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Voice Carry Over (VCO) relay services are designed to enable individuals who are hard of hearing or deaf to communicate effectively over the telephone while using their own voice. A key feature of these services is that users can speak directly to the person they are calling while the Communication Assistant (CA) types out the responses to ensure clear communication.

This process allows the user to use their voice without needing to rely solely on typing for all communication, which can be cumbersome and slow. Instead, the user can utilize their vocal capabilities to express themselves, while still having the benefit of typed responses from the CA to facilitate the conversation. Overall, VCO relay services are tailored to enhance the communication experience for those with hearing impairments, offering a more fluid interaction than traditional relay services that might require all communication to be typed.

Other options focus on features that are not accurate representations of VCO services. For example, typing is not mandatory for users through VCO since they can speak directly. Additionally, VCO does not require specialized telecoils nor does it limit itself only to TTY devices, which are primarily used in traditional text telephone relay systems. This flexibility makes VCO an attractive choice for users who want to communicate using their voice while still receiving the support