вот на другом форуме помогли
$conn_SRV = array();
$conn_SRV[] = sybase_connect ('SRV1', 'user', 'pass') or die ('Could not connect');
$conn_SRV[] = sybase_connect ('SRV2', 'user', 'pass') or die ('Could not connect');
foreach($conn_SRV as $conn)
{
$result = sybase_query('exec proc', $conn);
while ($data = sybase_fetch_assoc($result))
{
}
}