- --------------------------------------------------------------------------------


                             SECURITIES AND EXCHANGE
                                   COMMISSION
                             WASHINGTON, D.C. 20549
                  --------------------------------------------

                                                               FORM 8-K

                                                            CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                        Securities Exchange Act of 1934

                                 March 29, 2004

                Date of Report (Date of earliest event reported)
                  --------------------------------------------

                              SONUS NETWORKS, INC.
             (Exact Name of Registrant as Specified in its Charter)


      DELAWARE                      000-30229                  04-3387074
    -----------                     ---------                  ----------
(State or Other Jurisdiction  (Commission File Number)       (IRS Employer
  of Incorporation)                                        Identification No.)



             250 APOLLO DRIVE, CHELMSFORD, MASSACHUSETTS    01824
               (Address of Principal Executive Offices)   (Zip Code)

                                 (978) 614-8100
              (Registrant's telephone number, including area code)





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Item 12. RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

     The information in this Current Report on Form 8-K and the exhibit attached
hereto shall not be deemed  "filed" for purposes of Section 18 of the Securities
Exchange Act of 1934,  as amended,  or  incorporated  by reference in any filing
under the  Securities  Act of 1933, as amended,  or the Exchange Act,  except as
shall be expressly set forth by specific reference in such a filing.

     On March 29, 2004,  Sonus  Networks,  Inc.  (Sonus)  issued a press release
providing an update on the status of its financial  results. A copy of the press
release is attached as Exhibit 99.1 hereto.

     On March 29,  2004 at 8:30  a.m.,  Sonus  will host a  conference  call and
simultaneous  webcast to discuss the contents of this press  release.  A copy of
the script for this conference call is attached as Exhibit 99.2 hereto.










                                    SIGNATURE


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


Date: March 29, 2004                       SONUS NETWORKS, INC.

                                           By: /s/ Stephen J. Nill______________
                                              ----------------------------------
                                               Stephen J. Nill
                                               Chief Financial Officer,
                                               Vice President of Finance and
                                               Administration and Treasurer








                                  Exhibit Index

99.1 Press release dated March 29, 2004.

99.2 Script for Conference Call dated March 29, 2004.




                                                                    Exhibit 99.1

  Sonus Networks Provides Update on Status of Its Financial Results

    CHELMSFORD, Mass.--(BUSINESS WIRE)--March 29, 2004--Sonus Networks
(Nasdaq: SONS), a leading provider of voice over IP (VoIP)
infrastructure solutions, today announced that the filing of its
amended Annual Report on Form 10-K/A for the fiscal year ended
December 31, 2003 will be delayed. The Company, having made
substantial progress towards the completion of its review of 2003 and
2002 financial results, is now considering whether to expand the
review to include additional prior periods. Sonus Networks'
independent auditor, Ernst and Young LLP, was not the auditor of
record for periods prior to 2002. Therefore, in the event that the
Company determines its review should be expanded to include periods
prior to 2002, such review and accompanying audit could be lengthy.
    Sonus Networks is performing a detailed review of the timing of
revenue recognized from customer transactions and of other financial
statement accounts. The revenue issues under examination relate to the
proper timing of revenue recognition and not whether the sales could
ultimately be recorded as revenue. For the customer transactions under
review, the products have been delivered and Sonus Networks has either
received payment or is receiving payment for the products in the
ordinary course.
    At this time, the Company expects that its review will lead to a
restatement of historical financial statements for the fiscal year
ended December 31, 2002 and for the first three quarters of fiscal
year 2003. As a result, existing financial statements for those
periods should not be relied upon. Sonus Networks does not expect that
these restatements will impact its December 31, 2003 cash, cash
equivalents and marketable securities balance, which exceeded $300
million.
    "While today's announcement is regrettable, we are committed to
accurate and transparent financial reporting and require additional
time to complete our comprehensive review," said Hassan Ahmed,
president and CEO, Sonus Networks. "Our business is strong and Sonus
continues to build on its leadership position in the rapidly expanding
VoIP market. We continue to add new customers, build important new
partnerships and enhance our industry-leading product portfolio. We
have a great deal of confidence in our business outlook for 2004."
    As a result of the Company's delay in filing its Form 10-K for
2003, Sonus Networks expects to receive notification from Nasdaq that
it is not in compliance with the filing requirements for continued
listing on Nasdaq and that its securities could be subject to
delisting from the Nasdaq National Market. In addition, Sonus Networks
anticipates that Nasdaq may change the Company's trading symbol from
"SONS" to "SONSE." Sonus will make a timely request for a hearing
before a Nasdaq Listing Qualifications Panel to address the filing
deficiency, but there can be no assurance that the Panel will grant a
request for continued listing.

