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




                              AMENDMENT NUMBER THREE TO
                             LOAN AND SECURITY AGREEMENT


                                    BY AND BETWEEN


                     COMMUNICATION TELESYSTEMS INTERNATIONAL DBA
                             WORLDXCHANGE COMMUNICATIONS

                               WXL COMMUNICATIONS, LTD.

                                 CTS TELECOM, INC.

                                        AND

                             FOOTHILL CAPITAL CORPORATION


                              DATED AS OF APRIL 27, 1998



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                              AMENDMENT NUMBER THREE TO
                             LOAN AND SECURITY AGREEMENT
                             ---------------------------


     THIS AMENDMENT NUMBER THREE TO LOAN AND SECURITY AGREEMENT (THIS
"AMENDMENT"), is entered into as of April 27, 1998, between FOOTHILL CAPITAL
CORPORATION, a California corporation ("Foothill"), with a place of business
located at 11111 Santa Monica Boulevard, Suite 1500, Los Angeles, California
90025-3333, and COMMUNICATION TELESYSTEMS INTERNATIONAL, dba WORLDxCHANGE
Communications, a California corporation ("WXCC"), with its chief executive
office located at 9999 Willow Creek Road, San Diego, California 92131, WXL
COMMUNICATIONS, LTD., a Canadian corporation ("WXLC"), with its chief executive
office located at 9999 Willow Creek Road, San Diego, California 92131, and CTS
TELCOM, INC., a Florida corporation ("CTST"), with its chief executive office
located at 9999 Willow Creek Road, San Diego, California 92131 (WXCC, WXLC, and
CTST, and each of them, and any one or more of them, jointly and severally,
individually and collectively, "Borrower").

This Amendment is entered into with reference to the following facts:

     A.   WHEREAS, Foothill, as lender, and Borrower are parties to that certain
          Loan and Security Agreement, dated as of March 11, 1997, (as from time
          to time amended, modified, supplemented, renewed, extended, or
          restated, including, without limitation, by this Amendment Number
          Three and by the prior amendments to the aforesaid loan agreement
          specifically referred to below, the "Loan Agreement");

     B.   WHEREAS, Foothill, as lender, and Borrower are parties to that certain
          Amendment Number One to Loan and Security Agreement, dated as of
          December 31, 1997, amending the Loan Agreement as therein provided;

     C.   WHEREAS, Foothill, as lender, and Borrower are parties to that certain
          Amendment No. Two to the Loan and Security Agreement, dated as of
          February 20, 1998, amending the Loan Agreement as therein provided;

     D.   WHEREAS, Borrower has requested Foothill to amend the Loan Agreement
          as set forth in this Amendment, and Borrower has requested Foothill to
          waive certain Defaults and Events of Default under the Loan Agreement
          as set forth in this Amendment;

     E.   WHEREAS, Foothill is willing to (i) so amend the Loan Agreement in
          accordance with the terms and conditions hereof and (ii) to waive
          certain Defaults and Events of Default under the Loan Agreement as set
          forth herein.

                                         -1-



     NOW, THEREFORE, in consideration of the above recitals and the mutual
promises contained herein, Foothill and Borrower hereby agree as follows:

     1.   INITIALLY CAPITALIZED TERMS.

     All capitalized terms used herein and not defined herein shall have the
meanings ascribed to them in the Loan Agreement, as amended hereby.

     2.   AMENDMENTS TO THE LOAN AGREEMENT.

          a.   SECTION 1.1 of the Loan Agreement is hereby amended by adding the
following definitions in alphabetical order:

          "ADJUSTED CONSOLIDATED NET WORTH" means consolidated net worth
     determined in accordance with GAAP of Borrower and its Subsidiaries (but
     excluding from such calculation (a) the non-cash portion of any foreign
     currency translation adjustments reflected on the balance sheet of Borrower
     or any of its Subsidiaries in accordance with the Financial Accounting
     Standards Board, Statement of Financial Accounting Standards, Number 52,
     (b) the reclassification contemplated by a recession offering for some or
     all of the outstanding shares of the capital stock of WXCC or its
     subsidiaries in an amount not to exceed $2,500,000 in the aggregate, and
     (c) the net worth of CTST and any Subsidiaries of CTST).

