3Com 3C63400-3AC-C - PathBuilder S700 Switch Reference Manual page 183

Figure 136 CBR DSX Port Configuration Menu (Structured Data Port)
b Set the following port configuration parameters, as desired.
DSO Channels are not configurable from the CBR Port Configuration menu. You
can assign DSO channels in structured voice or structured data mode only when
you add a CBR virtual circuit. See "CBR Module Virtual Circuit Parameters" later in
this chapter for details. All available DSO channels are automatically allocated in
unstructured mode.
LBO (DSX-1 CBR only)—Line Build Out. LBO refers to the signal
generation/regeneration of the distance between the PathBuilder S700 and the
next crossconnect of FOTs (Fiber Optic Terminal system), in feet: 1-100,
100-200, 200-300, 300-400, 400-500 or 500-600.
Line Code (DSX-1 CBR only)—The zero code suppression technique
configured to the DSX-1 CBR port. Set this parameter to match the service
provider or device connection line coding. The default is B8ZS. The Line Code
must match at local and remote ports.
AMI—Alternate mark inversion; a T1 (1.544 Mbps) carrier line coding
format whereby successive ones (marks) are alternately inverted.
B8ZS—Binary 8 Zero Substitution; a T1 (1.544Mbps) carrier line coding
format used to accommodate "ones density" for clear channel
transmission.
Port Mode—The type of service configured to the specified port:
Both Structured Data and Structured Voice modes allow end to end DSO
connectivity.
Structured Data—Structured service provides N x 64 kbit/second
capability, where N ranges between 1 and the maximum number of
available DSO channels. Structured data service passes traffic with signaling
information disabled—it provides for DSO midspan carrier access without
ABCD signaling bits terminating DS1 or E1 framing at the DSX-1 CBR or E1
CBR interface.
Configuring DSX-1 CBR or E1 CBR Modules 169