PBX Caller ID Synchronization via Speech Path Segmentation
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Solution Overview
Problem
Private branch exchange systems lack the capability to synchronize caller number notifications with incoming call signals, leading to delays and inefficiencies due to the need for storing caller numbers in large-scale devices controlled by multiple control blocks.
Innovation Solution
An analog circuit interface section connected to a public network receives incoming call signals and caller IDs, outputting presence information on a speech signal path, allowing the caller ID to flow through without storage, ensuring synchronization with incoming call signals without memory delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If caller numbers are stored in a large-scale device controlled by multiple control blocks, then the private branch exchange can notify extension telephone sets of caller numbers, but the incoming call signal cannot be synchronized with the stored caller numbers during transmission timing
Solution Approach 1:
The system is divided into two independent signal paths: a control signal path for incoming call signals and a speech signal path for caller ID information. This segmentation allows each path to process its signals independently without interference, eliminating synchronization delays caused by centralized storage and processing in large-scale devices.
Solution Approach 2:
The caller ID information is transmitted preliminarily through the speech signal path before the incoming call signal is fully processed. By preparing the caller ID information in advance and transmitting it through a dedicated path, the system ensures that the extension telephone set receives both signals simultaneously, resolving the synchronization issue.
2Reliability
If a dedicated modem and database are provided to notify extension telephone sets of caller numbers, then caller number notification is achieved, but the system complexity and device size increase significantly
Solution Approach 1:
The existing speech signal path in the private branch exchange, originally designed for voice communication, is utilized to transmit caller ID information. This multi-functional use of existing infrastructure eliminates the need for dedicated modems and databases, significantly reducing system complexity while maintaining caller number notification capability.
Solution Approach 2:
The private branch exchange uses its own internal speech signal path and control mechanisms to handle caller ID transmission, rather than relying on external dedicated devices. The system serves itself by leveraging existing resources, avoiding the addition of complex external equipment.
3Loss of information
If caller ID information is written into and read from memory, then the information can be stored and transmitted, but significant delay is caused by the writing and reading process
Solution Approach 1:
The caller ID information is extracted from the incoming signal and transmitted directly through the speech signal path without being written into memory for storage. By removing the memory storage step and transmitting the information in real-time through the dedicated path, the system eliminates memory access delays while still ensuring the information reaches the extension telephone set.
Data Source
AI summary
A caller number notification synchronized with an incoming signal is disclosed. An analog circuit interface section outputs incoming call signal presence information that shows whether to receive the incoming call signal that has the information indicated at a predetermined position on a highway and outputs the received caller ID to a speech signal path. An analog extension interface section detects the incoming call signal presence information on the highway, detects the caller ID on the speech signal path, generates an incoming call signal based on the detected incoming signal presence information and sends out the generated incoming call signal and the detected caller ID to the analog extension. A system control section connects the analog circuit interface section to the analog extension interface section.