Digital telephone switch: Software

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Optimized Digital Optical Switch Using Proton Exchanged Lithium Niobate Waveguides

The main emphasis in developing DOS has been on achieving low crosstalk (CT). CT in the order of -30 dB is acceptable in conventional DOS and below that value is hard to achieve. Relatively low drive voltage (or power requirements) is also necessary to optimized DOS. This paper depicts the design of Y-branched digital optical switches (DOS) with optimized on-chip area coverage, reduced driving ...

متن کامل

Telephone system suffering , new switch in sight

by Patty Cleary D u e t o the obso lescence of the m a i n t e l e p h o n e switch, the Rice t e l e p h o n e sys tem is having serious p r o b l e m s , a c c o r d i n g t o D r . Wi l l i am Akers , Vice Pres ident fo r A d m i n i s t r a t i o n . P r e l i m i n a r y e s t ima te s for r e p l a c e m e n t of the swi tch , tenta t ive ly set fo r th is s u m m e r , a re in the $1.5 t...

متن کامل

Maintaining Telephone Switching Software Requirements ∗

We discuss how telephony software requirements should be structured to reduce maintenance costs. “Feature interaction” problems have become a serious obstacle to add more features to telephone switches. We show why existing public switched telephone networks are hard to modify. We then argue that a more modular, layered requirements architecture can help. Finally we survey approaches for such a...

متن کامل

Early Digital Computers at Bell Telephone Laboratories

(Bell Labs) during the 20-some years following Bell Labs' entry into the digital computer era. In doing so, I describe various problems that Bell Labs was addressing and characteristics of the machines developed as solutions. During this period, Bell Labs was AT&T's research and development arm, and Western Electric was AT&T's manufacturing division. Western Electric and AT&T each owned 50 perc...

متن کامل

Scheduling on a Scalable Multiprocessor-Based Telephone Switch

One of the key obstacles to achieving full processing capacity of a shared memory multiprocessor is memory access contention, the extent to which processes access the same location at the sarne time. Accesses to the sarne variable by two or more concurrently executing processes may result in an inconsistent state of the variable. A common way for preventing memcry access contention is disjointi...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of Applied Research and Technology

سال: 2003

ISSN: 2448-6736,1665-6423

DOI: 10.22201/icat.16656423.2003.1.02.599