Nortel Networks Network Card 893 862 B User Manual

Using the BayStack  
Ethernet Fiber Media  
Adapters  
Bay Networks, Inc. Corporate Headquarters  
4401 Great America Parkway  
Santa Clara, CA 95054  
8 Federal Street  
Billerica, MA 01821  
March 1996  
*893-862-B*  
 
Introduction  
This guide describes the Bay Networks 10BASE-FL (fiber link)  
and single-mode fiber media adapters for the BayStack  
10BASE-T Hubs, and provides instructions for installing,  
connecting, and configuring the adapters in the hub.  
Each BayStack fiber media adapter provides one nonredundant  
single- or multimode fiber port for flexible backbone  
connectivity to your BayStack 10BASE-T Hub. Both adapters  
employ 10BASE-FL signaling technology.  
The BayStack 10BASE-T Hub provides two Media Adapter  
LEDs to indicate the status of the hub media adapter ports A and  
B. For more information about interpreting media adapter LEDs,  
refer to Chapter 1, “Quick Reference Information,” in Using the  
BayStack 10BASE-T Hubs.  
This guide contains the following sections:  
BayStack 10BASE-FL Media Adapter  
BayStack Single Mode Fiber Media Adapter  
Fiber Optic Cable Length Limitations  
Installing a Media Adapter in a BayStack Hub  
For more information about how the media adapter operates in  
the hub, refer to Using the BayStack 10BASE-T Hubs (Bay  
Networks Part number 893-839-B).  
893-862-B  
1
 
BayStack 10BASE-FL Media Adapter  
The BayStack 10BASE-FL Media Adapter is a modular  
10BASE-FL fiber link port. It is designed to be installed in either  
media adapter slot of a BayStack 10BASE-T Hub.  
The port is compatible with the IEEE 802.3 10BASE-FL  
specification for Ethernet running over 62.5/125 µm or 50/125  
µm multimode fiber optic cable.  
TX  
RX  
10BASE-FL  
5956  
Connection is made to the port using two straight-tip (ST)  
connectors (Tx and Rx).  
For more information about multimode fiber optic cable  
connection and limitations, see “Fiber Optic Cable Length  
Limitations” later in this guide.  
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893-862-B  
 
BayStack Single Mode Fiber Media Adapter  
The BayStack Single Mode Fiber Media Adapter is a modular  
port supporting 10BASE-F signaling. It is designed to be  
installed in the media adapter slot of any BayStack 10BASE-T  
Hub.  
The port conforms to Bay Networks proprietary standards for  
Ethernet running over 9/125 µm single-mode fiber optic cable.  
No IEEE or other international standards exist for this  
configuration at this time.  
TX  
RX  
Single Mode Fiber  
6770  
Connection is made to the port using two straight-tip (ST)  
connectors (Tx and Rx).  
For more information about single-mode fiber optic cable  
connection and limitations, see “Fiber Optic Cable Length  
Limitations” next in this guide.  
893-862-B  
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Fiber Optic Cable Length Limitations  
The 10BASE-F standard permits you to use fiber optic cables up  
to 2000 meters long. However, the fiber connection must meet:  
Optical power budget  
Ethernet repeater rules  
For more information about simple rules for Ethernet network  
compliance, refer to Using the BayStack 10BASE-T Hubs.  
BayStack 10BASE-FL Media Adapter  
The optical power budget for the 10BASE-FL media adapter is  
shown in Table 1. Power loss in the link cannot exceed the value  
for the type of fiber optic cable you are using.  
Table 1. 10BASE-FL Optical power budget  
Parameter  
62.5/125 µm  
–20.0 dBm  
–32.5 dBm  
12.5 dB  
50/125 µm  
–25.7 dBm  
–32.5 dBm  
6.8 dB  
Transmitted power (average)  
Receiver sensitivity (average)  
Optical power budget  
Only in-line fiber-to-fiber connections (a connection between  
two fibers terminated with fiber connectors, using a fiber-to-fiber  
connector) count against the optical power budget. The loss in a  
fiber connection at the ends of the link is included in the optical  
power budget and does not count as an in-line connection.  
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893-862-B  
 
   
Table 2 lists the most common cable and connector combinations  
for the 10BASE-FL media adapter, assuming the maximum  
permitted attenuation with ST connectors. The table lists the  
maximum (total) distance allowed in the fiber connection.  
However, your fiber connection may have to be shorter to meet  
the optical power budget and Ethernet repeater rules.  
Table 2. 10BASE-FL cable and connector combinations  
Number of in-line  
fiber-to-fiber  
62.5/125-µm  
cable  
50/125-µm  
cable  
connections  
0
1
2000 m (6560 ft)  
2000 m (6560 ft)  
2000 m (6560 ft)  
2000 m (6560 ft)  
2000 m (6560 ft)  
2000 m (6560 ft)  
1750 m (5740 ft)  
1500 m (4920 ft)  
1250 m (4100 ft)  
1000 m (3280 ft)  
750 m (2460 ft)  
500 m (1640 ft)  
250 m (820 ft)  
0
2000 m (6560 ft)  
2000 m (6560 ft)  
2000 m (6560 ft)  
1710 m (5620 ft)  
1430 m (4690 ft)  
1140 m (3750 ft)  
860 m (2810 ft)  
570 m (1870 ft)  
290 m (940 ft)  
0
2
3
4
5
6
7
8
9
10  
11  
12  
13  
893-862-B  
5
 
