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Allworx® Partners with ScanSource to Offer its Innovative IP-Based Phone Systems in Latin America

East Rochester, NY - June 22, 2011

Allworx (www.allworx.com), a wholly owned subsidiary of PAETEC Holding Corp. (NASDAQ: PAET), which develops awardwinning Internet Protocol (IP) phone and network systems, and ScanSource, Inc., a leading international value-added distributor of specialty technology products,announced today that they have signed an agreement to expand their marketing and sales efforts of the Allworx product line to include Latin America and the Caribbean.

ScanSource Latin America will carry the entire Allworx product line that consists of its VoIP premise-based key systems and PBX systems. The products serve a range of business sizes — from Small Office/Home Office (SO/HO) environments, up to those with 250 users. They also provide a complete IP solution for end users. Utilizing SIP Trunking, as well as traditional carrier services, the Allworx product has the flexibility to meet the basics of the market demand in Latin America and allow customers to grow their communications capabilities as their businesses grow.

Given the expansion of the Central American Free Trade Agreement, we expect an increased number of businesses to have a presence in both Central America and the United States. ScanSource is already a very important partner for us in the United States, through its ScanSource Communications sales unit, and has a solid presence in the entire Latin American marketplace,‖ said Chris Hasenauer, president of Allworx. ―As part of our strategy with ScanSource, we’re refocusing our products and marketing for resale in Latin American countries such as Colombia and Mexico, as well as in othermarkets that adhere to U.S.-based standards, including Costa Rica and the Dominican Republic.

Working with ScanSource Latin America, Allworx has already appointed and trained several third party resellers in the region.

Allworx is a natural fit for our customer base,‖ said Elias Botbol, president of ScanSource Latin America. ―Through our significant presence in Mexico and expansioninto many countries in Latin America, we believe there is great opportunity for resellers looking to offer Allworx communications solutions.

About Allworx
Allworx, a wholly owned subsidiary of PAETEC Holding Corp. and part of PAETEC’s Software and Technology Group, develops award winning phone and network systems for businesses and distributes them through a network of Authorized Partners. The product line includes the Allworx 6x and 48x systems, Px 6/2 Port Expander, and Allworx 9224 phone, Tx 92/24 Expander, 9212, 9204G and 9204 IP phones along with a series of software options. By combining the advanced features of today's VoIP systems with the key system features all businesses have grown to rely on, Allworx systems are ideal
replacements for the millions of aging (TDM) PBX and key phone systems in use today. Allworx' Consulting Division delivers elite software and digital hardware engineering services to both large and small companies who want to enhance and compliment their research and product development capabilities.
For more information please visit www.allworx.com.

About ScanSource
ScanSource, Inc. {NASDAQ:SCSC} is the leading international distributor of specialty technology products, consisting of seven sales units in North America, Latin America and Europe. ScanSource POS and Barcoding in North America, Latin America and Europe delivers AIDC and POS solutions; Catalyst Telecom in the US, and ScanSource Communications in North America and Europe, provide voice, video and converged communications equipment; and ScanSource Security in North America offers physical
security solutions. Founded in 1992, the company ranks #839 on the Fortune 1000. For more information, call the toll-free sales telephone number at 800.944.2432 or visit www.scansourceinc.com.

Allworx Media Contact
Chris Muller
PAETEC
(585) 340-8218
chris.muller@paetec.com

ScanSource Media Contact
Melissa Andrews
ScanSource
(864) 286-4425
melissa.andrews@scansource.com