Eicon Networks 1530 manual PVC Permanent Virtual Circuits

Protocol Menu (VHSI Tree) > Virtual Circuits Group (when protocol is set to X.25)

These parameters are only available when the protocol is set to X.25.

PVC - Permanent Virtual Circuits

Defines settings for PVCs (Permanent Virtual Circuits). A PVC is permanently established between two destinations. No call setup is required.

IVC - Incoming Virtual Circuits

Defines settings for IVCs (Incoming Virtual Circuits). An IVC can only receive calls.

TVC - Two-way Virtual Circuits

Defines the settings for TVCs (Two-way Virtual Circuits). A TVC can both make and receive calls.

OVC - Outgoing Virtual Circuits

Defines the settings for OVCs (Outgoing-only Virtual Circuits). An OVC can only issue calls and not receive them.

Sequential Assignment of VCs

Enables/disables sequential assignment of virtual circuits. Most X.25 networks assign virtual circuits sequentially. However, some networks, such as British Telecom's Packet Switch Stream, assign virtual circuits non-sequentially using Logical Channel Group numbers. If this is the case, you must define the starting LCN (Logical Channel Number) for each group of virtual circuits (PVC, IVC, TVO, and OVC).

Default: Enabled.

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