The Telephone instantly displays incoming caller information, allowing you to identify who is calling before answering for a secure and efficient communication experience. Compact and portable design makes it easy to transport and use on the go, supporting convenient communication and line testing wherever you are. Conversation tracing and line checking functions enable quick identification and resolution of line issues, improving work efficiency for professional tasks. Designed for communication engineers and technicians, offering practical tools for line testing, fault diagnosis, and routine communication needs. Suitable for both professional settings and home use, covering line testing, fault diagnosis, and everyday calls with reliable performance. Use scenarios: Onsite telecom maintenance: perform line testing, trace conversations, and diagnose faults quickly in the field. Field installations: verify line integrity and monitor caller information to ensure smooth commissioning and troubleshooting. Office or home daily use: manage everyday calls with instant caller identification and builtin line testing when needed.