Document:

[CREDIT SUISSE LETTERHEAD]

                              Facsimile Cover Sheet

To:                     Wells Fargo Bank, N.A., not in its individual or
                        corporate capacity but solely as Trustee on behalf of
                        Credit Suisse Commercial Mortgage Trust Series 2007-C1

Attention:              Heakyung Chung, CSIN Marketer

Fax number:             To be delivered by Heakyung Chung

Date:                   16 March 2007

Pages (including cover page):       8

Our Reference No: External ID: 9382621N3 / Risk ID: 570600167

Credit Suisse International has entered into a transaction with you as
attached. Please find attached a letter agreement (the "Confirmation") which
confirms the terms and conditions of the above transaction.

If you agree with the terms specified therein, please arrange for the
Confirmation to be signed by your authorised signatories and return a signed
copy to this office to the facsimile listed below.

<TABLE>
<CAPTION>
<S>                                                  <C>
For Interest Rate Products:                          For Equity Derivatives:
Telephone Numbers: (212) 538-9370                    Telephone numbers: (212) 538-4437 /
Facsimile number: (917) 326-8603                     (212) 538-8297 / (212) 325-5119
Email: list.otc-inc-accept-ny@credit-suisse.com      Facsimile number: (212) 325-8173
</TABLE>

For Credit Derivatives:
Telephone Numbers: (212) 538-9370
Facsimile number: (917) 326-8603
Email: list.otc-inc-accept-ny@credit-suisse.com

We are delighted to have entered into this transaction with you.

CONFIDENTIALITY NOTICE: This facsimile is intended only for the use of the
individual or entity to which it is addressed and may contain information
which is privileged and confidential. If the reader of this message is not
the intended recipient or an employee or agent responsible for delivering the
message to the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this communication is strictly
prohibited. If you have received this communication in error, please notify
us immediately by telephone and return the original message to us by mail.
Thank you.

<PAGE>

                                           BALANCE GUARANTEED INTEREST RATE SWAP

                                                                   16 March 2007

Wells Fargo Bank, N.A., not in its individual or corporate capacity but solely
as Trustee on behalf of Credit Suisse Commercial Mortgage Trust Series 2007-C1

External ID: 9382621N3/ Risk ID: 570600167

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

Dear Sir/Madam:

The purpose of this letter agreement (this Confirmation) is to confirm the terms
and conditions of the Transaction entered into between us on the Trade Date
specified below (the Transaction). This Confirmation constitutes a
"Confirmation" as referred to in the Agreement specified below.

In this Confirmation "CSIN" means Credit Suisse International and "Counterparty"
means Wells Fargo Bank, N.A., not in its individual or corporate capacity but
solely as Trustee on behalf of Credit Suisse Commercial Mortgage Trust Series
2007-C1.

1.    The definitions and provisions contained in the 2000 ISDA Definitions (as
      published by the International Swaps and Derivatives Association, Inc.)
      (the Definitions) are incorporated into this Confirmation. In the event of
      any inconsistency between those definitions and provisions and this
      Confirmation, this Confirmation will govern. References herein to a
      "Transaction" shall be deemed to be references to a "Swap Transaction" for
      the purposes of the Definitions.

      This Confirmation supplements, forms part of, and is subject to, the 1992
      ISDA Master Agreement dated as of 16 March 2007 (including the schedule
      thereto) as amended and supplemented from time to time (the Agreement),
      between CSIN and Counterparty. All provisions contained in the Agreement
      govern this Confirmation except as expressly modified below. All terms
      used herein and not otherwise defined are given their meaning in the
      pooling and servicing agreement dated as of 1 March 2007 between Credit
      Suisse First Boston Mortgage Securities Corp., as Depositor, Capmark
      Finance Inc., as Master Servicer, Midland Loan Services, Inc., as Special
      Servicer, and Wells Fargo Bank, N.A., as Trustee for the Trust, as amended
      and supplemented from time to time (the Pooling and Servicing Agreement).
      In the event of an inconsistency between the terms defined in the Pooling
      and Servicing Agreement and this Confirmation, this Confirmation will
      govern.

2.    The terms of the particular Transaction to which this Confirmation relates
      are as follows:

Trade Date:                    28 February 2007

Effective Date:                16 March 2007

Termination Date:              The earliest of (a) the date on which the
                               Notional Amount has been reduced to zero, (b) the
                               date on which the option to purchase the Loans
                               pursuant to Section 9.01 of the Pooling and
                               Servicing Agreement has been exercised, (c) the
                               date on which the Trust Fund (as defined in the
                               Pooling and Servicing Agreement) is terminated
                               pursuant to the Pooling and Servicing Agreement
                               and (d) the Distribution Date in February 2040.

