The performance of well trained speech recognizers using high quality full bandwidth speech data is usually degraded when used in real world environments In particular telephone speech recognition is extremely di cult due to the limited bandwidth of transmission channels In this paper neural network based adaptation methods are applied to telephone speech recognition and a new unsupervised mode...

The NYNEX Corporation invests hundreds of millions of dollars each year to enhance the telecommunications services provided to its customers. Extensive planning and construction are required to meet the ever-increasing demand for better service and provide the latest in sophisticated equipment throughout the telephone network. Engineering groups plan changes to network facilities five years ahe...

The effect of the user network on the telephone network traffic is studied in this paper. Unlike classical traffic analysis, where users are assumed to be connected uniformly, our proposed method employs a scale-free network to model the behavior of telephone users. Each user has a fixed set of acquaintances with whom the user may communicate, and the number of acquaintances follows a power-law...

The access network is the connection between the telephone in your home and the local exchange. It is the first step of a customer’s connection to the rest of the national telephone network. Traditionally this connection is a twisted pair of copper wires, which is adequate for telephone calls, but the wide scale introduction of the Internet is placing higher bandwidth demands on the entire netw...

A paging network (see Figure 1) begins at the connection to the public switched network or telephone lines. The caller can initiate a page through voice mail or a paging operator, or can leave a message by entering touchtones from a telephone. Pages are assembled in the paging terminal and sent to the network controller, where they are combined into batches based on their final destination. Bil...

We believe that a broad class of future applications will span both the Internet and the telephone network because such multiplanar applications have several economic and architectural advantages over conventional ones. We also envision the close interlinking of the telephone network and the Internet to form a multimodal network. In this paper, we describe these applications and networks, outli...