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Configuring the
DS3/E3 UNI Module
Timing Source — The timing source for the OC3/STM-1 transmit clock.
Loop — Configures the OC3/STM-1 port interface to use the input port Rx
clock as the timing source; timing is received from the service "loop." Select
Loop if the OC3/STM-1 port is used for the network/carrier service termination,
in which case the carrier (the service "loop") typically provides the timing
source.
System — Configures the OC3/STM-1port interface to use the system clock as
defined in the System Clock Configuration menu as its timing source. For
details about designating the system clock, see "Configuring the System
Clock" in Chapter 3.
To configure the DS3 UNI or E3 UNI module:
1 From the List Card menu, select [9] DS3 UNI to open the DS3 UNI Configuration
menu. Figure 84 shows the DS3 UNI Configuration menu. The E3 UNI
Configuration menu is similar.
Figure 84 DS3 UNI Configuration Menu
2 Set the following parameters as desired:
Admin Status — Administrative Status: In Service or Out of Service.
LBO Length (DS3 only) — Line Build Out length. The signal
generation/regeneration of the distance between the PathBuilder S330/S310
switch and the next crossconnect or FOTs (Fiber Optic Terminal system), in feet:
0-225 or 225-450.
DS3 Framing Mode (DS3 only) — The type of frame organization configured
for the specified port interface: Cbit or M23. Set this parameter to match the
framing type offered by your service provider. Cbit is the most common setting,
as its use of overhead bits for administration and maintenance allows the
service provider more visibility in isolating any issues with the physical line
connections through the WAN. You must match this setting at the two ends of
the DS3 trunk.
Configuring the DS3/E3 UNI Module
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