(ShareCast News) - Data communications outfit Avanti said it had signed its first pre-launch contract for capacity on the HYLAS 4 satellite.Avanti said it will supply Bentley Walker, one of its key existing customers, with capacity on HYLAS 4 across Sub-Saharan Africa in a $1m commitment.HYLAS 4 is on-track to be launched in the first quarter of 2017 and will complete Avanti's coverage of Europe, Africa and the Middle East, the company said in a statement.