Multiplex communications – Pathfinding or routing – Through a circuit switch
Patent
1997-02-20
1999-05-18
Vu, Huy D.
Multiplex communications
Pathfinding or routing
Through a circuit switch
H04J3/12
Patent
active
059057246
ABSTRACT:
A programmable message substitution unit PMSU (60) is provided for modifying signalling messages passing across a link (61) of a telecommunications signalling network without disrupting the link-level procedures operating over the link. In the event of a power failure or upon the detection of an operational anomaly, a bypass relay arrangement (65) is used to bypass the PMSU (60). The PMSU (60) comprises a substitution block for modifying selected messages, a database block for doing database lookups to ascertain new message parameter values to be substituted for existing ones, and a supervision block for checking the operation of the substitution block. The PMSU may be used to implement local number portability or other services.
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Carson Douglas John
Galloway James Robertson
Kabay Salih
Mottishaw Peter John
Hewlett-Packard Limited
Vu Huy D.
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