WJLXT384LE.B1-868635 Cortina Systems Inc, WJLXT384LE.B1-868635 Datasheet - Page 63

• Manufacturer Part Number: WJLXT384LE.B1-868635
• Manufacturer: Cortina Systems Inc

Specifications of WJLXT384LE.B1-868635

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

LXT384 Transceiver
Datasheet
248994, Revision 6.0
30 January 2008
Note:
6.10
Cortina Systems
Performance Monitoring through Remote Loopback. Performance monitoring of either
(1) analog line inputs RTIP/RRING to any one of channels 1 through 7 or (2) analog line
outputs TTIP/TRING from any one of channels 1 through 7 can be accomplished through
remote loopback as follows:
A benefit of performance-monitoring is that the monitored signal can be sent to channel 0,
where it can be used as a timing reference clock.
Hitless Protection Switching
The LXT384 Transceiver has a feature that allows it to be used in an Hitless Protection-
Switching application. Hitless Protection-Switching is an alternative redundancy (backup)
method that uses very fast silicon switching instead of slow mechanical relays. This method
is best implemented using 1+1 circuitry.
The LXT384 Transceiver can provide Hitless Protection-Switching for the following reasons:
®
1. Configure the LXT384 Transceiver as shown in
2. The monitored channel and channel 0 output the same data. By connecting the
• The transmit outputs from the LXT384 Transceiver can be placed immediately into a
• The jitter attenuator produces a constant throughput delay for smooth switching of data.
LXT384 Octal T1/E1/J1 Short-Haul PCM Transceiver with Jitter Attenuation (JA)
Loopback. (TCLK must be active for remote loopback to operate.)
channel 0 output data (TTIP0/TRING0) to standard test equipment, the line signal from
the channel selected can be monitored.
high impedance tristate, which allows two outputs to be connected directly while one
output is turned off.
For more information about Hitless Protection-Switching, see the document 1+1
Protection without Relays Using Cortina Systems
Switching - Application Note listed in
Section 1.3, Related
Figure 10
®
TM
TM
LXT380/1/4/6/8 Hitless Protection
6.10 Hitless Protection Switching
in
Documents.
Section 6.7.3, Remote
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