March 12, 1997
Mr. Steven F. X. Murphy
5023 Reno Road N.W.
Washington, DC  20008


Dear Steve:


I am pleased to offer you the position of Vice President - Sales and 
Marketing with Applied Digital Access, Inc., reporting to me.  Everyone at 
ADA is enthusiastic about you joining the ADA team as a regular full-time 
employee.

Your compensation will be $6,250.00, paid semimonthly (equivalent to 
$150,000.00 annualized).  In addition, you will receive the other benefits 
afforded to all regular full-time employees of ADA.  These include two weeks 
paid vacation, partially paid health insurance coverage through participation 
in ADA's Section 125 Cafeteria Plan, the opportunity to participate in a 
401(k) plan, and the opportunity to participate in ADA's Stock Purchase Plan.

As Vice President - Sales and Marketing, you will be an officer of the 
Company and will participate in the Management Team Incentive Compensation 
Plan.  The Sales Management Incentive Compensation portion of the Plan 
provides for incentive compensation of up to $125,000 at plan, and up to 
$175,000 at 110% of plan as approved by the Compensation Committee of the 
Board of Directors.  The incentive compensation is earned depending on actual 
performance against company and business unit objectives as described in the 
attached compensation plan summary.  You will be entitled to draw up to 
$50,000 of this incentive compensation semimonthly.  In the unlikely event of 
you not earning the amount you actually draw, at the discretion of the 
Compensation Committee, you may be required to refund to the company amounts 
drawn which are greater than your earnings under the plan.

As a key part of your compensation package, I will recommend to the Board of 
Directors that you be granted an option to purchase 75,000 shares of ADA 
common stock in accordance with ADA's Incentive Stock Option Plan.  This 
stock will vest over a four-year period, with one-fourth fully vested at the 
end of your first twelve months of employment at ADA and the remainder 
vesting monthly thereafter.  The exercise price of shares granted under ADA's 
Incentive Stock Option Plan will be the closing price of ADA stock on the 
NASDAQ exchange on the day your option is granted by ADA's Board of Directors.



To assist you in relocating to San Diego, we will provide reimbursement for 
up to $50,000 for documented and reasonable relocation and interim living 
expenses as incurred.  This amount will be subject to Federal and State 
withholding regulations.  We will reimburse you for those taxes to be paid up 
to a maximum of $20,000.  If you voluntarily leave ADA before the end of two 
years from your date of hire, this relocation assistance will be deemed 
subject to prorated repayment based on the number of months you work at ADA.

Employment with Applied Digital Access is not for a specific term and can be 
terminated by you or by ADA at any time for any reason, with or without 
cause, and with or without prior notice.  Any contrary representations which 
may have been made to you are superseded by this offer.  No person affiliated 
with ADA has the authority to enter into any verbal agreement to change the 
at will nature of your employment.  Longevity of employment, promotions, pay 
raises, bonuses, and positive performance evaluations will not change the 
at-will status of your employment with ADA.  Any modification to this at-will 
term of your employment must be expressed in writing and signed by you and by 
me.

In the event your employment is terminated by the company for any reason 
other than Cause (as defined below), you will be entitled to a continuation 
of base salary (less applicable taxes, other required withholdings and any 
amount owed by you to the company) for a period of three months from the date 
of termination, such three month period to be known as the severance term. 
Severance payments shall be payable in equal installments monthly commencing 
one month after the date of termination.  The Company's obligation to make 
severance payments will terminate upon the earlier of (1) the date three 
months after termination of employment or (2) the date on which you commence 
employment with another employer.  During the severance term, you will 
continue to be treated as a company employee for purposes of all company 
provided employee benefits, other than incentive compensation, bonus, profit 
sharing or similar plans, stock option vesting and vacation eligibility.

In the event your employment is terminated by the company for any reason 
other than Cause, you also will be entitled to be paid, at the same time such 
payments are made to other officers of the Company, your pro rata share for 
any bonus or profit sharing plans in which you participated for the portion 
of the year that you remained employed by the Company to the extent not 
inconsistent with the terms of any such plan.

In the event your employment is terminated by the company for any reason 
other than Cause, you will be relieved of your obligation to repay relocation 
expenses to the company, and to repay any draw that is in excess of earned 
amounts, up to the date of your termination.



For these purposes, "Cause" means:

(i)   failure by you to substantially perform your duties herein, other than
      failure resulting from complete or partial incapacity due to physical
      or mental illness or impairment,
(ii)  an act by you which constitutes misconduct and/or which is injurious
      to the company, or
(iii) a violation of federal or state laws or regulation applicable to the
      business of the Company, or
(iv)  any violation of the Company's Proprietary Information and Inventions
      Agreement.

ADA is committed to a drug-free workplace and has a zero-tolerance drug 
policy. Illegal possession or use of drugs of any kind, at any time, on or 
off company premises within or outside of working hours may result in 
immediate dismissal. 

Smoking is not permitted on company property or at any company off-premises 
events.

This offer is contingent on your executing the enclosed Proprietary 
Information and Inventions Agreement and providing ADA with the legally 
required proof of your identity and authorization to work in the United 
States.

Please sign both copies of this letter, retain one copy for your files, and 
return the second copy to us as soon as possible.  Everyone is delighted to 
have you join our team.   I look forward to working with you, and to enjoying 
the success our team will realize together.

                                   Very truly yours,


                                   /s/ Peter P. Savage
                                   -----------------------------
                                   Peter P. Savage
                                   President and CEO

Please indicate your acceptance of this offer by signing below:

  My first day of employment will be March 31, 1997.

  Accepted /s/ Steven F. X. Murphy           Date 3/17/97
           ---------------------------------      -------
               Steven F. X. Murphy