Alcatel Speed Touch 591s, Техническое руководство пользователя, Страница: 30 / 184

2 — Features and typical applications
2-2 Speed Touch 591s Technical Practices
90-8785-01 February 2001
2.1 Frame relay
The frame relay Speed Touch 591s provides the following key features:
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support for SHDSL payload rates of 192, 384, 512, 768, 1024, 1152, 1536, 2048,
and 2304 kb/s
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frame relay UNI, PVC support
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frame relay QoS, providing four service categories:
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real time
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low delay
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committed throughput
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best effort
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frame-relay-to-ATM network interworking, allowing two frame relay devices to
be connected over an ATM network with guaranteed quality of service over the
entire line (see Figure 2-1)
•
frame-relay-to-ATM service interworking, allowing a frame relay device to be
connected to an ATM device over an ATM network (see Figure 2-2)
•
frame forwarding, allowing the system to support packet-oriented protocols such
as X.25 and PPP, which use HDLC-based packets, and to transport them across
an ATM network (see Figure 2-3)
Figure 2-1 Network interworking
ATM
network
ST591s
ST591s
SHDSL
SHDSL
T1/FR
Frame relay
user
Frame relay
user
Frame relay
user
15105
7350 ASAM
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H
D
S
L
7350 ASAM
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H
D
S
L
7350 ASAM
F
R