Perle Systems IOLINK-PRO IOLINK-520 - Manual (Page 24)

ISDN Connection Management
IOLINK-PRO & 520 Reference Manual — 2. 3
Address Connect
An Address Connect connection is an ISDN connection that is established to a specific destination IOLINK
router dependent upon the destination network address contained within traffic received from the local LAN.
When a device on the local LAN wishes to establish a session with a device on a remote LAN, the local device
will send a frame with a destination address of the remote device. The IOLINK router will receive the frame
and examine the destination network address contained within the frame.
If the IOLINK router can determine the route to the destination network address, the frame is passed along to
one of the currently connected partner IOLINK router. If the destination network is not located on a currently
connected partner IOLINK router, the local IOLINK router will then look in the Address Connect table to
determine which partner IOLINK router to call.
The Address Connect tables are used by the IOLINK router to determine which remote IOLINK router is
called when a specific destination network address is requested from a device on the local LAN. The Address
Connect tables are configured by the IOLINK router operator.
555-1000
555-8000
The ISDN connection is made
to the appropriate remote network
according to the entries in the
Address Connect table.
Network B
Network H
Network A
555-2000
ISDN Network
Remote Network
Network B
Network C
Network D
Network E
Network F
Network G
Network H
555-2000
555-3000
555-4000
555-5000
555-6000
555-7000
555-8000
ISDN Number
Networks C through G
Figure 2 - 2 Address Connect WAN Topology
Manual Call
A manual call is simply an operator initiated ISDN call to a remote partner IOLINK router. The ISDN number
is entered by the operator and a call is made.