Captioned Telephone Voice-Carry-Over Relay Service (CTRS) Secretarial Letter - Interim Service Letter. Dated August 19, 2005. Secretarial Letter - Implementing interim captioned telephone services. Dated May 25, 2005. Upgrade Information - Effective June 1, 2005. To obtain a CapTel Phone - Link to the CapTel website. Hamilton Telecommunications Website - Pennsylvania's captioned telephone administrator.