TRANSMIT LEVEL. CCA for analog telephone connection" is a transmission route with analog a/b interfaces. Within the dynamic range of the A-coding law according to ITU-T recommendation G.711 [9], any level can be transmitted. A relative level of +3.14 is assigned to the load capacity. A test signal according to ITU-T recommendation G.711 [9] generates an absolute power level of 0 dBm after D/A conversion. To ensure assignment of transmit signals to terminal equipment, the specifications for network access are given hereafter.
2.5.1 TRANSMIT LEVEL AT NETWORK ACCESS In communication state, a useful signal within the frequency range from 300 Hz to 3400 Hz can be transmitted through Carrier Customer Access - Analog. The dynamic range at the network access is ca 60 dB. As the effect of useful signals and disturbing signals reaching the transmission route input depends on the type of signal (voice signal, single frequencies i.a.), such signals can be classified into various categories. Terminal equipment is subdivided in various, reciprocally non-exclusive categories to avoid negative interference on transmission route by useful and disturbing signals. "Access to the subscriber's line" A type of terminal equipment may well appear in more than one category. For the purpose of this "Technical description", a general subdivision is defined according to the following definition:
a) terminal equipment whose output signals come from an integrated acoustic/electric converter in real time (see section 2.5.2);
b) terminal equipment whose output signals are generated electrically within the terminal (see section 2.5.3);
c) circuit-switching terminal equipment whose output signals come from another electric interface (see section 2.5.
