Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 2 Cisco IGX 8400 Series Cards
Universal Router Module
You can use remote loopback (RL) to enable a far-end modem loopback. Local loopback (LL) is not
provided as an output on the LDI back card.
The LDI back card supports two clocking modes: normal and looped (see Figure 2-40). The normal
mode is used when the LDI port is configured as a DCE. Looped clock is only used when the LDI port
is configured as a DTE. The user device must take the external transmit clock and loop it back to the
RxC for clocking in the receive data. In both cases, the LDI is the source of clock timing.
Figure 2-40 LDI Back Card Clocking Modes
Universal Router Module
Table 2-52 shows the front and back cards supported for the universal router module (URM).
User device
(DTE)
LDI
(DCE)
TxD
TxC
A. Normal clock (LDI as a DCE)
XD
RD
H8066
XTC (not used)
User device
(DCE)
LDI
(DTE)
RxD
RxC
B. Looped clock (LDI as a DTE) -
User device loops clock
RD
XD
TxD
XTC
CLK
RxD
RxC
LDI does not support external or isochronous clocking.
CLK
Table 2-52 Universal Router Module Front and Back Cards
Front Card Back Cards
URM BC-URI2FE2VT1
BC-URI2FE2VE1
BC-URI2FE