Zhone Technologies IMACS-200 - Manual (Page 206)

10-4 OHSU Ports
Model No. Running Head
WAN TS
The TS (time slot) setting identifies the time slots on the WAN link. Unlike other user ports,
the OHSU port can use many time slots on a single WAN or OWAN port to create a super-rate
circuit for an individual OHSU port. One to 12 DS0 time slots on a single T1 or E1 can be
assembled for use by an OHSU port in order to satisfy the speed requirements of the
Telephone Protection Device (TPD).
The time slot numbers range from 1 to 24 for T1 links, and 1 to 31 for E1 links. Figure 10-3
shows the display when table is selected. Using the space bar to select and deselect the time
slot, this example shows time slots 1 to 5 on WAN 1-1 assigned to port 2. The time slot
assignments have to be contiguous on any port.
Figure 10-3.Typical OHSU Port Time Slot Assignment Screen
Tx CLOCK
The OHSU ports behave as IEEE C37.94 MUX ports so the Transmit Clock (Tx CLOCK)
setting can only be int (internal).
LOCAL LB
The LOCAL Loopback (LOCAL LB) option activates a loopback on the selected port. Choose
the User setting to loop the outgoing data from the external TPE device back to the TPE
receiver. This loopback (see Figure 10-4) allows you to check the local cabling and most of
the optical circuitry in the OHSU port. It also disconnects the incoming data from the far end.