trunk and station interfaces. Scaling of this solution is accomplished by adding additional TDM410 or other Digium analog interface cards.

The naming convention for the TDM bundles is as follows: TDM X Y B/E. Where "TDM" denotes that the card is in the TDM series, "X" denotes the number of FXS modules and "Y" denotes the number of FXO modules. If the model number includes a "B" indicates that that this product is a bundle and if it includes an "E" it indicates that it is a bundle with echo cancellation.


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