Comdial DXP Series Installing And Using page 16

IMI89–280
Arranging The Links
Remember, the network can be an intra-network joining several systems at a common site or an inter-network
joins several systems across a geographic area. Intra-network installations are on-site installations and use house
wiring; therefore, these installations do not require any service provider connections except for the CO line
terminations. With inter-network installations, nodes and hubs are separated by some geographic distance. In
these cases a service provider supplies the communication connections between the hub and the nodes, and these
connections must be T1.5 dedicated access lines for network use.
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for intra-network installations, make the two-pair, four-wire house wiring connections between the nodes and
the hub. In-house connections between the node and hub systems are per the schematic shown on the next
page:
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For inter-network installations, arrange with the service provider to supply the proper T1.5 links to the hub
and node sites. The DXNET or FXNET boards always use the 4ESS protocol (NET5 for E1 boards). Service
demarcation is at a network interface box (also known as a smart jack). In-house connections between the
demarcation point and the local system are per the schematic shown on the next page.
NOTE: Making arrangements for these connections involves discussions with the applicable service providers.
This is because there are economic considerations as well as technical details that vary from location to
location.
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At both the hub and nodes, locate the board slots where you plan to install the DXNET or FXNET boards,
and record those slots for later reference. At the hub, note which board slot is dedicated to which node and
record that information for later reference. Remember, several board slots at the hub may be dedicated to the
same node depending upon the number of links required to handle the call traffic.
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Determine all the extension numbers for each node and the hub, and determine which extension numbers are
to be accessible through the network.
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Isolate the link channels from any CO lines that the systems may include, and gather those link channels into
their own line group. Record this arrangement for later reference.
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Determine which node is to be node 1, node 2, node 3, and so forth then name each node. Record the location
and name of each node for later reference
16 — Installing System-To-System Networking
Installing And Using System-To-System Networking