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DEFINITY Made Easy Tools
Issue 2, November 2000
DEFINITY Hardware
TN789
The TN789 circuit pack is an interface between a DEFINITY system and 2 Wireless Fixed Base (WFB) radio units for the DEFINITY wireless business system R1-PWT. The TN789 contains a main processor to handle data line circuit (DLC) and upper medium access (MAC) layers of firmware. The TN789 also contains 2 lower MAC processors; 1 for each radio interface. Each radio interface is referred to as an I2 interface.
The I2 link is the connection between the Radio Controller (RC) and the WFB. The RC supports up to two I2 links, each link consisting of 4 pairs of twisted-pair cable: the transmit pair, the receive pair, and the local power pair. The transmit pair transfers WFB control and frame information from the RC to the WFB. The receive pair transfers status and frame information from the WFB to the RC. If the RC cannot provide power to the WFB, a third pair (to the WFB) can supply local power. When possible, the transmit pair and the receive pair provide phantom power from the RC to the WFB.
Each circuit pack includes a standard TDM bus interface from a system, 2 radio interfaces to 2 separate radio units, and 2 synchronization ports. In addition, 2 RS-232 interfaces provide for a debug terminal and for setting up the wireless terminal. Provides an interface to Wizard II base stations (DWBS).
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| Copyright� 2000 Avaya Inc |
| Send comments to MadeEasy Development Team |
| Always check at the Made Easy Web site for the most current information. |