Notional Amount:               In respect of each Payment Date, the total
                               Certificate Principal Balance of the Class A-MFL
                               Certificates as of the last day of the calendar
                               month immediately preceding such Payment Date.

Payment Dates:                 The day that is one Business Day prior to each
                               Distribution Date, beginning on the Distribution
                               Date in April 2007 and ending on the Termination
                               Date.

Business Days:                 New York, Minnesota, Maryland and Pennsylvania

Upfront Fixed Amount

Upfront Fixed Amount Payer:    CSIN

Upfront Fixed Amount:          USD 903,370.83

Upfront Fixed Amount Payer     Effective Date

Payment Date:

Fixed Amounts

Fixed Amount Payer:            Counterparty

Fixed Amounts:                 In respect of each Payment Date, an amount equal
                               to:

                               (a)   the Regular Fixed Amount; minus

                               (b)   any Fixed Amount Interest Shortfall
                                     Reduction Amount; plus
                               (c)   any Fixed Amount Interest Shortfall
                                     Reimbursement Amount; plus

                               (d)   any Yield Maintenance Charges distributable
                                     pursuant to Section 4.01(j) of the Pooling
                                     and Servicing Agreement in respect of the
                                     Class A-MFL Regular Interest in respect of
                                     the Distribution Date to which such Payment
                                     Date relates.

Regular Fixed Amount:          In respect of each Payment Date, an amount equal
                               to the product of: (i) 1/12; (ii) the Notional
                               Amount; and (iii) 5.4160 per cent per annum.

Fixed Amount Interest
Shortfall Reduction            In respect of any Payment Date, either (a) zero
Amounts:                       or (b) if the Regular Fixed Amount exceeds the
                               amount of interest distributions with respect to
                               the Class A-MFL Regular Interest required to be
                               on deposit (or deemed on deposit) in the Floating
                               Rate Account (as defined in the Pooling and
                               Servicing Agreement) in respect of the
                               Distribution Date to which such Payment Date
                               relates, the amount of such excess.

Fixed Amount Interest          In respect of any Payment Date, (a) zero or (b)
Shortfall Reimbursement        if the amount of interest distributions with
Amounts:                       respect to the Class A-MFL Regular Interest
                               required to be on deposit (or deemed on deposit)
                               in the Floating Rate Account in respect of the
                               Distribution Date to which such Payment Date
                               relates exceeds the Regular Fixed Amount in
                               respect of such Payment Date, an amount equal to
                               the lesser of such excess interest distributions
                               and the Cumulative Fixed Amount Interest
                               Shortfall Reduction Amount in respect of such
                               Payment Date.

                               Any Fixed Amount Interest Shortfall Reimbursement
                               Amount shall be deemed to reimburse outstanding
                               Fixed Amount Interest Shortfall Reduction Amounts
                               in the order in which they arose.

                               Cumulative Fixed Amount Interest Shortfall
                               Reduction Amount means, as of any Payment Date,
                               (a) the sum of all Fixed Amount Interest
                               Shortfall Reduction Amounts prior to such date
                               minus (b) the sum of all Fixed Amount Interest
                               Shortfall Reimbursement Amounts prior to such
                               date.

                               For the avoidance of doubt, interest
                               distributions with respect to the Class A-MFL
                               Certificates do not include Yield Maintenance
                               Charges for the purposes of calculating the Fixed
                               Amount Interest Shortfall Reduction Amounts or
                               Fixed Amount Interest Shortfall Reimbursement
                               Amounts.

Floating Amounts
Floating Amount Payer:         CSIN

Floating Amount:               Notwithstanding Section 6.1 of the Definitions,
                               the Floating Amount payable by CSIN on a Payment
                               Date will be an amount equal to (a) the Floating
                               Amount calculated pursuant to Section 6.1 of the
                               Definitions plus (b) any Floating Amount Interest
                               Shortfall Reimbursement Amount minus (c) any
                               Floating Amount Interest Shortfall Reduction
                               Amount.

Floating Rate Option:          USD-LIBOR-BBA

Designated Maturity:           One month

Spread:                        0.1900 per cent.

Floating Rate in respect of
first Floating Rate Payer
Calculation Period:            5.32 per cent.

Reset Dates:                   The first day of each Floating Rate Payer
                               Calculation Period.