          "GUARANTY REAFFIRMATION AND CONSENTS" means those certain guaranty
     reaffirmations and consents, dated as of August 27, 1998, between Foothill
     and the Guarantors.

          "OFFERING" shall mean Borrower's incurrence of Indebtedness currently
     anticipated to be $150,000,000 or more under the offering of public debt
     securities of Borrower through Jeffries and Company, Inc. or Morgan Stanley
     Dean Witter, or such other investment bankers as are reasonably acceptable
     to Foothill.

          "SECOND AMENDMENT" means that certain Amendment No. Two to the Loan
     and Security Agreement, dated as of February 20, 1998, between Foothill and
     Borrower.

          "SPECIFIED CARRIERS" means Mercury Telecommunications, British Telcom,
     and Unisource.

          "THIRD AMENDMENT" means that certain Amendment Number Three to Loan
     and Security Agreement, dated as of April 27, 1998, between Foothill and
     Borrower.

                                         -2-




          b.   The following definitions contained in SECTION 1.1 of the Loan
Agreement hereby are deleted in their entirety and the following are hereby
substituted in lieu thereof:

          "BASE PERMITTED CAPITAL EXPENDITURE AMOUNT" means (a) actual cash
     capital expenditures incurred for Borrower's fiscal year ending September
     30, 1997, of $18,502,000, and (b) with respect to any fiscal year of
     Borrower after fiscal year 1997, 120% of the Base Permitted Capital
     Expenditure Amount for the immediately preceding fiscal year of Borrower.

          "LOAN DOCUMENTS" means this Agreement, the First Amendment, the Second
     Amendment, the Third Amendment, the Canadian Security Agreements, the
     Pledge Agreements, the Disbursement Letter, the Guarantees, the Guaranty
     Reaffirmation and Consents, the Lockbox Agreements, any Mortgages hereafter
     delivered by Borrower to Foothill, the Suretyship Agreement, any note or
     notes executed by Borrower and payable to Foothill, and any other
     agreement entered into, now or in the future, in connection with this
     Agreement.

          "SPECIFIED AMOUNT" means, (a) with respect to Borrower's fiscal
     quarter ending March 31, 1998, negative fifty six million dollars
     (-$56,000,000), PLUS any applicable amount provided for in the next
     sentence of this definition, (b) with respect to Borrower's fiscal quarter
     ending June 30, 1998, negative fifty six million five hundred thousand
     dollars (-$56,500,000), PLUS any applicable amount provided for in the next
     sentence of this definition, (c) with respect to Borrower's fiscal quarter
     ending September 30, 1998, negative fifty six million dollars
     (-$56,000,000), PLUS any applicable amount provided for in the next
     sentence of this definition, and (d) with respect to each fiscal quarter of
     Borrower occurring thereafter, an amount equal to negative fifty six
     million dollars (-$56,000,000), PLUS two million dollars ($2,000,000) for
     each such fiscal quarter occurring after September 30, 1998, PLUS any
     applicable amount provided for in the next sentence of this definition.  As
     of any date of determination of the Specified Amount, if Borrower has
     concluded one or more public or private equity offerings after the Closing
     Date and on or before such date of determination, the Specified Amount
     shall be increased by fifty percent (50%) of the aggregate net cash
     proceeds raised by Borrower after the Closing Date with respect to all such
     public or private equity offerings.

          c.   SECTION 3.8 of the Loan Agreement hereby is amended by adding the
following sentence immediately following the last sentence thereof:

          "Anything contained in the foregoing to the contrary notwithstanding,
     Borrower shall not be required to provide any prior notice to Foothill in
     connection with the termination of this Agreement and the payment in cash
     of the Obligations,

                                         -3-



     in full on or before June 30, 1998 from the proceeds of the Offering;
     PROVIDED, HOWEVER, that (i) in connection with the foregoing, Borrower
     shall pay to Foothill an amount equal to the aggregate amount of all
     interest fees otherwise payable to Foothill on the average Daily Balance of
     Advances that were outstanding during the 30 day period immediately
     preceding any such termination of the Agreement and repayment of the
     Obligations, and (ii) nothing in the foregoing shall relive Borrower of its
     obligations under this SECTION 3.6 to pay to any applicable Early
     Termination Premium in connection with any such termination of the
     Agreement and repayment of the Obligations.

