The Siemens TIEL, part code S30810-Q2520-X, is in stock and available from Office Phone Shop.
The TIEL is designed to work in the Hipath 3750 system.
Office Phone Shop provide a warranty with every business telephone and part sold.
We stock 1000s of telephone system spares and parts in our UK warehouse. Please quote Siemens TIEL or part code S30810-Q2520-X when ordering.