These usually require a battery. Ask about this type of accessory at your service provider s store. Inc. Ericsson has an accessory that looks just like a wireline telephone handset. You plug its cable into the Ericsson wireless phone and place the handset on the acoustic cups of any TTY that has cups. This is one way you can use a TTY that does not have audio outlets on it.
Many service providers offer analog service.
Service providers branded retail outlets are probably your best choice for information because you can show the personnel pictures of the TTY or the TTY itself, as well as this article, so that they can better serve you. We have placed a number of test calls through relay services to service providers telephone sales numbers. We found that telephone sales personnel very rarely know about TTY compatibility. Be sure to ask how much each call will cost in addition to the monthly rate, whether there is a penalty for early cancellation of your subscription, and whether there are additional calls for roaming traveling out of your local area. You should ask your service provider about coverage areas in which you can use your phone.