The TE121B has been discontinued by the manufacturer. The replacement product is the TE133.
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 any PCI Express compliant slot.
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.
1 Port T1/E1 PRI
1 Digital Interface Port Supports both Voice and Data
Selectable T1, E1, or J1 Mode
Half-length, Low Profile, Digital Card
TE122 for use only with a 3.3V or 5.0V PCI 2.2 compliant
slot. - Bundled with VPMOCT032 Echo Cancellation Module as TE122B
TE121 for use only with PCI-Express 1.0 compliant slot. -
Bundled with VPMOCT032 Echo Cancellation Module as TE121B
Digium TE121B with Echo Cancellation Module Specifications
Digium TE121B with Echo Cancellation Module Resources