Case Studies PBX Case Study: Nothing But Padlocks Nothing But Padlocks are the only specialist of padlocks in the UK and Europe. Nothing But Padlocks wanted some way of filtering those with question of existing orders from those who needed technical advice for new orders. With LazyPBX Nothing But Padlocks got all this for less cost than BT’s Featureline and hugely less than an in-house system operated by their own hardware.