Overlap Dialing for Integrated Access Devices
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Solution Overview
Problem
The existing methods for establishing connections between integrated access devices and telecommunications networks, particularly in VoIP-based telephony, suffer from delays due to the need for a timer interval after entering the last character of a subscriber identification number, leading to unnecessary wait times and user discomfort.
Innovation Solution
The method employs overlap dialing with a memory area storing subscriber identification numbers, allowing for immediate connection setup if the entered number matches a stored number, and waiting for additional characters if not, thereby eliminating the need for a timer interval in most cases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a timer interval is used to check whether additional characters will be entered, then the system can ensure complete subscriber identification numbers are entered, but call setup time is increased due to the mandatory wait period
Solution Approach 1:
The system pre-loads frequently dialed subscriber identification numbers into a memory area before they are actually needed. When a user dials, the system immediately checks if the entered number matches any pre-loaded numbers, eliminating the need to wait for the timer interval to expire before initiating call setup for matching numbers.
Solution Approach 2:
Instead of waiting for the complete timer interval to expire before any call setup, the system performs partial action by initiating call setup immediately for numbers that match the pre-loaded subset, while still allowing the timer to expire for numbers that don't match, thus optimizing the average call setup time.
2Reliability
If the system waits for the timer interval to expire before initiating call setup, then it avoids premature connection attempts, but user convenience is reduced due to the noticeable delay
Solution Approach 1:
By pre-loading frequently dialed numbers into memory, the system prepares these numbers in advance so that when users dial them, the system can immediately recognize and initiate call setup without waiting for the timer interval, thereby improving user convenience while maintaining reliability for non-matching numbers.
3Productivity
If the system uses en-bloc dialing with full number transmission, then connection setup can be initiated immediately upon receiving the complete number, but the system cannot detect incomplete numbers without a timer interval
Solution Approach 1:
The system pre-loads complete subscriber identification numbers into a memory area in advance. When a user dials, the system immediately compares the entered number against the pre-loaded complete numbers, allowing it to detect completeness without needing to wait for a timer interval, thus maintaining both speed and reliability.
Data Source
Figure 1~3
AI summary
A method is described for establishing a connection between an integrated access device (IAD) and the telecommunications network via an access node of the telecommunications network, using a telecommunications terminal device connected to the IAD via an analog or digital interface, wherein a plurality of stored subscriber identification numbers are stored in a memory area. The method comprises the following steps: -- Transmission of an entered subscriber identification number consisting of a plurality of characters to the integrated access device -- Comparison of the entered subscriber identification number with stored subscriber identification numbers - Establishment of the connection between the integrated access device and the telecommunications network by transmitting one of the plurality of stored subscriber identification numbers.