This Circular Letter introduces NSI Technical Bulletin No. 0061 which provides information concerning the performance expected of NSI NACOSS Gold, Fire Gold, Systems Silver and Fire Silver approved companies relating to preparation of the PSTN to ALL IP communications network migration. The Technical Bulletin gives background information on the PSTN – ALL IP migration and its impact, the timeline for completion of the rollout and mandatory preparatory actions to be completed by approved companies. Questions or queries? If you have any questions regarding Technical Bulletin 0061, please do not hesitate to contact me.