5502

**5502** is a designation used in various contexts, primarily within telecommunications and military systems, though it can also appear in other technical or historical references. In telecommunications, **5502** is a specific code related to the **5500 series of modems**, a line of analog modems developed by companies like **3Com** and **Hayes Microcomputer Products**. These modems were widely used in the late 20th century for dial-up internet connections, particularly in environments where digital modems were not yet standard. The **5502** variant was often configured for specific communication protocols, including **V.32bis**, which improved data transfer speeds over traditional analog lines.

In military and aerospace applications, **5502** has been referenced in older documentation, particularly in connection with **AN/USQ-153** systems, which were part of the U.S. Navy’s early satellite communication networks. These systems were designed for secure, high-speed data transmission and were used during the Cold War era. The designation may also appear in vintage aviation or radar equipment, where specific models or components were labeled with such codes for identification and maintenance purposes.

Beyond telecommunications, **5502** has been referenced in niche historical or industrial contexts, such as older manufacturing standards or specific regulatory codes. However, its exact application in these areas is less documented and may vary by region or industry. For precise technical or historical inquiries, consulting specialized archives or manufacturer records is recommended.