2010-10-26 Network Design and Engineering Guide 125Data NetworkingSkyWAN® Frame Relay Networking Features4.3 SkyWAN® Frame Relay Networking FeaturesOn the serial user ports of the UIM board SkyWAN® 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 FrameRelay Forum UNI and NNI standards, SkyWAN® additionally supports the following features:- FR multicast connections.- SkyWAN® 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 serialports in either a point-to-point or point-to-multipoint fashion. In this case, the Frame Relayfunctionality is only used inside the SkyWAN® network, for the connected devices it is justa transparent serial data connection.4.3.1 Serial port propertiesSkyWAN ® IDU 7000 / 2x70 have 4 serial frame relay ports on the UIM board. Some or all ofthese ports may be activated, if their usage is included in the software license. The followingtable 4-5 displays the possible port types.Table 4-5 UIM Board FR Serial Port TypesThe interface standard is defined by the selected cable type. Note that there are special cabletypes available for a SkyWAN® 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 arenot 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 SkyWAN® FAD or a Rout-er with a serial FR interface.- FR-NNI: For connection to another FR switch to interconnect to a terrestrial FR networkor to another SkyWAN ® network.- Isochronous FRAD: For connection to a device which does not support the Frame Relayprotocol but needs a transparent serial data connection.Interface X.21 EIA-449 EIA-232 V.35Procedural X.21 V.24 V.24 V.24Functional X.24 V.24 V.24 V.24Electrical X.27 V.36 (EIA-449) V.28 V.35MechanicalIDU DTE: maleIDU DCE: femaleISO 490315 pinsISO 490237 PinsISO 211025 pinsISO 259334 pinsLabel DTE: W56DCE: W57DTE: W52DCE: W53DTE: W50DCE: W51DTE: W54DCE: W55
