Daily Exchange MDF Jumpering Works at City, Central, Orchard, East, North, Paya Lebar, Bedok, Tampines, Changi, Geylang, Ang Mo Kio, Bukit Panjang, Jurong East, Telok Blangah & Ayer Rajah Telephone Exchanges for the period 1st April 2011 to 31st March 201 - Singtel