Zhone IMACS 8000, User Manual

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9-18 System Cards
Model No.
Running Head
WAN Module Descriptions WAN Card
9.3.2 CSU Module Description (81230)
The CSU module is required for Channel Service Unit (CSU) operation on a T1 line. This
module mounts on the WAN SINGLE, WAN DUAL, and WAN-R cards, as shown in Figure
9-10. All WAN cards equipped with CSU modules also act as the "remote terminal"
termination points for the Subscriber Loop Carrier (SLC-96) facilities defined in Bellcore
publication TR-TSY-000008, Issue 2, August 1987.
9.3.2.1 CSU Module Installation
Install the CSU module on the associated WAN card by plugging its connector pins into the
mating sockets of the WAN card, as shown in Figure 9-10. For a WAN DUAL or WAN-R card,
you can install two modules.
9.3.2.2 CSU Module Jumper/Switch Settings
The CSU module does not have any jumpers or switches.
9.3.3 Installing the WAN Cards
After installing the proper modules on the WAN cards (not applicable on the 801070 and
801470 cards) and setting the proper jumper settings, insert the WAN cards into the system
chassis. Each system can have up to four WAN cards, which go into slots W1 through W4.
For a system with redundant WAN cards, always insert a WAN-R card into slot W4. If you
install the WAN-R card into any other WAN card slot, it will work as a regular WAN card (not
as a redundant card). Also make sure that the WAN-R card has the same types of modules
installed on it as the associated primary WAN cards, and that those modules are installed in
the same positions (ports 1 and 2), as shown in Figure 9-10.
9.3.3.1 WAN-rr alarms
New in CPU-7 are WAN RR alarms. If the WAN card is in protection mode, then it effectively
only would provide 1+1 protection for the card that had caused the protection activity, instead
of providing n+1 protection for the three other WAN cards in the shelf. In order to flag this to
the user, we have added a WAN RR alarm to the user interface and SNMP trap to notify that
a WAN protection switch has taken place and the system is no longer providing 1+n
protection.