Protected Links And Rings; Co-Channel Xpic Operation - Alcatel-Lucent 9500 MXC User Manual

Chapter 7. Node and Terminal Plug-ins

Protected Links and Rings

Co-Channel XPIC Operation

Vol. IV-7-4
Where a protected link or ring is required, the protection configuration must first
be established in the Protection screen. Refer to Volume IV, Chapter 8.
• Protection options are described at:
• Protection Options on page 7-14.
Includes example screens for protected configurations.
• Protection Settings on page 7-18.
With a 9500 MXC Node there is automatic synchronization of RAC settings
depending on the protection option, such that the secondary RAC is
synchronized to the primary, or West with East in the case of a ring.
Table 7-3 on page 7-19 details synchronized RAC settings.
For a 9500 MXC Terminal there is no automatic synchronization of IDU
settings. Each IDU must be independently configured for identical
operation. For easy configuration, display the screens for both IDUs so you
can view them simultaneously and click between each.
• For single antenna protected operation, equal-loss and unequal-loss coupler
options are available. Refer to Table 7-4 on page 7-19.
Where two RAC 40s are installed for co-channel XPIC link operation they must
be configured as two independent RACs; there are no common RAC settings.
• For co-channel operation each must be configured for identical frequency, Tx
power, and capacity/bandwidth options.
• Capacity options are restricted to 64/75xE1, 70/84/100xDS1, STM1.
• All capacity options are provided within a 27.5/28 MHz mask (channel spacing)
for ETSI rates, or within a 30 MHz mask for ANSI rates.
• ATPC must not be used.
The plug-ins screen for each RAC 40 includes a Polarization Settings panel
immediately below Protection Settings.
The panel prompts for polarization (vertical or horizontal), and the location of the
partner RAC 40. The entries are purely informational and do not affect link
operation. Figure 7-2 shows the panel with an entry displaying the IP address for
a co-located INU and the slot number used.
The Diagnostics > Performance screen includes a cross polarization
discrimination measurement for RAC 40 pairings, which measures the native V
and H signal discrimination in dB at the input to the RAC 40s (from the antenna
feeds). The improvement in signal discrimination provided by the RAC 40 XPIC
function is in addition to this measurement.
Alcatel-Lucent