3.4 NETLINK PLUG-AND-PLAY
The NetLink Plug-and-Play application allows ISPs and PTTs to
quickly upgrade the link speed for a customer without re-configuring
the Customer Premise (CP) Model 1095. It will also allow ISPs and
PTTs to set up all of the configurations at the Central Office (on the
rack cards) before installation of the stand alone units, thus saving time
spent configuring and re-configuring DIP switch settings.
The NetLink Plug-and-Play feature allows the user to configure the
DTE rate for the link from the rack card at the Central Office (CO). The
stand alone unit at the Customer Premise (CP) site will automatically
configure itself to the DTE rate of the rack card. Other configuration
parameters fall to the default state. This allows changes in the configu-
ration to be handled from a single end of the link.
When installing a CO/CP style application, the local end of the link
is comprised of a CO unit (1095RC) set to either Internal or External
clocking mode and a CP unit (1095) set as a NetLink Plug-and-Play
CP.
The NetLink Plug-and-Play CP stand alone will have all of its
DIP switches set to the ON position (as indicated below in Figure 3).
When the units are connected, the CP will come up with a prede-
fined default configuration (Receive Recovered Clocking). During the
handshaking process between the units, the CO unit will set the DTE
rate/line rate of the CP unit to match its DIP switch configuration set-
tings. If the DTE rate for the link requires a change, the change is
needed only at the CO side of the link.
The NetLink Plug and Play application will also work in the man-
aged system using the Model 1001MC and 1095RC cards installed in
Patton’s 2U rack system. In this application, the system administrator
can configure the entire rack through the Network Management Station
(NMS) before the stand alone (CP) units are installed. For more infor-
mation on the SNMP management of your rack, please refer to the
Model 1001MC Operations Manual.
1095RC
(CO)
1095
(CP)
DIP Switches all in ON position
DIP Switches configured according
to specific application requirements
Figure 3. Typical NetLink Plug-and-Play Application
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4.0 INSTALLATION
Once the Model 1095 is properly configured, it is ready to connect
to the twisted pair interface, to the serial port, and to the power source.
This section tells you how to make these connections.
4.1 CONNECTING THE TWISTED PAIR INTERFACE
The Model 1095 supports communication between two DTE
devices at distances to 5 miles (8 km) over 24 AWG (.5mm) twisted
pair wire. There are two essential requirements for installing the Model
1095:
1. These units work in pairs. Both units at the end of the twisted
pair must have the same 2-Wire connection and DTE rate.
2.
To function properly, the Model 1095 needs one
twisted pair of metallic wire. This twisted pair must be
unconditioned, dry, metallic wire, between 19 (.9mm) and 26
AWG (.4mm) (the higher number gauges will limit distance).
Standard dial-up telephone circuits, or leased circuits that run
through signal equalization equipment, or standard, flat modu-
lar telephone type cable, are
not acceptable.
The RJ-45 connector on the Model 1095’s twisted pair interface is
polarity insensitive and is wired for a two-wire interface. The signal/pin
relationships are shown in Figure 4 below.
Figure 4. Model 1095 twisted pair line interface.
1 (N/C)
2 (N/C)
3 (N/C)
4 (2-Wire TIP)
5 (2-Wire RING)
6 (N/C)
7 (N/C)
8 (N/C)
1
2
3
4
5
6
7
8