          d.   SECTION 6.11 of the Loan Agreement hereby is deleted in its
entirety and the following is hereby substituted in lieu thereof:

          "6.11 FINANCIAL COVENANT.  Maintain Adjusted Consolidated Net Worth of
     not less than the Specified Amount, measured on a fiscal quarter-end
     basis."

          e.   SECTION 6.17 of the Loan Agreement hereby is amended by adding
the following sentence immediately following the last sentence thereof:

          "Anything contained in the foregoing to the contrary notwithstanding,
     Borrower shall not be required to comply with the provisions of the first
     sentence of this SECTION 6.17 with respect to its obligations to make
     payments to a Specified Carrier to the extent that, on or before June 30,
     1998, Borrower has entered into a written payment plan, satisfactory to
     Foothill, setting forth the Borrower's agreement with such Specified
     Carrier to bring Borrower back in compliance with the terms and conditions
     of its contractual agreements with such Specified Carrier, and Borrower
     shall be performing its obligations in accordance with such plan."

     3.   WAIVERS OF CERTAIN TERMS AND CONDITIONS UNDER THE LOAN AGREEMENT.
Subject to the terms and conditions set forth below, Foothill hereby agrees to
waive each of the following Defaults or Events of Default arising prior to the
date hereof under the Loan Agreement:

          a.   Borrower's violation of the requirement set forth in SECTION
6.2(c) of the Loan Agreement which provides, INTER ALIA, that Borrower shall
provide Foothill, on a monthly basis and, in any event, by no later than the
twentieth (20th) day of each month during the term of this Agreement, with a
report of any book overdraft in existence in connection with Borrower's accounts
payable, hereby is waived in its entirety through the date hereof; PROVIDED,
HOWEVER, that nothing in the foregoing shall relive Borrower of its other
reporting obligations to Foothill under SECTION 6.2 during any applicable
period.

                                         -4-



          b.   Borrower's violation of the requirements set forth (i) in
SECTION 6.3(a) of the Loan Agreement which provides that Borrower shall deliver
to Foothill, within forty-five (45) days after the end of each month during each
of WXCC and WXLC's fiscal years, an internally-prepared balance sheet, an
internally-prepared income statement, and (if and only if available) an
internally-prepared cash flow statement covering WXCC and WXLC's consolidated
operations during such period, together with a report estimating the aggregate
amount, as of the end of such month, of all Telecommunication Taxes payable by
WXCC and WXLC in respect of their business activities in the State of Texas or
any other state where Foothill determines pursuant to SECTION 2.1 that a
Telecommunication Tax Reserve is necessary, and (ii) in SECTION 6.3(b) of the
Loan Agreement which provides that Borrower shall deliver to Foothill, as soon
as available, but in any event within one hundred fifty (150) days after the end
of each of WXCC and WXLC's fiscal years, consolidated financial statements of
WXCC and WXLC for each such fiscal year, audited by independent certified public
accountants reasonably acceptable to Foothill and certified, without any
qualifications, by such accountants to have been prepared in accordance with
GAAP, together with a certificate of such accountants addressed to Foothill
stating that such accountants do not have knowledge of the existence of any
Default of Event of Default then continuing, hereby are waived in their entirety
of any Default or Event of Default then continuing, hereby are waived in their
entirety through May 31, 1998; PROVIDED, HOWEVER, that nothing in the foregoing
shall relive Borrower of its other reporting obligations to Foothill under
SECTION 6.3 during this period.

          c.   Borrower's violations of the requirements set forth in
SECTION 6.9 of the Loan Agreement which provide, INTER ALIA, that Borrower
shall pay all assessments and taxes, whether real, personal, or otherwise,
due or payable by, or imposed, levied, or assessed against Borrower or any of
its property, in full before delinquency or before the expiration of any
extension period therefor, hereby are waived in their entirety through
June 30, 1998.

          d.   Borrower's violations of the requirements set forth in
SECTION 6.11 of the Loan Agreement which provide, INTER ALIA, that Borrower
shall maintain a consolidated net worth determined in accordance with GAAP of
Borrower and its Subsidiaries (but excluding CTST and any Subsidiaries of
CTST from such calculation) of not less than < $17,000,000 > for Borrower's
fiscal year ending September 30, 1997, and of not less than < $9,000,000 >
for each fiscal quarter thereafter as a result of Borrower's actual
consolidated net worth for Borrower's fiscal year ended September 30, 1997 of
< $52,916,000 > and Borrower's actual consolidated net worth for Borrower's
fiscal quarter ended December 31, 1997 of < $54,992,000 > hereby are waived
in their entirety for these measuring periods.

