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Installation 2-52048 PMU/NTU

2.6 Equipment Connection

The equipment physical interface for both the stand-alone

unit and the chassis mounted unit is a standard RJ48C 8-pin

modular jack. A DB15 backplane is also an option for the

equipment interface. The pinout assignments are as follows:

NOTE: For 75 ¾ DB15 operation, the following pins

must be connected together: pins 2 & 9; pins 4 & 11.

For 120 ¾, leave as specified.

2.7 Network Connection

The network physical interface for both the stand-alone unit

and the chassis mounted unit is a standard RJ48C 8-pin

modular jack. A DB15 backplane is also an option for the

network interface. The pinout assignments are shown in the

following table.

2.8 Network Management

The 2048 PMU provides several means for user interface.

Using the configuration switch settings described in Section

2.5, the PMU may be configured and operated without fur-

ther interface. However, this mode does not allow access to

many of the capabilities of the unit.

For full software control and access to information, the

PMU has 3 ports which provide management functions

(SUPV, USER, and PTT ports). These ports may be used

for a VT100 terminal interface or for an EM8000 network

manager interface.

An element may be accessed by using an RS232 connection

from the serial port of the computer running the EM8000

program to the element’s SUPV, USER, or PTT ports.

These ports are described in the following paragraphs.

2.8.1 Supervisory Port

The front panel ‘SUPV’ port serves several functions. A

modem may be connected to this port for remote access or

use of the COA (call on alarm) feature. A computer con-

nected to the SUPV port can access the embedded ‘terminal

interface’ firmware for PMU software control (refer to the

‘Terminal Operations’ chapter).

For cabling convenience, the EM8000 element manager

may be directly connected to the ‘SUPV’ port. When a

group of elements is connected in an NMS chain, the

EM8000 may be connected to the supervisory port of any

one of the elements. This element can then route messages

onto the NMS chain to reach the other elements. Refer to

Section 2.8.2 for more information on the EM8000.

The SUPV port is an independent serial interface into the

unit and connecting to it does not interrupt NMS port traffic.

Pin RJ48 Interface Pin DB15 Interface

1 Data Out 1 Data In

2 Data Out 2 Frame Ground

3/6 Not Used 3 Data Out

4 Data In 4 Frame Ground

5 Data In 9 Data In

7/8 Chassis Ground 11 Data Out

Pin RJ48 Interface Pin DB15 Interface

1 Data In 1 Data Out

2 Data In 2 Not Used

3/6 Not Used 3 Data In

4 Data Out 4 Not Used

5 Data Out 9 Data Out

7/8 Chassis Ground 11 Data In

OUT

USER

123456

OUT

PTT

EQPT

NET

Power/Alarm

Figure 2-2 2048 Rear Panel with DB15 Connector

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 32 33

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