Calling number identification for a radiotelephone operating within a public or autonomous system

• US 6,233,450 B1
• Filed: 12/02/1997
• Issued: 05/15/2001
• Est. Priority Date: 12/02/1997
• Status: Expired due to Term

• Current Assignee: RPX Corporation
• Original Assignee: Nokia Mobile Phones UK Limited (Nokia Corporation)
• Inventors: Seppanen, Jorma
• Primary Examiner(s): Nguyen, Lee
• Application Number:
  US08/982,957
• Time in Patent Office: 1,260 Days
• Field of Search: 455/426, 455/465, 455/552, 455/564, 455/435, 455/463, 455/554
• US Class Current: 455/426.1
• CPC Class Codes: H04M 1/27485 Appending a prefix to or inserting a pause into a dialling sequence
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 1/72505 Radio link set-up procedures

Abstract

A cellular radiotelephone (user terminal) (10) includes a keypad (22) having a plurality of keys (22a, 22b) and a display device (20) for displaying information, including messages, to a user. A method includes the steps of providing the user terminal with an access code for a destination receiving device, and specifying that the user terminal provide a communication signal through at least one communication network to the destination receiving device. The at least one communication network is assumed to have a capability of forwarding received communication signals that include access codes having a predetermined format to destination receiving devices. In response to specifying step, another step is performed that includes determining whether a format of the access code provided to the user terminal differs from the predetermined format. If these formats differ, another step includes modifying the format of the access code provided to the user terminal to produce a modified access code having the predetermined format. A further step includes providing the communication signal, including the modified access code, through the at least one network to the destination receiving device corresponding to the access code originally provided to the user terminal.

Claims

1. An autonomous system, wherein said autonomous system is coupled to a public switched telephone network (PSTN) having a public cellular system, and said autonomous system is capable of operation with a mobile terminal operable in both said autonomous system and in said public cellular system, said autonomous system comprising:

a receiver for receiving a call comprising a first call signal from the mobile terminal, said first call signal including a called number, said called number including an extra network dialing code and an extension portion;

a controller coupled to said receiver, said controller for receiving said first call signal from said receiver and generating a second call signal, wherein said controller compares said extension portion of said called number with a plurality of extension numbers of said autonomous system to determine whether or not said extension portion is within said plurality of extension numbers and, if said extension portion is not within said plurality of extension numbers generates said second call signal including said extra network dialing code and said extension portion, or, if said extension portion is within said plurality of extension numbers, generates said second call signal including said extension portion without including said extra network dialing code; and

an exchange coupled to said controller, said exchange for receiving said second call signal and, if said second call signal includes said extra network dialing code, routing said call externally from said autonomous system to a destination determined by said extra network dialing code and said extension portion, or, if said second call signal does not include said extra network dialing code, said exchange further for routing said call internally within said autonomous system to a destination determined by said extension portion.

2. The autonomous system of claim 1 wherein said controller parses a portion of said called number in said first call signal to extract said extension portion to be compared with said plurality of extension numbers of said autonomous system and, further, if said controller determines that said call is directed externally from said autonomous system, includes said parsed portion and said extension portion in said second call signal.

3. A method for operating an autonomous system, wherein said autonomous system is coupled to a public switched telephone network (PSTN) having a public cellular system, and said autonomous system is capable of operation with a mobile terminal operable in both said autonomous system and in said public cellular system, said method comprising the steps of:

receiving, at a receiver, a call comprising a first call signal from the mobile terminal, said first call signal including a called number said called number including an extra-network dialing code and an extension portion;

comparing said extension portion of said called number with a plurality of extension numbers of said autonomous system to determine whether or not said extension portion is within said plurality of extension numbers;

and, if it is determined that said extension portion is within said plurality of extension numbers, forwarding said call within said autonomous system to a destination identified by said extension portion;

else,

if it is determined that said extension portion is not within said plurality of extension numbers, forwarding said call externally from said system to a destination identified by said extra network dialing code and said extension portion.

4. The method of claim 3, wherein said step of comparing comprises the step of parsing a portion of said called number in said first call signal to extract said extension portion to be compared with said plurality of extension numbers of said autonomous system.

5. The method of claim 4, wherein said step of forwarding said call externally comprises the steps of inserting said parsed portion of said called number in a second call signal and forwarding said call externally from said system to a destination identified by said second call signal.

6. The method of claim 4, wherein said step of forwarding said call within said autonomous system comprises the steps of:

generating a second call signal from said first call signal, said second call signal including said extension portion without said extra network dialing code of said called number; and

forwarding said call within said autonomous system to a destination identified by said second call siqnal.