Hearing Carry-Over (HCO) is the ideal solution for you if you want to listen and type on your phone calls.  You type on your text telephone/teletypewriter (TTY) or VCO/HCO phone and the relay agent reads your words aloud to the other party.

This service is designed for people with Speech Disabilities.

This relay service is available in English-to-English and Spanish-to-Spanish.

The TRS Customer Profile allows you to store your relay call preferences and helps speed up call processing.

How Does Hearing Carry-Over (HCO) Relay Work?

It’s a cinch!

Just dial 711 (or 800-735-2964 for English or 866-479-7569 for Spanish) on your text telephone/teletypewriter (TTY) or VCO/HCO phone and the relay agent will answer with “Relay New Hampshire”.

Type the area code and telephone number you wish to call and type “GA” (“Go Ahead”).  The relay agent will dial the number and connect to the other party.

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    Type your message on your TTY or VCO/HCO phone to the relay agent.  Type “GA” (“Go Ahead”) at end of each message.  The “GA” indicates that it is the other party’s turn to respond.

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    The relay agent reads your typed message aloud to the other party.

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    The other party listens and speaks directly to you.  The other party says “Go Ahead” to indicate that it is your turn to respond.

To conclude the call, type “GA to SK” (“Stop Keying”) to indicate that you are ready to hang up.

Video: How does a Hearing Carry-Over (HCO) call work?

Here’s how an HCO user, Don, communicates with a standard phone user named Dennis at an auto shop.

Other HCO Features

Please specify to the relay agent the HCO call type you would like to make.


You, the HCO user, listen while the relay agent reads aloud the TTY user’s typed words.  You type directly to the TTY user.


The relay agent reads aloud both of the HCO users’ typed words.