Extreme Networks 10018 manual Installing and Removing a Xenpak Module, LX4 Xenpak

Extreme Networks XENPAK Transceivers

The default transmitter clock locking mode of the LW XENPAK module is set to line timing mode. When in line timing mode, the LW XENPAK module transmitter clock is locked to the receiver-recovered clock. When the LW XENPAK is connected to the SONET/SDH network on the other side of optical cable, the LW XENPAK transmitter clock synchronizes with the SONET/SDH clock source, which helps reduce the pointer adjustment between the SONET/SDH network and the LW XENPAK.

To prevent a clock reference loop, be sure that only one end of a link is using line timing mode and to use internal timing when testing with an optical loopback cable.

LX4 XENPAK

The LX4 XENPAK supports multimode MMF cable in intra-building connections and SMF cable for interbuilding connections.

The LX4 XENPAK has SC connectors.

The LX4 XENPAK requires the software versions listed here.

Table 16: BlackDiamond Switches

Switch Model	Required Software
BlackDiamond 10808	ExtremeXOS 11.3.1 or later
BlackDiamond 8800 series	ExtremeXOS 11.3.1 or later
BlackDiamond 12804	ExtremeXOS 11.4 or later
BlackDiamond 12802	ExtremeXOS 12.0 or later

Table 17: Summit Switches

Switch Model	Required Software
Summit X450 series	ExtremeXOS 11.3.1 or later
Summit X450a series	ExtremeXOS 11.3.1 or later
Summit X450e series	ExtremeXOS 11.3.1 or later

For technical specifications for the LX4 XENPAK, see Technical Specifications.

Installing and Removing a XENPAK Module

Warning

XENPAK modules become very hot after prolonged use. Be careful when removing a XENPAK module from the chassis or option card. If the XENPAK module is too hot to touch, disengage the XENPAK module and allow it to cool before removing it completely.

Pluggable Hardware Installation Guide 46