Verilink PRISM 3000 (34-00184) Product Manual - Manual (Page 14)

PRISM 3000 2-4 Installation
station clock is commonly available as a 64 kHz, bipolar
RTZ signal referred to as a ‘composite clock’.
The unit will also accept any unframed all ones bipolar RTZ
signal with a level of 1.5 to 4 volts peak and a frequency of
1.544 MHz or any multiple of 56 or 64 kHz. An RS422 /423
compatible station clock input, with the same range of input
frequencies, is also available as an option.
The station timing is configured through the front panel
(refer to
Section 3.3 on page 3-3 ) or through the terminal
interface (refer to Section 4.6.1 on page 4-7 ). Pin utilization
of the RJ11 (6 x4) connector is shown in the following table.
2.10 Network Management
The PRISM unit is fully compatible with TxPORT’s ele-
ment manager, the EM8000. The EM8000 software system
can be used to manage small to large networks of TxPORT
network access products.
An element is accessed by using an RS232 connection from
the serial port of the computer running the EM8000 program
to the unit’s ‘SUPV’ or the ‘NMS’ ports. The Ethernet (or
Token Ring) SNMP port in Slot 1 may also be used for net-
work management. The different connection methods are
described in the following paragraphs.
2.10.1 NMS Connection
The two 6 -pin modular connectors labeled ‘NMS IN’ and
‘NMS OUT’ on the rear panel may be used for connection
to the EM8000. This port is configured in this manner to
allow the connection of multiple collocated units in a daisy
chain IN/OUT bus arrangement as shown in
Figure 2-2 .
The OUT port of one element is connected to the IN port of
the next element, and so on, to form a complete chain
among the group of elements.
NOTE: All units on the same NMS chain must use the
same NMS bit rate.
Figure 2-2 NMS Daisy-Chain Arrangement
The ‘NMS IN’ connector provides both the transmit and
receive signal pair. This port may be used for a modem con-
nection or as a VT100 terminal interface (refer to the ‘Ter-
minal Operation’ chapter).
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. See
Section 1.6 on page 1-5 for ordering information.
The NMS address, NMS bit rate, and boot configuration
mode is set by the front control panel as described in
Sec-
tion 3.8 on page 3 -10 . The physical connection of the NMS
port is a 6-pin modular connector with the pinout shown in
the following table. This is a serial RS232 DCE port config-
ured for 8 bits, no parity, and 1 stop bit.
2.10.2 Supervisory Port Connection
The rear panel ‘SUPV’ port serves several functions. The
terminal interface program may be accessed through this
port (refer to
Figure 2-3 on page 2-5 ). A modem may be
connected to this port for remote access or use of the call on
alarm feature (refer to
Figure 2-4 on page 2-5 ).
For cabling convenience, The EM8000 workstation may be
directly connected to the supervisory port. When a group of
Pin TTL Signal Bipolar Signal
1 Ground Ground
2 Not Used Not Used
3 TTL Clock Balanced Tip
4 Ground Balanced Ring
5 Not Used Not Used
6 Ground Ground
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
IN OUT NMS
IN OUT NMS
Element #1
Element #2
OUT IN NMS EM8000
IN OUT NMS Last Element