Verilink PRISM 3001 (34-00186) Product Manual User Manual
Page 25
NMS Connection
2-11
All units on the same NMS chain must use the same NMS bit rate.
NMS
Split Cable
The EM8000 may be connected directly into the NMS chain between two elements
if connection to the SUPV port is not desirable. A Y-cable is used from the
EM8000 serial port which splits the transmit and receive signals into two 6-pin
modular connectors for the NMS IN and NMS OUT ports. Ordering information
for this cable is found in Table 1-2 on page 1-8.
NMS IN
Only
The NMS IN connector provides both the transmit and receive signal pair. This
port may be used for a modem connection or as a VT100 terminal interface
(explained in the Terminal Operation chapter).
Chassis
Operation
EM8000 and 8100A operation in the 12- slot chassis is similar to operation with
the stand-alone unit with the exception that all elements are already chained
together in the chassis. The front panel SUPV and the rear panel NMS ports
operate in the same fashion.
The NMS address, port bit rate, and power up configuration mode can be set only
by the configuration switches. The physical connection is a 6-pin modular
connector with the following pinout. This port is a serial RS-232 DCE port
configured for 8 bits, no parity, and 1 stop bit.
IN
OUT
NMS
IN
OUT
NMS
Element #1
Element #2
OUT IN/OUT
NMS
EM8000
or 8100A
IN
OUT
NMS
Last Element
Figure 2-7
NMS Daisy-Chain Arrangement
Table 2-10 NMS Pinout
Pin
NMS Bus IN
NMS Bus OUT
1
Not Used
Not Used
2
Signal Ground
Signal Ground
3
Data Out
Data Out
4
Data In
Not Used
5
Signal Ground
Signal Ground
6
Not Used
Not Used