Configuring The Ds3/E3 Uni Module - 3Com SuperStack II PathBuilder S330 Reference Manual

Configuring the
DS3/E3 UNI Module
To configure the DS3 UNI or E3 UNI module, follow these steps:
1 From the List Card menu, select [9] DS3 UNI to open the DS3 UNI Configuration
menu. Figure 75 shows the DS3 UNI Configuration menu. The E3 UNI
Configuration menu is similar.
Figure 75 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 S600 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.
ATM Cell Mapping—How the carrier will provision the DS3 UNI service from
the carrier ATM switch: Clear (HEC) or PLCP (Physical Layer Convergence
Protocol). Clear is the option preferred by both domestic and international
service providers and within private ATM networks, as it gives more payload
bandwidth than PLCP. You must match this setting at the two ends of the DS3
trunk.
ATM Payload Scramble—Enables (yes) or disables (No) payload scrambling
for the DS3 port. Payload scrambling scrambles the 48-byte payload in
outgoing cells in a defined manner and unscrambles the payload in incoming
cells. It is a technique used to avoid certain transmission equipment behaviors
(for example, erroneous alarm conditions) that are caused by sensitivity to
certain bit patterns in the ATM payload. You must match this setting at the
two ends of the DS3 trunk.
Configuring the DS3/E3 UNI Module 105