ADC Kentrox ISDN NT1 1010 Dokumentacja Strona 104

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2-50
Reference Guide
Model No.
Running Head
Low-Bit Rate Voice Server Applications
2.11.1 Call Center Application
In the application shown in Figure 2-31, customer calls originating from the PSTN are
compressed by the LBRV server for efficient transmission on the leased E1 trunk. up to Up to
three LBRV servers are used per IAD to compress up to 192 voice channels from the PSTN
on to the E1 link and still leave 128Kbps bandwidth for data traffic from a router. A Frame
Relay server is used in the IADs’ at the hub locations to send voice and data traffic on the
leased E1 trunk.
Figure 2-31. LBRV in a Call Center Application
E1
HSU
FRS
E1 link = 8 T1 + 128K (Routers)
T1
T1
T1
T1
T1
T1
FRS
HSU
1852 k
128 k
E1Leased
Line
2X64K
PSTN
PABX
T1
T1
T1
T1
T1
T1
T1
T1
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
3LBRV
T1
T1
2X64K
Router Router
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