<SEC-DOCUMENT>0001104659-23-033352.txt : 20230316
<SEC-HEADER>0001104659-23-033352.hdr.sgml : 20230316
<ACCEPTANCE-DATETIME>20230316164510
ACCESSION NUMBER:		0001104659-23-033352
CONFORMED SUBMISSION TYPE:	NT 10-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20221231
FILED AS OF DATE:		20230316
DATE AS OF CHANGE:		20230316
EFFECTIVENESS DATE:		20230316

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ribbon Communications Inc.
		CENTRAL INDEX KEY:			0001708055
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				821669692
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		NT 10-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38267
		FILM NUMBER:		23739465

	BUSINESS ADDRESS:	
		STREET 1:		6500 CHASE OAKS BOULEVARD
		CITY:			PLANO
		STATE:			TX
		ZIP:			75023
		BUSINESS PHONE:		877-412-8867

	MAIL ADDRESS:	
		STREET 1:		6500 CHASE OAKS BOULEVARD
		CITY:			PLANO
		STATE:			TX
		ZIP:			75023

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Sonus Networks, Inc.
		DATE OF NAME CHANGE:	20171027

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Solstice Sapphire Investments, Inc.
		DATE OF NAME CHANGE:	20170531
</SEC-HEADER>
<DOCUMENT>
<TYPE>NT 10-K
<SEQUENCE>1
<FILENAME>tm239754d1_nt10k.htm
<DESCRIPTION>NT 10-K
<TEXT>
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>Commission File Number: 001-38267</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>CUSIP Number: 762544104</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>WASHINGTON, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="border-top: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM&nbsp;12b-25</B></P>

<P STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>NOTIFICATION OF LATE FILING</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; font-size: 10pt; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Check One): </FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#120;</FONT> Form&nbsp;10-K
<FONT STYLE="font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT> Form&nbsp;20-F <FONT STYLE="font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Wingdings">&#168;</FONT>
</FONT>Form&nbsp;11-K <FONT STYLE="font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT> Form&nbsp;10-Q</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Form&nbsp;10-D
<FONT STYLE="font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT> Form&nbsp;N-CEN <FONT STYLE="font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Wingdings">&#168;</FONT>
</FONT>Form&nbsp;N-CSR</P></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>For Period Ended: December&nbsp;31, 2022</B></FONT></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Transition Report on Form&nbsp;10-K</TD></TR>
  <TR>
    <TD><FONT STYLE="font-size: 5pt">&nbsp;</FONT></TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 5pt">&nbsp;</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Transition Report on Form&nbsp;20-F</TD></TR>
  <TR>
    <TD><FONT STYLE="font-size: 5pt">&nbsp;</FONT></TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 5pt">&nbsp;</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Transition Report on Form&nbsp;11-K</TD></TR>
  <TR>
    <TD><FONT STYLE="font-size: 5pt">&nbsp;</FONT></TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 5pt">&nbsp;</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Transition Report on Form&nbsp;10-Q</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">For the Transition Period Ended: </FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-left: black 1pt solid; padding-left: 8.4pt; font-size: 10pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 2.4pt; padding-left: 8.4pt">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>Read Instruction (on back page) Before Preparing
    Form. Please Print or Type.</I></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Nothing in this form shall be construed to imply
    that the Commission has verified any information contained herein.</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">If the notification relates to a portion of the filing checked above,
identify the Item(s)&nbsp;to which the notification relates:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART&nbsp;I-REGISTRANT INFORMATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 22pt"><B>Ribbon Communications
Inc.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Full Name of Registrant</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Former Name if Applicable</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>6500 Chase Oaks Boulevard, Suite&nbsp;100</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Address of Principal Executive Office (Street
and number)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Plano, Texas 75023</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>City, State and Zip Code</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART&nbsp;II-RULES 12b-25 (b)&nbsp;AND (c)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">If the subject report could not be filed without unreasonable effort
or expense and the registrant seeks relief pursuant to Rule&nbsp;12b-25(b), the following should be completed. (Check box if appropriate)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD ROWSPAN="3" STYLE="border-right: black 1pt solid; padding-left: 8.25pt; font-size: 10pt"><FONT STYLE="font-family: Wingdings">&#120;</FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(a)</FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The reasons described in reasonable detail in Part&nbsp;III of this form could not be eliminated without unreasonable effort or expense;</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(b)</FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The subject annual report, semi-annual report, transition report on Form&nbsp;10-K, Form&nbsp;20-F, Form&nbsp;11-K, FORM&nbsp;N-CEN or Form&nbsp;N- CSR, or portion thereof will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form&nbsp;10-Q, or subject distribution report on Form&nbsp;10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(c)</FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The accountant&rsquo;s statement or other exhibit required by Rule&nbsp;12b-25(c)&nbsp;has been attached if applicable.</FONT></TD></TR>
  </TABLE>
<P STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART&nbsp;III - NARRATIVE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">State below in reasonable detail why Form&nbsp;10-K, 20-F, 11-K, 10-Q,
10-D, N-CEN, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">As of December&nbsp;31, 2022, Ribbon Communications Inc. (the &ldquo;Company&rdquo;)
was in compliance with all covenants under its Senior Secured Credit Facilities Credit Agreement, as amended (the &ldquo;2020 Credit
Facility&rdquo;), which the Company entered into on March&nbsp;3, 2020. The Company is presently engaged in discussions with the lenders
under the 2020 Credit Facility, regarding a new amendment to the 2020 Credit Facility to, among other things, increase the total net
leverage ratio and decrease the minimum fixed charge coverage ratio included as covenants under the 2020 Credit Facility, for certain
periods ending on or after March&nbsp;31, 2023. The amendment, if completed, together with a pay down of a portion of the debt outstanding
under the 2020 Credit Facility that would be required by the amendment, is expected to provide the Company with additional financial
flexibility for 2023 as the Company targets continued improved profitability. The amendment will require material updates to the Company&rsquo;s
disclosures in its Annual Report on Form&nbsp;10-K (the &ldquo;Form&nbsp;10-K&rdquo;) for the year ended December&nbsp;31, 2022. The
Company's management team is working  diligently on obtaining the amendment and therefore cannot complete the procedures necessary
for filing the Form&nbsp;10-K without unreasonable effort and expense. The Company currently anticipates obtaining such amendment and
filing the Form&nbsp;10-K within the time period proscribed in Rule&nbsp;12b-25 promulgated under the Securities Exchange Act of 1934,
as amended (or by March&nbsp;31, 2023). Completion of the amendment requires, among other things, the consent of the lenders holding
a majority of the principal amount outstanding under the 2020 Credit Facility.</P>

