Your OnSIP Hosted PBX Account comes with a few pre-built extensions, one of which is to reach a Relay Services operator to facilitate communication to or from TTY users. For this number we use NY Relay Services.
OnSIP organizations have a '711' extension for this relay service. If the '711' extension is not available, the relay extension may be provisioned as either '*711' or '7711'. Please check the Resources page in the Admin Portal to see if a prefixed extension is required for your organization.