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Chapter 6

Daughterboards and Cabling

6.1 Dual T1/Dual E1 Daughterboards
6.2 10/100Base-T Ethernet Daughterboard
6.2.1 Connecting the TX 3220 Boards for Redundancy

6.1 Dual T1/Dual E1 Daughterboards

The Dual T1/Dual E1 daughterboards provide the base communications processor with full access to two T1 or E1 primary rate digital trunk interfaces. All channels from the primary rate interfaces can be either terminated locally into high performance serial communication controllers or switched onto the H.100 bus for processing by other H.100 compliant boards.

The Dual T1 daughterboard (not the Dual E1) provides a DSX-1 type interface and requires an external Channel Service Unit (CSU) for connection to the public switched telephone network.

The Dual T1/Dual E1 daughterboards provide:

Figure 9 shows the connectors for the TX 3220 board equipped with a Dual T1/Dual E1 daughterboard:

Figure 9. Connectors on the TX 3220 Board Equipped With Dual T1/Dual E1 Daughterboard



Each of the RJ-48C connectors has the pinouts shown in Figure 10:







Figure 10.	 RJ-48C Pinouts for Dual T1/Dual E1 Daughterboards







6.2	 10/100Base-T Ethernet Daughterboard





The 10/100Base-T Ethernet daughterboard provides the TX 3220 board with an Ethernet connection supporting autonegotiation for 100Base-T full duplex/half duplex and 10Base-T full duplex/half duplex transmission.



Each 10/100Base-T Ethernet daughterboard has a single RJ-45 connector, as shown in Figure 11:





Figure 11.	 Connectors of the TX 3220 Board Equipped With Ethernet Daughterboard




The RJ-45 connector has the pinouts shown in Figure 12:





Figure 12.	 RJ-45 Pinouts for 10/100Base-T Ethernet Daughterboard






6.2.1	 Connecting the TX 3220 Boards for Redundancy





The TX 3220 board supports the redundancy feature available with later versions of the Signaling System 7 (SS7) software. The redundancy feature enables a system to detect and recover from the failure of signaling links on a TX SS7 board, the failure of a signaling node, or the failure of the TX SS7 board itself.



Each pair of TX 3220 boards is connected via a private 10/100Base-T Ethernet link. No other boards or devices may be connected to this private Ethernet link.



Figure 13 shows how to setup two TX 3220 boards based on the a dual-node redundant signaling server model in which the boards are located in two separate chassis for board-level and system-level redundancy.





Figure 13.	 Dual Node Redundant Signaling Server




Figure 14 illustrates how to setup two TX 3220 boards based on the single-node signaling server in which the boards are located in the same chassis for board-level redundancy.





Figure 14.	 Single-Node Signaling Server




For more information on SS7 redundancy, see the Health Management Developer's Manual.











 
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