MX3216 System Manual3-2 61189008L1-1BMX3216 DATA PATH BLOCK DIAGRAMThe MX3216 contains a 3/1 cross-connect that allows DS1s to be mapped between two DS3s,eight DSX-1 ports, and two expansion slots in the MX3 chassis (see Figure 3-1).Figure 3-1. MX3216 Data Path Block DiagramEach expansion slot has four DS1s available. The expansion slots share two of the DS1s (seeFigure 3-1). How the DS1s are used depends on the module installed. For example, theMX3RMM only uses two DS1s.Any DS1 in DS3 A can be mapped to any DS1 in DS3 B, and vice versa. Any DSX-1 port canbe mapped to any DS1 in DS3 A or DS3 B. The expansion slot DS1s can be mapped to anyDS1 in DS3 A or DS3 B and to any other expansion slot DS1. In addition, any two DSX-1ports can be mapped to expansion slot DS1s.Any unmapped DS1 in a DS3 is filled with AIS (unframed All Ones). Any unmapped DSX-1port is disabled with the transmit drivers tri-stated and no alarms reported.The default mapping of the 3/1 cross-connect is for all the DS1s to pass straight through fromone DS3 to the other. No DS1s are dropped to the DSX-1 ports or the expansion slots. Ifneeded, re-establish the default mapping through selecting the Restore Map to FactoryDefault option on the “Cross-Connect Menu” on page 6-35.The following applications relate to the MX3216 data path block diagram:• “Drop and Continue Application” on page 3-3• “Drop and Insert Application” on page 3-6DS3 A DS3 BDS1 PORT #1 (P1)DS1 PORT #2 (P2)DS1 PORT #3 (P3)DS1 PORT #4 (P4)DS1 PORT #5 (P5)DS1 PORT #6 (P6)DS1 PORT #7 (P7)DS1 PORT #8 (P8)MOD A #1 (MA1)MOD A #2 (MA2)MOD A #3 (MA3)MOD A #4 (MA4)MOD B #4 (MB4)MOD B #3 (MB3)MOD B #2 (MB2)MOD B #1 (MB1)DS3 B T1 #1 (B1)DS3 B T1 #2 (B2)DS3 B T1 #3 (B3)DS3 B T1 #4 (B4)DS3 B T1 #5 (B5)DS3 B T1 #6 (B6)DS3 B T1 #7 (B7)DS3 B T1 #8 (B8)•••DS3 B T1 #25 (B25)DS3 B T1 #26 (B26)DS3 B T1 #27 (B27)DS3 B T1 #28 (B28)DS3FramerandM13MUX3/1 Cross-ConnectDS3FramerandM13MUXDS3 A T1 #1 (A1)DS3 A T1 #2 (A2)DS3 A T1 #3 (A3)DS3 A T1 #4 (A4)DS3 A T1 #5 (A5)DS3 A T1 #6 (A6)DS3 A T1 #7 (A7)DS3 A T1 #8 (A8)•••DS3 A T1 #25 (A25)DS3 A T1 #26 (A26)DS3 A T1 #27 (A27)DS3 A T1 #28 (A28)ModuleBModuleADS1 Ports1-8
