Digium TE121

Price $430

The Digium TE121 is a high-performance, cost effective digital

telephony interface card with the power to create a seamless network,

interconnecting traditional telephony systems with emerging Voice over

IP technologies.

Used in conjunction with Asterisk, the TE121

can be used to deliver a wide range of PBX and IVR services to the

network or handset including Voicemail, Call Conferencing, Three-way

Calling, and VoIP Gateways.

The TE121 is a single span,

selectable T1 (24-channel), E1 (32-channel), or J1 (24-channel) card.

The card utilizes Digium's VoiceBus technology. VoiceBus technology

allows the TE121 to use an industry standard bus-mastering PCI Express

interface, as found in millions of PCs worldwide, to maximize system

compatibility and eliminate system conflicts. Improving upon the prior

TE120P which does not offer expansion capabilities, the TE121 may be

combined with Digium's VPMADT032 echo cancellation module to deliver

128ms of echo cancellation across 30 channels in E1 mode or 24 channels

in T1 mode. Bundled with the VPMADT032, the product SKU is TE121B.

The

TE121 supports both voice and data modes on its single span. For

example, the card can support 12 channels dedicated to voice, routed

directly to the Asterisk Open Source PBX, and 12 to data, handled by

the underlying Linux operating system, thus eliminating the need for an

external router. The TE121 works in both 3.3V and 5V PCI slots by auto

detecting the slot's voltage.

By utilizing our TDMoE (TDM over

Ethernet) technology, an exclusive Digium process, you can easily

connect multiple PCs equipped with the TE121 and achieve voice quality

on par with single PBX implementations. Scalability for this product is

derived from adding multiple TE121 cards to each individual PC. Add

additional cards as you need them for your expanding applications.

The

TE121 supports industry standard telephony and data protocols,

including both RBS and Primary Rate ISDN (PRI) protocol families for

voice and PPP, Cisco HDLC, and Frame Relay data modes. The board drives

both line-side and trunk-side interfaces, including call features.

(This is the PCI Express model, if you need PCI see the TE122P)

(Image shown with optional echo cancellation module)