EVS is primarily used in mobile communications to provide improved voice quality and more efficient use of network resources. 

• Enhanced Voice Quality: EVS codec, designed for LTE (Long-Term Evolution) networks, offers superior voice quality compared to previous technologies. This enhanced clarity can be crucial in emergency situations where clear communication is vital.

• Efficient Use of Bandwidth: EVS is more efficient in terms of bandwidth usage, which is beneficial for congested mobile networks, especially during emergencies when network traffic can spike.

• Improved Call Reliability: The advanced technology used in EVS can lead to improved reliability in voice call connections, reducing the likelihood of dropped calls during critical communications like 911 calls.

• Compatibility with LTE Networks: As LTE networks continue to expand and replace older mobile technologies, the use of EVS for 911 call routing becomes increasingly relevant, offering a more robust and reliable platform for emergency communications.

• Potential Integration with Next Generation 911 (NG911): EVS 911 call routing could be integrated with NG911 systems, which aim to modernize emergency services infrastructure by enabling multimedia communications.

While EVS 911 call routing is a more technical and specific aspect of emergency telecommunications, the core benefit lies in its potential to enhance the clarity and reliability of critical emergency communications.