    Company Conference Call, Webcast and Replay Information

    The Company will host a conference call and simultaneous webcast
on Monday, March 29, 2004 at 8:30 am Eastern to discuss the contents
of this press release.

    To listen via telephone:
    Dial-in number: +1-888-326-7098 or +1-706-758-2365

    To listen via the Internet:
    Sonus will host a live webcast of the conference call. To access
the webcast, visit the Sonus Networks Investor Relations site at
http://www.sonusnet.com.

    Replay:
    A telephone playback of the call will be available following the
conference and can be accessed by calling +1-402-977-9140 or
+1-800-633-8284. The access code for the replay is 21190372. The
telephone playback will be available through April 12, 2004.

    The webcast will be available on the Sonus Networks Investor
Relations site through March 29, 2005. To access the replay of the
webcast, visit the Investor Relations site at http://www.sonusnet.com.

    About Sonus Networks

    Sonus Networks, Inc. is a leading provider of voice over IP (VoIP)
infrastructure solutions for wireline and wireless service providers.
With its Open Services Architecture(TM) (OSA), Sonus delivers
end-to-end solutions addressing a full range of carrier applications,
including trunking and tandem switching, residential and business
access, network border switching and enhanced services. Sonus' voice
infrastructure solutions, including media gateways, softswitches and
network management systems, are deployed in service provider networks
worldwide. Sonus, founded in 1997, is headquartered in Chelmsford,
Massachusetts. Additional information on Sonus is available at
http://www.sonusnet.com.

    This release may contain projections or other forward-looking
statements regarding future events or the future financial performance
of Sonus that involve risks and uncertainties. Readers are cautioned
that these forward-looking statements are only predictions and may
differ materially from actual future events or results. Readers are
referred to the "Cautionary Statements" section of Sonus' Quarterly
Report on Form 10-Q, dated November 10, 2003 and filed with the SEC,
which identifies important risk factors that could cause actual
results to differ from those contained in the forward-looking
statements. Risk factors include, among others, uncertainties
regarding the Company's ability to complete the audit and file its
Annual Report on Form 10-K/A for 2003 and future periodic reports,
risks as to the SEC's investigation of these or other matters,
unforeseen issues encountered in the completion of the audit,
uncertainties regarding the extent to which prior period financial
statements will be restated, the continued adverse effect of
developments in the telecommunications industry, Sonus' ability to
grow its customer base, dependence on new product offerings, market
acceptance of its products, competition from large incumbent vendors,
rapid technological and market change and manufacturing and sourcing
risks. In addition, any forward-looking statements represent Sonus'
views only as of today and should not be relied upon as representing
Sonus' views as of any subsequent date. While Sonus may elect to
update forward-looking statements at some point, Sonus specifically
disclaims any obligation to do so.

    Sonus is a registered trademark of Sonus Networks. Open Services
Architecture, GSX9000 and Insignus are trademarks of Sonus Networks.
All other trademarks, service marks, registered trademarks, or
registered service marks are the property of their respective owners.

    CONTACT: Sonus Networks, Inc.
             Investor Relations:
             Jocelyn Philbrook, 978-614-8672
             jphilbrook@sonusnet.com
             or
             Media Relations:
             Beth Morrissey, 978-614-8579
             bmorrissey@sonusnet.com


                                                                    Exhibit 99.2

Script for Sonus Networks Conference Call
March 29, 2004


Jocelyn Philbrook, director of investor relations:

Thank you. Good morning everyone. Thank you for joining us today as we discuss
the press release Sonus issued this morning. With me today are Sonus' President
and CEO, Hassan Ahmed and Chief Financial Officer, Steve Nill.

The press release was issued today at 7:30 am Eastern Time on Business Wire and
on First Call. The text of this release also appears on our Web site at
www.sonusnet.com.

