The Packer and Murdoch family- backed telephone group One.Tel hit the wall yesterday as an administrator issued details of a $400 million cash shortfall and creditors began lining up to recover debts. With debts currently totalling about $180 million, major creditors including Lucent Technologies, Telstra and Optus have already staked their claims. Optus and Telstra have sought talks with the administrator, Mr Steve Sherman, from insolvency firm Ferrier Hodgson, while Lucent, which is building a $1.1 billion mobile phone network for One.Tel, said it was talking to advisers to determine the most appropriate course of action.