Keywords: supermapper, superframer, transmux, clear channel, map/demap, T3, line interface units, t3 LIUs, trans mux
The Agere Supermapper Device Family includes the following: Supermapper, SupermapperLite, and the Superframer. This application note will discuss applications that pertain only to the following Agere devices: SupermapperLite and Supermapper.
The following diagrams will illustrate Dallas T3 LIUs from the DS315x series or multiples of the DS3150. Depending on the line card/system design, the designer will need to choose which of the five Dallas LIUs to utilize.
Note: The Agere Supermapper Device Family does not contain E3 functionality, or DS3 Jitter Attenuation.
Figure 1. T3 Clear-channel application.
Figure 2. T3 TransMUX application.
Figure 3. T3 and T1/E1 map/demap application.
Figure 4. T3 and DS0/E0 map/demap application.
The interface between a T3 analog line and a Line Interface Unit can be in either bipolar or unipolar mode. Table 1 lists the register settings of the Agere Supermappers for DS3 Bipolar/Unipolar control.
Table 1. Agere Supermapper DS3 Bipolar/Unipolar Control Bits
|BLOCK NAME||REGISTER NAME||ADDRESS||DESCRIPTION|
|SPE||SPE_TDS3_BIPOLAR||0x19 ||Transmit DS3 Bipolar/Unipolar. When 1, the DS3 input is bipolar; when 0, the DS3 input is unipolar. Note this is valid only if register 0x30018[13:12] = 11.|
|SPE||SPE_RDS3_BIPOLAR||0x19 ||Receive DS3 Bipolar/Unipolar. When 1, the DS3 output is bipolar; when 0, the DS3 output is unipolar. Note this is valid only if register 0x30018[5:4] = 11.|
|M13||M13_BIPOLAR||0x5D ||M13_BIPOLAR Bit. The M13 performs B3ZS encoding and decoding if this bit is high, i.e., the I/O is in dual-rail mode where each rail carries a polarity of a bipolar I/O. When set to 0, the I/O is a single-rail unencoded NRZ signal.|
If you have further questions about connecting any of our T3 LIUs, then please contact the Telecommunication Applications support team.