Before Hassan offers his opening remarks, I would like to remind you that during
this call, we will make projections or forward-looking statements regarding
items such as future market opportunities and the company's financial
performance. These projections or statements are just predictions and involve
risks and uncertainties such that actual events or financial results may differ
materially from those we have forecasted. As a result, we can make no assurances
that any projections of future events or financial performance will be achieved.
For a discussion of important risk factors that could cause actual events or
financial results to vary from these forward-looking statements, please refer to
the "Cautionary Statements" section of our quarterly report on Form 10-Q dated
November 10th 2003.

Risk factors include, among others, uncertainties regarding the Company's
ability to complete its review and the related audit and file its Annual Report
on Form 10-K/A for 2003 and future periodic reports, risks as to the SEC's
investigation of these or other matters, unforeseen issues encountered in the
completion of the audit, uncertainties regarding the extent to which prior
period financial statements will be restated, the continued adverse effect of
developments in the telecommunications industry, Sonus' ability to grow its
customer base, dependence on new product offerings, market acceptance of its
products, competition from large incumbent vendors, rapid technological and
market change and manufacturing and sourcing risks. In addition, any
forward-looking statements represent Sonus' views only as of today and should
not be relied upon as representing Sonus' views as of any subsequent date. While
Sonus may elect to update forward-looking statements at some point, Sonus
specifically disclaims any obligation to do so.

In addition, because we were unable to give several days' advance notice of this
call, the statements we make on this call are not considered valid public
disclosure for purposes of Regulation FD. To address this, we have filed a Form
8-K with the SEC containing our script for this call. However, because it was
obviously impossible to include in that script the responses to questions asked
on this call, our responses to questions must be limited to information covered
in our prepared remarks. Please bear that in mind if we are unable to address
certain questions you may wish to ask on this call.





I would now like to turn the call over to Hassan.

Hassan Ahmed, president and CEO:

Thanks Jocelyn. Good morning everyone and thank you for joining us today on such
short notice. Today I will provide some comments on the financial review process
that Sonus has undertaken. Then, since it has been a while since our last
conference call, I will provide you with some detail on the progress that we are
making in our business. Following that, Steve will then briefly discuss the
audit with you.

This morning Sonus announced that we have delayed filing our amended 10-K for
fiscal year ended 2003. As we had reported to you previously, Sonus is
conducting a detailed review of its financial statements for 2003 and prior
periods. We have made considerable progress toward completing the review of our
2003 and 2002 financial results and are now considering whether to expand the
review to prior periods.

Sonus strives to achieve the highest level of integrity and transparency, in
both our business operations and financial reporting. As we reported to you
previously, we are engaged in a detailed review of the timing of revenue
recognized from customer transactions and of other financial statement accounts.
All of the revenue that Sonus had previously reported to you was the result of
good business, meaning that the products had been shipped to our customers and
we have either received payment or are receiving payment for the products in the
ordinary course. We are deeply disappointed that during our year-end audit in
January, senior management and our auditors discovered that certain employees
had engaged in behavior that violated our code of conduct and potentially
compromised the integrity of our financial reporting. We therefore felt it was
necessary and appropriate to launch a comprehensive financial investigation.

We consider this a very serious matter and have responded with aggressive
measures to address the issue. Sonus expanded the year-end financial review to
cover not only 2003, but also prior periods. Sonus' audit committee launched an
independent investigation to determine the extent of the behavior. Finally,
Sonus proactively notified the Securities and Exchange Commission of the
investigation and we have been providing them with the results of our
investigation.

Since we last updated you, Sonus has been thoroughly reviewing the financial
results we reported during 2002 and 2003. We are now considering whether to
expand the review to include the results from additional prior periods. Ernst
and Young was not our auditor for periods prior to 2002, and therefore, if we
determine that it is appropriate to review prior periods, the review and
accompanying audit could take some time.

I want to be clear that the delay in filing our results does not detract from
the progress we have made in our business. Sonus has accomplished a lot over the
last year, and continues to do so in 2004. While it could be easy to let the
recent financial review overshadow our achievements, I want to remind you that
this has not impacted the fundamentals of our business. Sonus has a strong
competitive position in a market that is





now beginning to reach mainstream adoption.  We are pleased with the progress in
our business to date and our start to 2004. Now let's get into some details.

