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NCM Installation  PN 51533:A1  03/27/03

3

2.2  Interconnecting the NCM-F 

When connecting consecutive nodes/repeaters, note that fiber cable must exit one board on transmit 
(TX) and enter the next node/repeater on receive (RX).  Also, note that the fiber-optic pair (RX, TX) 
from port A of one Node/Repeater may be connected to either Port A or Port B of another node/repeater 
(refer to Figure 5).  An NCM-F may be connected to any of the following devices:

• MIB-F
• MIB-WF
• NAM-232F
• Another NCM-F
• Network connection for NCS-F
• RPT-F
• RPT-WF

For information regarding these devices, refer to the NAM-232 and Repeater manuals listed in 
Table 4 “Supplemental Documentation”.

Note: 

See the 

NOTI•FIRE•NET™

 Manual (Network Version 4.0 and Higher)

 for maximum fiber-

optic cable attenuation.

Figure 5  NCM-F Connection

Table 2  

NOTI•FIRE•NET™

 Connections: NCM-F

2.3  Mixing Wire & Fiber on One Network 

In some networks, it may be necessary to mix twisted-pair wire and fiber-optic cable.  There are two 
solutions for this situation.

1. In any network, an RPT-WF may be used as an interface between wire and fiber.  

2. In a network that uses an AFP1010 or AM2020, a MIB-WF may also be used as the interface 

between wire and fiber.

See 1.2 “The Network Communications Module for Fiber (NCM-F)” for requirements and restrictions 
on the use of fiber optic cable.  See the 

NOTI•FIRE•NET™

 Manual (Network Version 4.0 and 

Higher) 

for a discussion of all compatible configurations.

J200

CH A 

Transmit

J201

CH A 

Receive

J202

CH B

Transmit

J203

CH B

Receive

RxB

TxA

TxB RxA

TX

TX

J203

RX

RX

J2

0

2

J2

0

1

J2

0

0

TX

TX

J203

RX

RX

J2

0

2

J2

0

1

J2

0

0

NC

M-f

-co

nn

ex.

cd

r

RxB

TxA

TxB RxA

Channel 

B

Channel 

A

Channel 

A

Channel 

B

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