Floating Rate Day Count
Fraction:                      Actual/360

Floating Rate Payer            The period from and including one Distribution
Calculation Period:            Date, to but excluding the following Distribution
                               Date, provided that the first Floating Rate Payer
                               Calculation Period shall begin on, and include,
                               the Effective Date and the final Floating Rate
                               Payer Calculation Period shall end on, but
                               exclude, the Termination Date.

Floating Amount Interest
Shortfall Reduction            If, on any Payment Date, a Fixed Amount Interest
Amount:                        Shortfall Reduction Amount exists in respect of
                               the Distribution Date to which such Payment Date
                               relates, an amount equal to the product of:

                               (i)   the Fixed Amount Interest Shortfall
                                     Reduction Amount; multiplied by

                               (ii)  the quotient of:

                               (A)   the product of:

                                     (I)   Floating Rate for such Floating Rate
                                           Payer Calculation Period plus 0.1900
                                           per cent.;

                                     (II)  the quotient of the actual number of
                                           days in the related Floating Rate
                                           Payer Calculation Period divided by
                                           360; and

                                     (III) the Notional Amount;
                                           divided by
                               (B)   the Regular Fixed Amount.

                               (such quotient, the Interest Rate Proportion).

Floating Amount Interest
Shortfall Reimbursement        If on any Payment Date a Fixed Amount Interest
Amounts:                       Shortfall Reimbursement Amount exists in respect
                               of the Distribution Date to which such Payment
                               Date relates, an amount equal to the product of:

                               (i)   the Fixed Amount Interest Shortfall
                                     Reimbursement Amount: multiplied by

                               (ii)  the Interest Rate Proportion that was
                                     applicable to the Floating Amount Interest
                                     Shortfall Reduction Amount corresponding to
                                     the Fixed Amount Interest Shortfall
                                     Reduction Amount being reimbursed.

Delivery of information under
the Pooling and Servicing      Counterparty shall provide the information set
Agreement Reports:             out in Section 3.28(c) of Pooling and Servicing
                               Agreement to CSIN by no later than 5:00 pm (New
                               York time) one Business Day prior to each Payment
                               Date.

Notice of Payments:            CSIN shall, on the Business Day prior to each
                               Payment Date, provide written notice to the
                               Trustee providing details, for such Payment Date,
                               of the Floating Amount, the Fixed Amount and the
                               excess, if any, of the Fixed Amount over the
                               Floating Amount.

3.    Additional provisions    Notwithstanding Section 2(c) of the Agreement or
                               anything else herein to the contrary, if on any
                               Payment Date, but for this provision, a net
                               payment would be payable by Party B, such payment
                               shall be made on the Distribution Date
                               immediately following such Payment Date.

                               Notwithstanding anything in the Agreement to the
                               contrary, any payment obligations of Counterparty
                               hereunder are limited in recourse to only the
                               amounts with respect to interest on the Class
                               A-MFL Regular Interest on deposit in the Floating
                               Rate Account (as such terms are defined in the
                               Pooling and Servicing Agreement) and any Yield
                               Maintenance Charges distributable in respect of
                               the Class A-MFL Regular Interest pursuant to
                               Section 4.01(j) of the Pooling and Servicing
                               Agreement (plus all payments received by
                               Counterparty from a replacement swap
                               counterparty, if any), if any, held by the
                               Trustee in accordance with the Pooling and
                               Servicing Agreement. CSIN shall have no right to
                               institute any proceedings for the enforcement of
                               a lien on any Trust Assets except to the extent
                               of interest on the Class A-MFL Regular Interest
                               on deposit in the Floating Rate Account and any
                               Yield Maintenance Charges distributable in
                               respect of the Class A-MFL Regular Interest
                               pursuant to Section 4.01(j) of the Pooling and
                               Servicing Agreement (plus all payments received
                               by Counterparty from a replacement swap
                               counterparty, if any). Upon the realization of
                               the Trust Fund and distribution of the net
                               proceeds thereof with respect to the Class A-MFL
                               Regular Interest (plus all payment received by
                               Counterparty from a replacement swap
                               counterparty, if any) in accordance with Section
                               4.01 of the Pooling and Servicing Agreement, CSIN
                               shall not be entitled to take any further steps
                               against Counterparty to recover any sums due but
                               still unpaid hereunder or under the Pooling and
                               Servicing Agreement and all claims hereunder and
                               all claims in respect of the Pooling and
                               Servicing Agreement shall be extinguished.