In the fourth quarter, Sonus made important progress with its customers. For
example, two of our largest customers, Verizon and Qwest, continued to roll out
their Sonus-based networks.

In July last year, we announced that Verizon had chosen Sonus to deploy a
long-distance packet voice network in select cities. I'm sure you saw their
announcement about accelerating the build out of their packet switched network.
Over the past several quarters, Sonus and Verizon have built a successful
long-distance network. Sonus expects to continue to support and expand those
deployments. Down the road, we anticipate there will be a number of voice over
IP opportunities at Verizon, which we'll be aggressively pursuing.

For Qwest, 2003 marks the third year of substantial expansion of their
next-generation network and Qwest has one of the larger installed bases of Sonus
equipment. We continue to work with Qwest as they grow their packet voice
network and expand these technologies into new applications.

In the fourth quarter, we announced that America Online is deploying a Sonus
solution to offer premium services to their customers. AOL has grown their
membership to over 35 million around the world and is known to many as a pioneer
in new feature development for their users. Today, AOL offers their customers
Internet call alert, email by phone and voicemail over their computers, all
enabled by a packet voice infrastructure from Sonus.

Carrier deployment of packet voice solutions is accelerating, and monthly
traffic volumes on Sonus-based networks have continued to ramp steadily from the
5 billion minutes per month we reported in Q3 to over 6.5 billion minutes per
month today. This is an important validation of the scalability, reliability and
quality of our solutions.

In Q4, Sonus delivered Release 5.1 of its industry-leading software, once again
furthering our technology leadership with major new features and functionality
that extend the applications of our solutions. Specifically, Sonus' new Network
Border Switching capabilities address carriers' growing requirements for
security, session control and address translation between IP networks, and
facilitate the development of the ubiquitous all-IP network. As packet voice
networks continue to proliferate, service providers are moving to connect to
each other using IP, rather than circuits. This trend is opening up new
opportunities for carriers in a number of key areas including packet peering,
enterprise access, end user access, and application service provider access.
Sonus' new network border switch enables carriers to address each of these
opportunities with an advanced carrier grade solution.

Looking back, 2003 was an important year for Sonus. We strengthened our company
in many of the dimensions we need to build a large business. We successfully
broadened our customer base, including announcing relationships with AT&T,
Verizon, America





Online and IDT. We made important additions to our product line, introducing new
capabilities  and features  that widened our  addressable  market to include the
wireless  operators  and  network  border  switching.  Major  software  releases
introduced last year provided  enhancements in a number of key areas,  expanding
our voice VPN features, broadening our international capabilities with a new set
of international  signaling  variants,  and delivering  traffic control features
that enable network performance optimization.

Taking a wider view, 2003 will be remembered as the year that voice over IP
became a mainstream technology. It is hard to pick up a newspaper or industry
report without some mention of voice over IP. More importantly, some of the
largest carriers in the world have announced plans to offer VoIP services. At
Sonus, our mission from the start has been to develop carrier class VoIP
solutions. Driven in large part from the success of networks built on Sonus,
carriers recognize that voice over IP technologies can deliver the same quality
of service as their TDM networks, while harnessing the powerful service delivery
platform of a converged IP network. This, combined with continued changes in the
regulatory environment, is driving a lot of new competitive activity among the
carriers.

Unlike the last major shift in switching technologies from analog to digital in
the 1970s, voice over IP is much more than simply the next technology platform.
By separating services and applications from transport, VoIP enables carriers to
deliver broadband services to customers without having to own connectivity to
the customer. This has the potential to change the structure of the industry and
the players, redefining the winners and losers. So it is clear that packet voice
technologies will play an important role in helping to shape the industry.

Looking ahead, 2004 is stacking up to be an incredibly exciting year for our
industry and our company. Sonus' mission is clear: further expand our market
presence, keep building our technology lead, extend our international reach, and
accomplish all this within the context of a business that is financially strong.

