RTS RTS ISDN 2002, Operator'S Manual

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PAGE 2-10 RTS ISDN 2002 System
2 I N T R O D U C T I O N
The RTS ISDN 2002 System incorporates two Audio codecs according to
G.711 and G.722 coding algorithms for bi-directional communication. The
coding delay of the 7-kHz G.722 coding algorithm is less than 10ms. The two
Audio codecs included in the system can be configured as 3.1-kHz (G.711) or
7-kHz (G.722) Audio codecs. Each coded Audio signal occupies a single
ISDN B channel (64-kbit/s channel). Therefore both codecs are using 2 B
channels of the S
o
interface. In the 7-kHz coding mode also a data signal can
be transmitted. Two different types of data interfaces are available. In the
G.711 Telephone mode the system detects the DTMF tones received from a
standard Telephone set and converts the tones into the Telex protocol for the
control of Matrix units. The system can be configured as 2 x G.711 Audio
codecs with two separate Audio interfaces but one common RS485 data in-
terface. In the 7-kHz (G.722) Audio codec mode a RS232 and a RS485 data
channel are available. These data channels can be used for the interconnec-
tion of a Matrix unit to a Trunkmaster system.