 
BayStack Single Mode Fiber Media Adapter  
The optical power budget for the single-mode fiber media  
adapter is shown in Table 1. Power loss in the link cannot exceed  
the value for the type of fiber optic cable you are using.  
Table 3. Single-mode fiber optical power budget  
Parameter  
9/125 µm  
–29.0 dBm  
–35.5 dBm  
6.5 dB  
Transmitted power (average)  
Receiver sensitivity (average)  
Optical power budget  
Only in-line fiber-to-fiber connections (a connection between  
two fibers terminated with fiber connectors, using a fiber-to-fiber  
connector) count against the optical power budget. The loss in a  
fiber connection at the ends of the link is included in the optical  
power budget and does not count as an in-line connection.  
NOTE: Your fiber connection must meet the optical  
power budget and the Ethernet repeater rules for your  
network.  
6
893-862-B  
 
Installing a Media Adapter in a BayStack Hub  
A BayStack 10BASE-FL media adapter is installed in a slot on  
the front of the BayStack 10BASE-T Hub.  
To install a media adapter, follow these steps:  
1. Unplug the BayStack 10BASE-T Hub power cord from  
the AC power source.  
2. Remove the filler panel from the media adapter slot on  
the front panel of the hub.  
3. Install the media adapter into the media adapter slot.  
a. Align the media adapter with the card guides and gently  
slide in the media adapter until you feel it align with the  
connector on the hub motherboard.  
b. Firmly push the media adapter into the connector.  
CAUTION: Do not force or overtighten the  
captive retaining screw on the media adapter.  
c. Tighten the captive retaining screw on the media adapter  
by turning the screw clockwise.  
4. Reconnect the power cord.  
The hub powers up and performs a self-test.  
5. Make appropriate cable connections.  
For cabling information, see the section earlier in this guide  
that refers to the media adapter you are installing.  
893-862-B  
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6. Verify the installation for the media adapter.  
Observe for the installed media adapter that the respective  
Media Adapter LEDs on the front panel of the hub light  
according to Table 4.  
Table 4. Media adapter status LEDs  
Hub media  
Media adapter status  
adapter LEDs  
Green  
Amber  
Off  
Link status is good, port not partitioned.  
Link status is good, port is partitioned.  
Link status is bad or connection is not  
present.  
For more information about interpreting media adapter  
LEDs, refer to Chapter 1, “Quick Reference Information,” in  
Using the BayStack 10BASE-T Hubs.  
8
893-862-B  
 
Bay Networks, Inc. One-year Limited Hardware Warranty  
Bay Networks warrants this hardware product will be free from defects in material  
and workmanship for a period of one (1) year under normal operating conditions  
from the date of original purchase.  
Should you discover a defect in material or workmanship within this warranty  
period, Bay Networks will repair or replace the defective product when it is  
returned to Bay Networks, shipping prepaid. Replacement Products may be  
refurbished or contain refurbished materials. If you purchased this product through  
a Bay Networks reseller, please contact that reseller for return instructions. Prior to  
returning any Product, you or the reseller must obtain a Return Materials  
Authorization (RMA) number from Bay Networks. If Bay Networks, by its sole  
determination, is unable to repair or replace the defective product, it will refund the  
purchase price of the product. For products repaired or replaced by Bay Networks  
under this warranty, the warranty will continue to apply for the unexpired period of  
the original one (1) year warranty or for ninety (90) days following delivery of the  
repaired or replacement product to you, whichever is longer.  
This warranty does not apply if, in the judgment of Bay Networks, the Product fails  
due to damage from shipment, handling, storage, accident, abuse or misuse, or if it  
has been used or maintained in a manner not conforming to product manual  
instructions, has been modified in any way, or has had any serial number removed  
or defaced. Repair by anyone other than Bay Networks or an approved agent will  
void this warranty. The maximum liability of Bay Networks under this warranty is  
limited to the purchase price of the product covered by the warranty.  
EXCEPT AS SPECIFICALLY PROVIDED IN THIS AGREEMENT OR AS  
REQUIRED BY LAW, THE WARRANTIES AND REMEDIES STATED ABOVE  
ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN,  
EXPRESS OR IMPLIED. ANYANDALL OTHER WARRANTIES, INCLUDING  
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A  
PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY  
RIGHTS ARE EXPRESSLY EXCLUDED. BAY NETWORKS SHALL NOT  
UNDER ANY CIRCUMSTANCES BE LIABLE TO ANY PERSON FOR ANY  
SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES,  
INCLUDING, WITHOUT LIMITATION, DAMAGES RESULTING FROM USE  
OR MALFUNCTION OF THE PRODUCTS, LOSS OF DATA, LOSS OF  
PROFITS OR REVENUES OR COSTS OF REPLACEMENT GOODS, EVEN IF  
INFORMED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES.  
893-862-B  
9
 
Electromagnetic Emissions  
Meets requirements of:  
FCC Part 15, Class A Digital Devices  
VCCI Class 1 ITE  
EN 55 022 (CISPR 22, Class B)  
General License Vfg 243 (Class B)  
Compliance with the VCCI regulation is dependent upon the use of shielded AC  
power cables. The user is responsible for procuring the appropriate cables.  
Compliance with Class B regulations is dependent upon the use of shielded cables.  
The user is responsible for procuring the appropriate cables.  
For the complete electromagnetic emissions statements and declaration of  
conformance, see Using the BayStack 10BASE-T Hubs (Bay Networks part number  
893-839-A).  
Bay Networks Customer Support  
For information about a wide range of customer support services, call  
1-800-2LANWAN.  
10  
893-862-B  
 

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