          e.   Borrower's violations of the requirements set forth in
SECTION 6.16 of the Loan Agreement which provide that Borrower shall pay, not
later than the earlier of (a) the sixtieth (60th) day after the date when first
due, or (b) the last day prior

                                         -5-



to the date when failure to pay same would create a material default that would
entitle the obligee with respect thereto to take enforcement action against
Borrower, all rents and other amounts payable under any leases to which Borrower
is a party or by which Borrower's properties and assets are bound, unless such
payments are the subject of a Permitted Protest, hereby are waived in their
entirety through the date hereof.

               f.   Borrower's violations of the requirements set forth in
SECTION 6.17 of the Loan Agreement which provide, INTER ALIA, that Borrower
shall make all payments due from it to Carriers within ninety (90) days of their
due date, and otherwise comply in all material respects with Borrower's
non-monetary contractual obligations to Carriers as a result of Borrower's
failure to make all such payments due from it to its Carriers within the
specified period hereby are waived in their entirety through June 30, 1998.

               g.   Foothill hereby agrees to waive Borrower's compliance with
the provisions of SECTION 7.1(e) which require that additional unsecured
Indebtedness be subject to subordination agreements reasonable satisfactory to
Foothill, such satisfaction to require a determination that Borrower's cash flow
projections are sufficient in Foothill's reasonable judgment to support the
projected interest, principal and other payment obligations required under the
additional unsecured Indebtedness, in connection with Borrower's incurrence of
Indebtedness in the amount of $10,000,000 (the "TEL-SAVE INDEBTEDNESS") from
Tel-Save Holdings, Inc., a Delaware corporation ("Tel-Save"), with its principal
place of business at 6805 Route 202, New Hope, Pennsylvania, to be repaid in
accordance with the terms and conditions of that certain Subordinated Promissory
Note dated March 27, 1998, a copy of which is attached hereto as EXHIBIT "A" and
incorporated hereby by this reference (the "Subordinated Note").

               h.   Foothill hereby agrees to waive Borrower's compliance with
the provisions of SECTION 7.1(e) which require that additional unsecured
indebtedness be subject to subordination agreements reasonable satisfactory to
Foothill, such satisfaction to require a determination that Borrower's cash flow
projections are sufficient in Foothill's reasonable judgment to support the
projected interest, principal and other payment obligations required under the
additional unsecured Indebtedness, in connection with Borrower's incurrence of
Indebtedness in an aggregate amount anticipated to be $150,000,000 or more under
the offering of public debt securities of Borrower through Jeffries and Company,
Inc. and/or Morgan Stanley Dean Witter, or such other investment bankers as are
acceptable to Foothill (the "Permitted Offering Indebtedness").

               i.   Foothill hereby agrees to waive Borrower's violations of the
provisions of SECTION 7.2 of the Loan Agreement as a result of any liens arising
for unpaid taxes with respect to which Borrower is in breach of its covenants
set forth in SECTION 6.9 of the Loan Agreement, through June 30, 1998.

                                         -6-



               j.   Foothill hereby agrees to waive Borrower's compliance
with the provisions of SECTION 7.8 of the Loan Agreement which provides,
INTER ALIA, that Borrower shall not prepay any Indebtedness owing to any
third person to the extent necessary (i) to permit WCXC to prepay
Indebtedness in an aggregate amount not to exceed $500,000 payable to CTST on
or before June 30, 1998, and (ii) to permit CTST to prepay Indebtedness in an
aggregate amount not to exceed $500,000 payable to the Principals on or
before June 30, 1998.

               k.   Borrower's violation of the negative covenant set forth in
SECTION 7.10 of the Loan Agreement which provides, INTER ALIA, that Borrower
shall not make any capital expenditures in excess of $12,000,000 during
Borrower's fiscal year ending September 30, 1997 as a result of Borrower's
making capital expenditures during Borrower's fiscal year ending September 30,
1997 in the amount of $18,502,000 hereby is waived in its entirety.