                               For the avoidance of doubt, the Counterparty
                               shall be under no obligation to pay costs,
                               expenses or termination payments due hereunder,
                               except to the extent such amounts have been paid
                               to the Counterparty by a replacement swap
                               counterparty after netting out costs and expenses
                               incurred by Counterparty or to the extent of
                               funds available in the Floating Rate Account in
                               accordance with Section 9.02(b) of the Pooling
                               and Servicing Agreement.

4.    Account details:

Payments to CSIN:              As advised separately in writing.

Payments to Counterparty:      Wells Fargo Bank, N.A.
                               ABA: 121 000 248
                               Account: 3970771416
                               FBO: SA5 Clearing
                               Further Credit to: SEI Account 50992900
                               Reference: CSMC 2007-C1
                               Attention: Amy Mofsenson (212) 515-5254
                               or other wire instructions as may be provided by
                               Counterparty to CSIN in writing.

For the purpose of facilitating this Transaction, an Affiliate of CSIN, which
is organized in the United States of America (the "Agent"), has acted as
agent for CSIN. The Agent is not a principal with respect to this Transaction
and shall have no responsibility or liability to the parties as a principal
with respect to this Transaction.

Credit Suisse International is authorized and regulated by the Financial
Services Authority and has entered into this transaction as principal. The
time at which the above transaction was executed will be notified to
Counterparty on request.

<PAGE>

Please confirm that the foregoing correctly sets forth the terms of our
agreement by signing and returning this Confirmation.

                                        Yours faithfully,

                                        CREDIT SUISSE INTERNATIONAL

                                        By: /s/ Marlene Nobile
                                           -------------------------------------
                                        Name: Marlene Nobile
                                        Title: Authorized Signatory

                                        By: /s/ Steven J. Reis
                                           -------------------------------------
                                        Name: Steven J. Reis
                                        Title: Authorized Signatory

Confirmed as of the date first written above:

CREDIT SUISSE COMMERCIAL MORTGAGE TRUST SERIES 2007-C1

By Wells Fargo Bank N.A., not in its individual capacity but solely as Trustee
on behalf of the Credit Suisse Commercial Mortgage Trust Series 2007-C1

By: /s/ Amy Mofsenson
   -------------------------------------
Name: Amy Mofsenson
Title: Vice President

Our Reference No: External ID: 9382621N3 / Risk ID: 570600167[CREDIT SUISSE LETTERHEAD]

                              Facsimile Cover Sheet

To:                     Wells Fargo Bank, N.A., not in its individual or
                        corporate capacity but solely as Trustee on behalf of
                        Credit Suisse Commercial Mortgage Trust Series 2007-C1

Attention:              Heakyung Chung, CSIN Marketer

Fax number:             To be delivered by Heakyung Chung

Date:                   16 March 2007

Pages (including cover page):       5

Our Reference No: External ID: 9382621NOV / Risk ID: 570600167

Credit Suisse International has entered into a transaction with you as attached.
Please find attached a letter agreement (the "Confirmation") which confirms the
terms and conditions of the above transaction.

If you agree with the terms specified therein, please arrange for the
Confirmation to be signed by your authorised signatories and return a signed
copy to this office to the facsimile listed below.

<TABLE>
<CAPTION>
<S>                                                  <C>
For Interest Rate Products:                          For Equity Derivatives:
Telephone Numbers: (212) 538-9370                    Telephone numbers: (212) 538-4437 / (212) 538-8297 /
Facsimile number: (917) 326-8603                     (212) 325-5119
Email: list.otc-inc-accept-ny@credit-suisse.com      Facsimile number: (212) 325-8173
</TABLE>

For Credit Derivatives:
Telephone Numbers: (212) 538-9370
Facsimile number: (917) 326-8603
Email: list.otc-inc-accept-ny@credit-suisse.com

We are delighted to have entered into this transaction with you.

CONFIDENTIALITY NOTICE: This facsimile is intended only for the use of the
individual or entity to which it is addressed and may contain information which
is privileged and confidential. If the reader of this message is not the
intended recipient or an employee or agent responsible for delivering the
message to the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this communication is strictly
prohibited. If you have received this communication in error, please notify us
immediately by telephone and return the original message to us by mail. Thank
you.

<PAGE>

                                          Novation Confirmation

Date:    16 March 2007

To:      Wells Fargo Bank, N.A., not in its individual or corporate capacity but
         solely as Trustee on behalf of Credit Suisse Commercial Mortgage Trust
         Series 2007-C1

To:      Credit Suisse Management LLC

From:    Credit Suisse International ("CSIN")

Re:      Novation Transaction

External ID: 9382621NOV

--------------------------------------------------------------------------------
Dear Sir/Madam:

      The purpose of this letter is to confirm the terms and conditions of the
Novation Transaction entered into between the parties and effective from the
Novation Date specified below. This Novation Confirmation constitutes a
"Confirmation" as referred to in the New Agreement specified below.

