Technical data

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System Description
2 SYSTEM DESCRIPTION
The functional elements of the system are pictured in Fig. 2.
FIG. 2 FUNCTIONAL ELEMENTS OF THE B-LINE XT TELEPHONE HYBRID
2.1 Functionality
b-line XT incorporates two POTS interfaces, an ISDN interface and a LAN in-
terface. The operating mode can be set with the help of the Talkmaster XT
®
Software or the front keypad and display. In each operating mode two inde-
pendent telephone hybrids are available within one system (channel 1 and
channel 2).
The complete signal processing is taken over by a digital signal processor. In
this way the following functions are carried out:
– G.711 Audio encoding and decoding
–two independent Echo Cancellers for each line
–two independent AGCs (Automatic Gain Control)
–two independent Expanders
– control of the complete system (Keypad, Display, Relay, TTL, RS232,
LAN)