News Release

Sangoma Technologies Ships A301, T3/E3 Voice/Data Card

NEWS RELEASE TRANSMITTED BY CCNMatthews

FOR:  SANGOMA TECHNOLOGIES CORPORATION

TSX VENTURE SYMBOL:  STC

APRIL 7, 2005 - 15:12 ET

Sangoma Technologies Ships A301, T3/E3 Voice/Data Card

TORONTO, ONTARIO--(CCNMatthews - April 7, 2005) - 

T3/E3 Card Supports Clear Channelized Data transport at speeds to 
44.7Mbps

Sangoma Technologies Corporation (TSX VENTURE:STC) (www.sangoma.com), a 
leading provider of connectivity hardware and software products 
supporting voice transport, WANs and Internet infrastructure, is now 
shipping its A301 AFT (Advanced Flexible Telecommunications) 
unchannelized T3/E3 card.

The A301 card is a 2U PCI adapter that supports clear channel T3 (44.7 
Mbps) and E3 (34.4 Mbps) over dual BNC connectors. The card is targeted 
for larger organizations or ISPs that have outgrown their multiple T1 
data links. Sangoma's A311 card to be released later this year will 
provide fully channelized T3 capability for the voice market.

"As the line speed increases and the number of users dependent on that 
link grows, the consequences of link failure become more and more 
catastrophic," says Sangoma Technologies President and CEO David 
Mandelstam. "For this reason our T3/E3 development testing has focused 
heavily on hardware and driver reliability under all circumstances, 
including instantaneous recovery from line fault conditions."

"The A301 card has performed exceptionally well in our environment," 
adds Nathan Whittacre of Whittrio, Inc., a Las Vegas-based voice and 
data service provider. "On a new line with extensive teething troubles, 
the A301 gracefully recovered from every network event."

The A301 is the latest addition to Sangoma's family of cards that 
currently includes the A101 (single port), A102 (dual port) and A104 
(four-port) card.

Technical Specifications:

- Dimensions: 2U Form factor: 120mm x 55 mm for use in restricted 
chassis.

- 32 bit bus master DMA data exchanges across PCI interface at 132Mbps 
for minimum host processor intervention.

- Ring buffer DMA handling for minimum host intervention and guaranteed 
data integrity on high volume systems.

- Intelligent hardware: Downloadable Field Programmable Gate Array 
programming with multiple operating modes. Allows new features to be 
added when they become available.

- Power: 800mA peak, operational 300mA max at +3.3v or 5v.

- Autosense compatibility with 5v and 3.3v PCI busses.

- Temperature range: 0 - 50C.

T3/E3 Standards:

- DS3/E3 Framer: ANSI T1.107_1988, ANSI T1.107_1989, T1.404, ITU-T G.751,

- ITU-T G.832, Bellcore TR-TSY-000009 and AT&T Pub 54014.

- LIU Receiver: G.775, GR-449, ITU G.751, ITU G.752, ITU G.755, ETSI TBR 
24, and GR-499-CORE, 1995.

- LIU Transmitter: Bellcore GR-499, GR-253 and ANSI T1.102.

- Jitter Attenuator: T1.105.03b, ETSI TBR-24, Bellcore GR-253 and GR-499.

About Sangoma Technologies Corporation

Founded in 1984, Sangoma develops and manufactures voice transport and 
wide area network (WAN) communication hardware and software products, 
with an emphasis on the PC platform. The communications solutions, 
voice, data and video gateways support all popular WAN networks, line 
protocols and all standard PC operating systems and platforms including 
Linux, Windows, FreeBSD, Sun Solaris, NetWare and DOS. Sangoma 
Technologies Corporation is publicly traded on the TSX Venture Exchange 
(TSXV: STC - News).

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FOR FURTHER INFORMATION PLEASE CONTACT:
Sacke & Associates Inc.
Sheldon Rose
(416) 493-5723, ext. 202
sheldonr@sackepr.com