Study course for controlling officers examination: technical paper : telephone section 3
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Contents: traffic and trunking / traffic and trunking (continued) / circuit principles and common circuit elements / circuit principles and common circuit elements (continued) / circuit principles and common circuit elements (continued) / the 2000-type step-by-step exchange system / 2000-type step-by-step exchange system (continued) / the rotary system / the rotary system (continued) / interworking equipment / other automatic telephone systems / special services; UAX; PABX; line connectors / AC signalling / maintenance methods
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