00727nam a22002177a 4500 SNU 20140728222127.0 140728b xxu||||| |||| 00| 0 eng d 9781578200412 HCL 621.382 PET Peterson, Kerstin Day Business telecom systems : a guide to choosing the best technologies and services / Kerstin Day Peterson New York, NY CMP Books 2000 442 p. 23 cm. Kerstin Day Peterson Business telecom systems : a guide to choosing the best technologies and services Telecommunication systems -- Planning. Digital telephone systems. ddc HCL 20486 20486 1 0 ddc 0 0 SNUL SNUL 2014-07-28 0 621.382 PET H8040 2014-07-28 00:00:00 2014-07-28 HCL