ND SatCom SKYWAN IDU 7000, Руководство пользователя

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2010-10-26 Network Design and Engineering Guide 125
Data Networking
SkyWAN
®
Frame Relay Networking Features
4.3 SkyWAN
®
Frame Relay Networking Features
On the serial user ports of the UIM board Sky WAN
®
IDU supports Frame Relay networking.
The IDU acts as a Frame Relay switch, providing a User-to-Network (UNI) or Network-to-Net-
work (NNI) service on these interfaces. Besides standard FR services according to the Frame
Relay Forum UNI and NNI standards,
Sky WAN
®
additionally supports the following features:
- FR multicast connections.
- Sky WAN
®
FAD service: Supports service differentiation over a single virtual circuit if a Sky-
WAN
®
FAD is connected to the serial interface.
- Isochronous FRAD service: Provides a bit transparent data service between IDU serial
ports in either a point-to-point or point-to-multipoint fashion. In this case, the Frame Relay
functionality is only used inside the
Sky WAN
®
network, for the connected devices it is just
a transparent serial data connection.
4.3.1 Serial port properties
Sky WAN
®
IDU 7000 / 2x70 have 4 serial frame relay ports on the UIM board. Some or all of
these ports may be activated, if their usage is included in the software license. The following
table 4-5 displays the possible port types.
Table 4-5 UIM Board FR Serial Port Types
The interface standard is defined by the selected cable type. Note that there are special cable
types available for a
Sky WAN
®
IDU-FAD connection.
Each port type supports port speeds 2.4, 4.8, 9.6, 19.2 and 38.4 Kbit/s. The port types X.21,
EIA-232 and V.35 support additionally port speeds of 48, 56, 64, 128, 192, 256, 384, 512, 768,
1024, 1636, 2048, 3072 and 6144 Kbit/s. Note that the port speeds 3072 and 6144 kbps are
not available for ports which are used for a isochronous FRAD service.
Each port can be configured for one of the following port types:
- FR-UNI: For connection to a Frame Relay Access Device like Sky WAN
®
FAD or a Rout-
er with a serial FR interface.
- FR-NNI: For connection to another FR switch to interconnect to a terrestrial FR network
or to another
Sky WAN
®
network.
- Isochronous FRAD: For connection to a device which does not support the Frame Relay
protocol but needs a transparent serial data connection.
Interface X.21 EIA-449 EIA-232 V.35
Procedural X.21 V.24 V.24 V.24
Functional X.24 V.24 V.24 V.24
Electrical X.27 V.36 (EIA-449) V.28 V.35
Mechanical
IDU DTE: male
IDU DCE: female
ISO 4903
15 pins
ISO 4902
37 Pins
ISO 2110
25 pins
ISO 2593
34 pins
Label DTE: W56
DCE: W57
DTE: W52
DCE: W53 DTE: W50
DCE: W51 DTE: W54
DCE: W55