Common use of First Call Clause in Contracts

First Call. The Contractor shall use commercially reasonable efforts to assist TerreStar to establish a voice and data call using the satellite chipset and the S-BSS communicating through the satellite using the 2000 – 2020 MHz and 2180 – 2200 MHz bands as soon as possible after access to the satellite in its orbital position is granted. The parameters of a voice and data call shall be defined by the end of CTS.