Telcordia Technologies

About: Telcordia Technologies is a based out in . It is known for research contribution in the topics: Network packet & Node (networking). The organization has 3097 authors who have published 4737 publications receiving 237882 citations.

System and method for managing feature interaction of telephone services

Abstract: A service control processor (100) includes a plurality of service feature processors (106a-106n), each corresponding to a selected telephone service, and a plurality of call processing records (104a, 104n), each corresponding to a customer of a service provider. The customer call processing records specify services subscribed to by the caller. A feature manager processor (102) manages call processing and the implementation and execution of services by managing the individual service feature processors. In an alternative embodiment, multiple feature manager processors are included, and a trigger manager selects between them in response to call processing triggers.

Mode power partition events in nearly single-frequency lasers

Abstract: Frequent power dropouts are observed in the single dominant line of a number of dc-biased 1.3-μm injection lasers, each of which exhibits a nearly single-longitudinal-mode CW spectrum. During the dropout events, some of which essentially extinguish the dominant line for 1 to 8 ns, total laser output power is observed to remain constant: the power lost from the dominant mode appears in a side mode of very low average power. These events are capable of causing bit errors in a communications system. It was found that the frequency of events greater than a given threshold value falls exponentially with an increasing ratio of main-to-side-mode powers and that this ratio must exceed 100:1 in order to avoid a significant contribution to system error rates when the laser is operated continuously and an external modulator is used. These observations are in agreement with recently published calculations. The requirements on mode power ratio for the case of directly modulated lasers are much more severe. We present a calculation of the optical power penalty resulting from these mode power fluctuations.

Bundled protection switching in a wide area network background of the invention

Abstract: Protection Bundles (PB) facilitate efficient protection switching in a network and can be applied at any network layer. A PB is preferably assigned to all working signals sharing the exact same protection facilities. The working facilities that a PB traverses define a Bundled Protection Fragment (BPF)(560, 564, 568). The end-points of the BPF exchange coordination protocol messages along the protection facilities when necessary. The protection facilities between the end-points of a BPF define each BPFs Common Protection Route (CPR)(562, 566, 570).

Image analysis of shear-induced textures in liquid-crystalline polymers

Abstract: Textures of several liquid-crystalline solutions of poly(benzylglutamate) and a solution of hydroxypropylcellulose were videorecorded during and after shear and the images were Fourier transformed. We find for all the solutions that bands perpendicular to the flow direction form after cessation of prolonged shearing if the Deborah number De exceeds a critical value Dec≈0·1. Here De = τ , where is the shear rate and τ is the characteristic molecular relaxation time. The bands are characterized by an initially broad spectrum of wavelengths; for the poly(benzylglutamate) solutions this spectrum narrows and shifts towards longer wavelengths as time progresses after cessation of shear, leading to an increase in the characteristic band spacing b(t) with time t. The dependences of the band spacing on the shear rate and on the solution viscosity n in poly(benzylglutamate) are very weak, but the time to form bands after shearing ceases is roughly inversely proportional to 0. Our results suggest that both ...