Perle Systems IOLINK-520 - Manual (Page 40)

Applications
2.20 — IOLINK-520 & IOLINK-PRO Installation & Applications Guide
2.2.2 - Basic Frame Relay Configuration
North American IOLINK-520 & IOLINK-PRO with at least one non-ISDN interface are
configured to have frame relay enabled for that interface by default. IOLINK-520 &
IOLINK-PRO shipped outside of North America with at least one non-ISDN interface will
have frame relay disabled on that interface as a default setting. See the following page for
instructions on switching Frame relay from disabled to enabled.
If the IOLINK-520 or IOLINK-PRO is configured as a frame relay router, it will
communicate over WAN connections to other Frame Relay units via Frame Relay
Permanent Virtual Circuits (PVC). From 1 to 128 PVC’s may be defined to connect to
other frame relay units. Before the IOLINK-520 or IOLINK-PRO can establish a PVC
connection to another frame relay router, at least one PVC must be defined. The IOLINK
router is pre-configured to query the frame relay service to auto-learn the required
parameters; they may also be set manually.
The DLCI (Data Link Connection Identifier) number for the PVC is assigned by the frame
relay service provider. The PVC must be defined on at least one physical links on the
IOLINK router. Refer to the following diagram that shows three IOLINK router units
connected together with two PVCs being configured on each unit. The configuration of the
PVCs within the frame relay cloud is controlled by the frame relay service provider.
Figure 2 -8 Frame Relay configuration
Frame Relay PVC
WAN connections
DLCI numbers
assigned for these
PVCs from the
frame relay provider.
50
51
52
53
54 55