               l.   Borrower's violation of the negative covenant set forth in
SECTION 7.13 of the Loan Agreement which provides, INTER ALIA, that Borrower
shall not modify or change, in any material respect, its method of accounting
(except as required by GAAP) as a result of Borrower's adoption of voluntary
adjustments, including a change in accounting for direct response advertising
for Borrower's fiscal year ended September 30, 1997 and for each period ending
thereafter, including any accounting adjustments made as a result thereof,
hereby is waived in to the extent necessary to permit Borrower's adoption of
voluntary adjustments, including a change in accounting for direct response
advertising for Borrower's fiscal year ended September 30, 1997 and all
subsequent periods; and to make all necessary accounting adjustments in
connection therewith.

               m.   Borrower's violations of the negative covenant set forth
in SECTION 7.14 of the Loan Agreement which provides, INTER ALIA, that
Borrower shall not create and invest in new foreign Subsidiaries, unless WXCC
(or a Subsidiary of WXCC) pledges at least 66 2/3% of the capital stock of
such new foreign Subsidiary to Foothill pursuant to a written pledge
agreement in form and substance reasonably satisfactory to Foothill at the
time such capital stock first is issued as a result of Borrower's failure to
deliver to Foothill the requisite shares of capital stock those certain newly
created foreign Subsidiaries set forth on SCHEDULE 1 to this Amendment at the
time that such foreign Subsidiaries were created hereby are `waived in their
entirety through June 30, 1998.

          4.   FOOTHILL CONSENTS.

               a.   Foothill hereby consents to the incurrence of the Tel-Save
Indebtedness by Borrower and the execution by Borrower of the Subordinated Note.
In connection with Borrower's incurrence of the Tel-Save Indebtedness, Borrower
promptly shall provide Foothill with copies of all agreements to be entered into
by Borrower in connection with Borrower's incurrence of the Tel-Save
Indebtedness.

                                         -7-



               b.   Foothill hereby consents to the incurrence of the Permitted
Offering Indebtedness.  In connection with Borrower's incurrence of the
Permitted Offering Indebtedness, Borrower promptly shall provide Foothill with
copies of all agreements to be entered into by Borrower in connection with
Borrower's incurrence of the Permitted Offering Indebtedness.

          5.   LIMITATION OF WAIVERS AND CONSENTS.  The waiver and consents
contained herein are limited to the specifics hereof, shall not apply with
respect to any facts or occurrences other than those on which each such waiver
and consent are based, shall not excuse future non-compliance with the Loan
Agreement or any other Loan Document, (as they may from time to time be
amended), except and only to the extent expressly set forth herein, shall not
operate as a waiver or an amendment of any right, power or remedy of Foothill,
nor as a consent to any further or other matter, under any of the Loan
Documents.

          6.   REPRESENTATIONS AND WARRANTIES.  Borrower hereby represents and
warrants to Foothill that (a) the execution, delivery, and performance of this
Amendment and of the Agreement, as amended by this Amendment, are within its
corporate powers, have been duly authorized by all necessary corporate action,
and are not in contravention of any law, rule, or regulation, or any order,
judgment, decree, writ, injunction, or award of any arbitrator, court, or
governmental authority, or of the terms of its charter or bylaws, or of any
contract or undertaking to which it is a party or by which any of its properties
may be bound or affected, and (b) this Amendment and the Agreement, as amended
by this Amendment, constitute Borrower's legal, valid, and binding obligation,
enforceable against Borrower in accordance with its terms.

          7.   CONDITIONS PRECEDENT TO AMENDMENT.  The satisfaction of each of
the following, on or before the Third Amendment Closing Deadline, unless waived
or deferred by Foothill in its sole discretion, shall constitute conditions
precedent to the effectiveness of this Amendment:

               a.   Foothill shall have received a waiver fee in the amount of
$10,000 from Borrower in connection herewith.

               b.   Each of the Guarantors shall have executed and delivered a
Guaranty Reaffirmation and Consent in form and substance satisfactory to
Foothill;

               c.   Foothill shall have received the acknowledgment and
agreement of each of its Participants in the secured credit facilities extended
to Borrower under the Agreement to this Amendment;

               d.   The representations and warranties in this Amendment, the
Agreement as amended by this Amendment, and the other Loan Documents shall be
true

