Iowa Network Services and Onvoy Voice Services Select Tekelec for SS7 and VoIP Network Performance Management

MORRISVILLE, NC--(Marketwire - August 17, 2009) - Tekelec (NASDAQ: TKLC), the
network signaling, mobile messaging and performance management company, has
been selected to monitor signaling system 7 (SS7) and voice over Internet
protocol (VoIP) traffic by Iowa Network Services (INS) and Onvoy Voice
Services. INS and Onvoy operate and co-own the SS7 network, and had a need
to monitor the increasing volume of IP traffic on their individual
networks. Tekelec's Integrated Applications Solution (IAS) will
monitor, correlate and report on multi-protocol network traffic to deliver
critical business intelligence information for troubleshooting, traffic
management and improved network efficiency.

In May of this year, INS and Onvoy replaced their existing performance
management product with the IAS solution because of Tekelec's comprehensive
network monitoring and reporting capabilities in both signaling
system 7 (SS7) and session initiation protocol (SIP) domains.
In addition, IAS integrates with Tekelec's EAGLE® 5 core network signaling platform,
thereby reducing costs and streamlining operations by minimizing the need
for passive probes to collect traffic data.

"Tekelec gives us the great benefit of analyzing trouble reports, billing
issues and network traffic patterns to identify potential problems and
better serve our customers," said Bob Sherlock, vice president of
engineering for Iowa Network Services, a network of independent telephone
companies that provides telecommunications services in rural Iowa. "IAS is
the ideal way to collect SS7 and SIP data, and its ability to store 60 days
of traffic allows us to easily compare historical and real-time network
performance information."

IAS provides sophisticated data collection, correlation and reporting for
more than 150 global wireline and wireless service providers. Through the
analysis of network- and service-level traffic, IAS delivers new levels of
network, service and customer intelligence, thereby improving subscribers'
quality of service (QoS) and quality of experience (QoE). The solution
offers troubleshooting capabilities and key performance indicators (KPIs)
to support traffic management, security, and wireless services such as
roaming, prepaid and short message service (SMS). The IAS platform
supports both Time-Division Multiplexing (TDM) and VoIP networks with a
common set of applications, troubleshooting between the two network domains
in real time.

"Onvoy Voice Services continues to invest in the tools required to enhance
the information available to our customers and to advance our SS7 service
offering," said Fritz Hendricks, president of Onvoy, a wholesale telecom
services provider based in Minnesota. "In using the Tekelec IAS, Onvoy has
established an end-to-end, real-time and historical network monitoring
system. The Tekelec IAS system enables Onvoy to rapidly identify the origin
of suspect, non-billable traffic, thereby supporting our customer revenue
collection efforts. This will be a differentiator for customers as we work
together to expand into new markets."

Tekelec's traffic management KPIs enable service providers to quickly
determine network traffic type, volume, origination and destination, as
well as causes for uncompleted calls. The resulting intelligence ensures
that traffic is managed properly and routed in the most efficient and
cost-effective manner.

"The signaling layer is the best source to pinpoint anomalous network
activity and areas requiring troubleshooting," said Ron de Lange, executive
vice president at Tekelec. "We are excited about our deeper relationship
with INS and Onvoy, and the improvements they're targeting to enhance
customers' quality of service and experience."

For more information about IAS, Tekelec has a free "Customer
Service Assurance" white paper available for download. Prepared by
Stratecast Senior Consulting Analyst Karl Whitelock and Tekelec, the paper
contains five case studies of customer service assurance implementations.

About Tekelec

Tekelec, a global leader in core multimedia session control, mobile
messaging and network intelligence, ensures scalable, secure and highly
available communications. The company's market-leading signaling solutions
enable the interworking of different network applications, technologies and
protocols, providing a smooth transition to next-generation networks.
Tekelec has more than 20 offices around the world serving customers in more
than 100 countries, with corporate headquarters located near Research
Triangle Park in Morrisville, N.C., U.S.A. For more information, please
visit www.tekelec.com.

About Onvoy Voice Services

Onvoy Voice Services, a subsidiary of Zayo Group, has been offering a full
suite of wholesale services to wireless, wireline, cable and broadband
telephone companies since 1991. Onvoy provides tandem and transit,
wholesale CLEC, long distance, SS7/database services, and call management
solutions such as directory assistance and operator services. Onvoy Voice
Services is headquartered in Minnesota and continues to expand, now
offering services throughout the Midwest and Great Lakes regions.

About Iowa Network Services

Iowa Network Services (INS) is privately owned by a group of 127
Independent Telephone Companies that has served 500,000 rural Iowans since
1989. The INS Network has been delivering the latest in telecommunications
services and it continues to grow. Telephony, core network transport,
broadcast video and Internet services via netINS are among the products
offered by INS to telephone companies across the state of Iowa and to
enterprise customers nationwide. For more information, visit
www.IowaNetworkServices.com or call 800-469-4000.

FORWARD-LOOKING STATEMENTS

Certain statements made in this press release are forward looking, reflect
the Company's current intent, belief or expectations and involve certain
risks and uncertainties. The Company's actual future performance may differ
materially from such expectations as a result of important risk factors,
which include, in addition to those identified in the Company's 2008 Form
10-K, 2009 First and Second Quarter Form 10-Q and its other filings with
the Securities and Exchange Commission, the effect of the current or
escalating economic crisis including the impact of credit availability and
currency fluctuations on overall capital spending by our customers, the
current or further detrimental changes in general economic, social, or
political conditions in the countries in which we operate, the timeliness
and functional competitiveness of our product releases, the timing of our
recognition of revenues and changes to the accounting rules related
thereto, our ability to maintain OEM, partner, and vendor support and
supply relationships, business interruptions at the Company, its suppliers
or customers resulting from the recent or subsequent flu pandemics, our
ability to compete with other manufacturers that have lower cost bases than
ours and/or are partially supported by foreign governments or employ other
unfair trade practices, our ability to integrate acquisitions, our ability
to protect intellectual property rights or the risk of infringing and
litigating with others regarding their intellectual property rights, and
changes in the market price of the Company's common stock. The Company
undertakes no obligation to publicly update any forward-looking statements
whether as a result of new information, future events or otherwise.