<P STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART&nbsp;IV - OTHER INFORMATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD COLSPAN="9" STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Name and telephone number of person to contact in regard to this notification.</FONT></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Patrick W. Macken</FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(978)</FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">614-8170</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(Name)</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(Area Code)</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(Telephone Number)</B></FONT></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD COLSPAN="9">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD COLSPAN="9" STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Have
all other periodic reports required under Section&nbsp;13 or 15(d)&nbsp;of the Securities Exchange Act of 1934 or Section&nbsp;30 of
the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file
such report(s)&nbsp;been filed? If the answer is no, identify report(s). </FONT><FONT STYLE="font-family: Wingdings">&#120;</FONT> Yes
<FONT STYLE="font-family: Wingdings">&#168;</FONT> No</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD COLSPAN="9">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD COLSPAN="9" STYLE="vertical-align: bottom; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? </FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&#9746;</FONT> Yes <FONT STYLE="font-family: Times New Roman, Times, Serif">&#9744;</FONT>&nbsp;&nbsp;No</TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">If so, attach an explanation of the anticipated change, both narratively
and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
February&nbsp;15, 2023, the </FONT>Company furnished a Current Report on Form&nbsp;8-K with the Securities and Exchange Commission that
included a press release including unaudited financial statements for the Company&rsquo;s fourth quarter and year ended December&nbsp;31,
2022 and reporting a loss from operations of $48.3 million for its year ended December&nbsp;31, 2022 and $117.8 million for its year ended
December&nbsp;31, 2021. The press release also reported a net loss of $98.1 million for the Company&rsquo;s year ended December&nbsp;31,
2022 and $177.2 million for its year ended December&nbsp;31, 2021. The Company does not expect any material changes to the financial results
reported in the press release.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B><I>Cautionary Note Regarding
Forward-Looking Statements</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">This Notification of Late Filing
on Form&nbsp;12b-25 contains &ldquo;forward-looking statements&rdquo; within the meaning of Section&nbsp;27A of the Securities Act of
1933, as amended, and Section&nbsp;21E of the Securities Exchange Act of 1934, as amended. Words such as &ldquo;expect,&rdquo; &ldquo;will,&rdquo;
 &ldquo;anticipates,&rdquo; &ldquo;estimates&rdquo; and variations of such words and similar future or conditional expressions are intended
to identify forward-looking statements. These forward-looking statements include, but are not limited to, statements related to our expectations
regarding our financial results and results of operations for the quarter and year ended December&nbsp;31, 2022, and our beliefs and expectations
regarding the amendment to the 2020 Credit Facility and the pay down of a portion of the debt outstanding under the 2020 Credit Facility,
the timing of the completion of the amendment to the 2020 Credit Facility and the timing of filing of the Form&nbsp;10-K, all of which
reflect the Company&rsquo;s expectations based upon currently available information and data. Because such statements are based on the
Company&rsquo;s current expectations and are not statements of fact, actual results may differ materially from those projected or estimated
and you are cautioned not to place undue reliance on these forward-looking statements. These forward-looking statements are not guarantees
of future performance, conditions or results, and involve a number of known and unknown risks, uncertainties, assumptions and other important
factors, many of which are outside the Company's control, that could cause actual results or outcomes to differ materially from those
discussed in the forward-looking statements. Additional information regarding these and other factors can be found in the Company&rsquo;s
reports filed with the Securities and Exchange Commission, including, without limitation, its Annual Report on Form&nbsp;10-K for the
year ended December&nbsp;31, 2021. The Company disclaims and does not undertake any obligation to update or revise any forward-looking
statement in this report, except as required by applicable law or regulation.</P>

<P STYLE="border-bottom: black 0.75pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Ribbon Communications Inc.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Name of Registrant as Specified in Charter)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">has caused this notification to be signed on its behalf by the undersigned
hereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
<TD STYLE="vertical-align: top; font-size: 10pt; width: 51%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Date: March&nbsp;16, 2023</FONT></TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt; width: 1%">&nbsp;</TD>
<TD STYLE="vertical-align: top; font-size: 10pt; width: 4%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">By:</FONT></TD>
<TD STYLE="border-bottom: Black 1pt solid; vertical-align: top; width: 44%">/s/ Patrick Macken</TD></TR>
<TR>
<TD STYLE="vertical-align: top">&nbsp;</TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
<TD STYLE="vertical-align: top">&nbsp;</TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Patrick W. Macken</FONT></TD></TR>
<TR>
<TD STYLE="vertical-align: top">&nbsp;</TD>
<TD STYLE="vertical-align: bottom; font-size: 10pt">&nbsp;</TD>
<TD STYLE="vertical-align: top">&nbsp;</TD>
<TD STYLE="vertical-align: top; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Executive Vice President, Chief Legal Officer and Secretary</FONT></TD></TR>
</TABLE>

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