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2
S Y S T E M D E S C R I P T I O N
The functional elements of the system are pictured in Fig. 2.
FIG. 2
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)
FUNCTIONAL ELEMENTS OF THE B-LINE XT TELEPHONE HYBRID
S y s t e m
D e s c r i p t i o n
P A G E 1 7
®
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