      1.    The definitions and provisions contained in the 2004 ISDA Novation
Definitions (the "Definitions") and the terms and provisions of the 2000 ISDA
definitions (the "Product Definitions"), each as published by the International
Swaps and Derivatives Association, Inc. and amended from time to time, are
incorporated in this Novation Confirmation. In the event of any inconsistency
between (i) the Definitions, (ii) the Product Definitions and/or (iii) the
Novation Agreement and this Novation Confirmation, this Novation Confirmation
will govern. In the event of any inconsistency between the Novation Confirmation
and the New Confirmation, the New Confirmation will govern for the purpose of
the New Transaction.

      2.    The terms of the Novation Transaction to which this Novation
Confirmation relates are as follows:

      Novation Date:            16 March 2007. For the avoidance of doubt, the
                                Transferee shall have no obligations or
                                liabilities under the New Transaction prior to
                                the Novation Date.

      Novated Amount:           In respect of each Payment Date, the total
                                Certificate Principal Balance of the Class
                                A-MFL Certificates as of the last day of the
                                calendar month immediately preceding such
                                Payment Date.

      Transferor:               Credit Suisse Management LLC

      Transferee:               Wells Fargo Bank, N.A., not in its individual
                                or corporate capacity but solely as Trustee
                                on behalf of Credit Suisse Commercial Mortgage
                                Trust Series 2007-C1

      Remaining Party:          CSIN

      New Agreement (between
      Transferee and Remaining  1992 ISDA Master Agreement dated as of
      Party):                   16 March 2007

      3.    The terms of the Old Transaction to which this Novation Confirmation
relates, for identification purposes, are as follows:

      Trade Date of Old
      Transaction:              28 February 2007

      Effective Date of
      Old Transaction:          16 March 2007

      Termination Date of
      Old Transaction:          The earliest of (a) the date on which the
                                Notional Amount has been reduced to zero, (b)
                                the date on which the option to purchase the
                                Loans pursuant to Section 9.01 of the Pooling
                                and Servicing Agreement has been exercised,
                                (c) the date on which the Trust Fund (as
                                defined in the Pooling and Servicing
                                Agreement) is terminated pursuant to the
                                Pooling and Servicing Agreement and (d) the
                                Distribution Date in February 2040.

      4.    The terms of the New Transaction to which this Novation Confirmation
relates shall be as specified in the New Confirmation attached hereto as Exhibit
A.

      Full First Calculation Period:      Applicable

      5.    Miscellaneous Provisions:

      Non-Reliance:                       Applicable

For the purpose of facilitating this Transaction, an Affiliate of CSIN, which is
organized in the United States of America (the "Agent"), has acted as agent for
CSIN. The Agent is not a principal with respect to this Transaction and shall
have no responsibility or liability to the parties as a principal with respect
to this Transaction.

Credit Suisse International is authorized and regulated by the Financial
Services Authority and has entered into this transaction as principal. The time
at which the above transaction was executed will be notified to the parties on
request.

<PAGE>

      The parties confirm their acceptance to be bound by this Novation
Confirmation as of the Novation Date by executing a copy of this Novation
Confirmation and returning it to us. The Transferor, by its execution of a copy
of this Novation Confirmation, agrees to the terms of the Novation Confirmation
as it relates to the Old Transaction. The Transferee, by its execution of a copy
of this Novation Confirmation, agrees to the terms of the Novation Confirmation
as it relates to the New Transaction.

Credit Suisse International

By:  /s/ Marlene Nobile
    ----------------------------
Name: Marlene Nobile
Title: Authorized Signatory

By:  /s/ Steven J. Reis
    ----------------------------
Name: Steven J. Reis
Title: Authorized Signatory

Credit Suisse Management LLC

By:  /s/ Christy Grant
    ----------------------------
Name: Christy Grant
Title: Vice President

Wells Fargo Bank, N.A., not in its individual or corporate capacity but solely
as Trustee on behalf of Credit Suisse Commercial Mortgage Trust Series 2007-C1

By:  /s/ Amy Mofsenson
    ----------------------------
Name:   Amy Mofsenson
Title: Vice President

Our Reference No: External ID: 9382621NOV

<PAGE>

                                    EXHIBIT A

This New Confirmation amends, restates and supersedes in its entirety all
Confirmation(s) dated prior to the date hereof in respect of this New
Transaction.

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