Replacing Strowger PABX's.
Giblin
P
P
Chester Health Authority.
D004739:England; D006747:Hospital Communication Systems; D008284:Maintenance and Engineering, Hospital / Q000458:organization & administration*; D009096:Multi-Institutional Systems / Q000458:organization & administration*; D010934:Planning Techniques; D013597:Systems Analysis; D013689:Telephone / Q000295:instrumentation*