# CAS - Channel Associated Signaling SS5 - On CCS type of channel the signaling traffic is carried with voice path. totally insecure, can be manipulated injecting tons inside the channel. Analog, T1 RBS, E1 R2 #### CAS - Channel Associated Signaling Channel Associated Signaling (CAS) is a method used in telecommunications where signaling information is conveyed within the same channel as the voice or data. This is achieved by using specific bits in the data stream to carry signaling information such as on-hook, off-hook, and dialed digits. In CAS, each telephone circuit has its own associated signaling, which can lead to inefficiencies and increased complexity compared to other signaling methods like Common Channel Signaling (CCS). CAS is typically used in analog networks, T1 Robbed Bit Signaling (RBS), and E1 R2 systems. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ss7.learn-telecom.com/history/cas-channel-associated-signaling.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.