User manual

Chapter 2 Installation
21
2.7 FIB1-10/100
The FIB1-10/100 is an Ethernet media converter that supports 10Base-T or
100Base-TX and converts to 100Base-FX (fiber). The UTP side supports auto-
negotiation or forced settings for speed and duplex by setting of internal DIP switch.
When the FIB1-10/100 is placed in the FRM301 with SNMP, the settings are
controlled by the chassis management system and any DIP settings are ignored.
There are two distinct hardware versions of FIB1-10/100 cards. The old version
was based upon a Kendin 8995E chip. This chip may easily be identified as it has an
aluminum heatsink attached to the chip. The newer (current) version card uses an
IC+ IP113A chip, easily identified by its small 8x8mm foot print. Both versions have
a 6 pole DIP switch. The differenced in switch settings and specifications are shown
in the table below.
Kendin 8995E based IC+ IP113A based
MDI / MDI-X manual push button switch
1
supports auto MDI-X
1
Switch 6 OFF standard 1522 Bytes packets
2
up to 1600 Bytes packets
2
Switch 6 ON supports 1536 Bytes packets
2
up to 1600 Bytes packets
2
notes:
1. A number of models with IC+ chip still have the pushbutton switch for MDI/MDI-X,
however, link will occur in either position since this chip supports auto MDI-X.
2. Switch 6 has no effect on this converter. All packets up to and including 1600 Byte jumbo
packets are supported.
DIP Switch Setting Table
DIP functional description
1 OFF=Auto-negotiation enabled / ON=Manual, Forced (Dip 2&3 apply)
2 OFF=Full Duplex / ON=Half Duplex (DIP 1 must be ON)
3 OFF=100 / ON=10 (DIP 1 must be ON)
4 reserved
5 OFF=LLF OFF / ON=LLF ON (Link Loss Forwarding function)
6 reserved *
* On the legacy FIB1-10/100, this switch ON will allow VLAN Tag packets up to 1536 Bytes.
When OFF, the converter will support up to 1522 Byte packets only.
Link Loss Forwarding
This media converter incorporates a Link Forwarding feature which allows
indirect sensing of a Fiber or UTP Link Loss via the 100 Base-TX UTP connection.
Whenever the media converter detects a Link Loss condition on the Receive fiber
(Fiber LNK OFF), it disables its UTP transmitter so that a Link Loss condition will be
sensed on the receive UTP port. (See the following figure) The link loss can then be
sensed and reported by a Network Management agent at the host equipment of
remote UTP port