                                         -8-



and correct in all respects on and as of the date hereof, as though made on such
date (except to the extent that such representations and warranties relate
solely to an earlier date);

               e.   No Event of Default or event which with the giving of notice
or passage of time would constitute an Event of Default shall have occurred and
be continuing on the date hereof (except for and excluding those Events of
Default specifically waived hereby), nor shall result from the consummation of
the transactions contemplated herein;

               f.   No injunction, writ, restraining order, or other order of
any nature prohibiting, directly or indirectly, the consummation of the
transactions contemplated herein shall have been issued and remain in force by
any governmental authority against Borrower or Foothill; and

               g.   All other documents and legal matters in connection with the
transactions contemplated by this Amendment shall have been delivered or
executed or recorded and shall be in form and substance satisfactory to Foothill
and its counsel.

          8.   FURTHER ASSURANCES.  Borrower shall execute and deliver all
agreements, documents, and instruments, in form and substance satisfactory to
Foothill, and take all actions as Foothill may reasonably request from time to
time fully to consummate the transactions contemplated under this Amendment and
the Agreement, as amended by this Amendment.

          9.   MISCELLANEOUS.

               a.   Upon the effectiveness of this Amendment, each reference in
the Agreement to "this Agreement", "hereunder", "herein", "hereof" or words of
like import referring to the Agreement shall mean and refer to the Agreement as
amended by this Amendment.

               b.   Upon the effectiveness of this Amendment, each reference in
the Loan Documents to the "Loan Agreement", "thereunder", "therein", "thereof"
or words of like import referring to the Agreement shall mean and refer to the
Agreement as amended by this Amendment.

               c.   As used in this Amendment, "Third Amendment Closing
Deadline" means May 1, 1998.

               d.   This Amendment shall be governed by and construed in
accordance with the laws of the State of California.

                                         -9-



               e.   This Amendment may be executed in any number of counterparts
and by different parties on separate counterparts, each of which, when executed
and delivered, shall be deemed to be an original, and all of which, when taken
together, shall constitute but one and the same Amendment.  Delivery of an
executed counterpart of this Amendment by telefacsimile shall be equally as
effective as delivery of a manually executed counterpart of this Amendment.  Any
party delivering an executed counterpart of this Amendment by telefacsimile also
shall deliver a manually executed counterpart of this Amendment but the failure
to deliver a manually executed counterpart shall not affect the validity,
enforceability, and binding effect of this Amendment.


                     [Remainder of page left intentionally blank]

                                         -10-



          IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed as of the date first written above.

                              COMMUNICATION TELESYSTEMS
                              INTERNATIONAL dba WORLDxCHANGE
                              COMMUNICATIONS,
                              a California corporation


                              By /s/ Edward S. Soren
                                 -------------------------------
                              Title:  Chairman of the Board
                                   --------------------------


                              WXL COMMUNICATIONS, LTD.,
                              a Canadian corporation


                              By /s/ Edward S. Soren
                                 -------------------------------
                              Title:  President
                                   --------------------------


                              CTS TELCOM, INC.,
                              a Florida corporation


                              By /s/ Edward S. Soren
                                 -------------------------------
                              Title:  President
                                   --------------------------


                              FOOTHILL CAPITAL CORPORATION,
                              a California corporation


                              By /s/ Kurt R. Marsden
                                 -------------------------------
                              Title: Vice President
                                   --------------------------


                                         -11-




PARTICIPANT ACKNOWLEDGEMENT AND CONSENT:

Each of the undersigned Participants hereby acknowledges and consents to the
foregoing Amendment in its entirety.


FREMONT FINANCIAL CORPORATION,
a California corporation

By /s/ [ILLEGIBLE]
   -------------------------------
Title:  Vice President
      ----------------------------


RESERVOIR CAPITAL CORPORATION,
a Maryland corporation

By
   -------------------------------
Title:
      ----------------------------


                                         -12-





                    LIST OF OMITTED EXHIBITS AND SCHEDULES

     The following Exhibits and Schedules to Amendment Number Three to the
Loan and Security Agreement have been omitted from this Exhibit and shall be
furnished supplementally to the Commission upon request:

     Exhibit A - Subordinated Note

     Schedule 1 - Subsidiaries