We are making important progress towards these goals. Sonus recently announced
its first OEM relationship with a global leader in the wireless market,
Motorola. Motorola has integrated Sonus' industry-leading GSX9000 media gateway
with the Motorola SoftSwitch, a next-generation switching platform for wireless
carriers around the globe. Through this relationship with Motorola, Sonus is now
able to offer a proven solution for the access portion of wireless carriers'
networks, complementing Sonus' SMARRT Wireless solution for the core and
effectively doubling our addressable market.

Additionally, Sonus recently announced that one of Japan's largest broadband
communication carriers, Softbank Broadband, is deploying Sonus infrastructure as
part of a multi-million dollar contract to build out a new packet-based,
next-generation voice network. SBB was awarded approximately 6 million of 9
million new IP-based telephone numbers to be issued in Japan, and is expanding
its network to accommodate the continued growth in subscribers. SBB is deploying
Sonus' voice solutions to provide





long distance  voice  services first for  residential  subscribers  and then for
enterprise customers in later deployment phases.

By now it is obvious that carriers throughout the world will adopt voice over
packet technologies. Sonus has announced positions with 32 carriers and we are
just getting started. We are growing our sales force and investing in marketing
to drive our solutions into large networks around the globe. Our trial base
continues to be strong and is diverse across carrier type and application,
including long distance, local, wireline and wireless operators.

In summary, this is an exciting time for our business. We are at the beginning
of a long-term and fundamental opportunity for Sonus. The industry has moved to
the next phase of the market in which incumbent carriers are beginning to adopt
and deploy packet voice solutions. We entered 2004 with confidence. Sonus has
winning technologies and a talented team, combined with an unwavering focus on
building one of the premier suppliers in next-generation voice.

With that, I would now like to turn the call over to Steve.

 Steve Nill, vice president of finance and administration and CFO:

Thanks Hassan. I'd like to briefly comment on our review of the financial
results. As the head of the finance organization, I am personally deeply
disappointed with our current situation, and the impact that it has had on our
company and our shareholders. For those of you who know Sonus, the integrity of
our financials is paramount. And at Sonus, we hold ourselves to the highest
standards of legal, ethical and honorable behavior. When we discovered the
issues we're currently dealing with, we immediately began taking the appropriate
and necessary steps to address them.

Over the last few months, we have put a great deal of effort into completing the
expanded review and accompanying audit. During this process we have been
thoroughly reviewing the 2002 and 2003 financial results previously reported to
you. It is unfortunate that we were unable to file our amended Annual Report for
2003 within the 15-day grace period; however, we have made considerable progress
towards completing the review of 2003 and 2002.

As part of completing  our review,  we are assessing the need to expand the
review to prior periods. Our independent  auditor,  Ernst and Young, was not our
auditor of record for periods  prior to 2002.  So, if it is  determined  that we
need to expand our review into periods prior to 2002,  completing the review and
the accompanying audit could take some time.

Based on the information we have today, we expect to restate our historical
financial results for fiscal year 2002 and for the first three quarters of
fiscal year 2003. It is important to remember that all of the revenue we
previously reported is the result of products that have been delivered to our
customers and we have either received payment or are receiving payment for the
products in the ordinary course. So while revenue is expected to





shift between periods or move between revenue and deferred revenue,  the overall
strength of our business remains unchanged. We ended the fiscal year 2003 with
in excess of $300 million in cash, cash equivalents and marketable securities.

To begin to  restore  investor  confidence,  we need to get our  results on
file. We are investing substantial time and resources to complete this financial
review as quickly as  possible.  However,  we do expect to receive  notification
from the Nasdaq that we are not in compliance with their filing requirements and
that we could be subject to delisting  from Nasdaq.  The Nasdaq could change our
trading symbol to "SONSE." We will have seven days to request a hearing with the
Nasdaq once we receive such notification.  If the Nasdaq grants a hearing, it is
usually scheduled within 2 to 3 weeks. There is no assurance that the panel will
grant our request for continued listing.

One last subject I'd like to cover is the shareholder lawsuits that have been
filed against our company in recent weeks. We believe that the company has
substantial legal and factual defenses, which we intend to pursue vigorously.

As you can imagine, at this time we are not able to provide you with additional
details on the audit or our restatements beyond what we've already told you.
But, if you have questions related to other aspects of our business, we've made
time for a few of them.

I'll turn the call over to the operator for questions.