Patton electronic 1095 user manual Netlink PLUG-AND-PLAY, Connecting the Twisted Pair Interface

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).

			1095
	1095RC
	(CO)		(CP)
DIP Switches configured according		DIP Switches all in ON position
to specific application requirements

Figure 3. Typical NetLink Plug-and-Play Application

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.

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.

	1	(N/C)
1	2	(N/C)
	3	(N/C)
2
3	4	(2-Wire TIP)
4

55 (2-Wire RING)

6	6 (N/C)
7
8	7 (N/C)

8 (N/C)

Figure 4. Model 1095 twisted pair line interface.

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