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LTP-8X optical line terminal
89
Terminal is reserved 64 default allocation for official purposes. The terminal allows you to configure up
to 192 per channel allocations for user data. Not in all cases, this will be enough to handle each service
in its own allocation. Follow adhere to the rules of Amax = 192 / N, where Amax - the maximum number
of allocations for a single ONT, and N - the number on the ONT channel. If the calculated amount of
services exceeds ONT Amax, should undertake a combination of multiple services into a single
allocation. More details in section 21.1.2.
DBA parameters are configured in the
dba
profile. These parameters allow specification of any T-CONT
type described in G.984.3. First of all, choose a service class which will define the basic DBA algorithm.
After that configure status reporting which defines a type of ONT queues status report. The "fixed-
bandwidth", "guaranteed-bandwidth", and "besteffort-bandwidth" parameters define the fixed,
guaranteed, and best-effort bandwidth correspondingly. Table 21.1 shows the correspondence between
alloc profile configuration and T-CONT types.
Table 21.1. DBA Profile Configuration and T-CONT types
T-CONT
type 1
T-CONT
type 2
T-CONT
type 3
T-CONT
type 4
T-CONT
type 5
service-class
cbr
voip
type5
type5
type5
status-reporting
-
+
+
+
+
fixed-bandwidth
+
-
-
-
+
guaranteed-bandwidth
-
+
+
-
+
besteffort-bandwidth
-
-
+
+
+
The following rules apply to dba profile assignment:
— when an ONT service is assigned an dba profile, an Alloc-ID is created for the ONT on the OLT side,
and a corresponding T-Cont is configured on the ONT side.
— if different ONTs are assigned the same profile, they will each have a separate Alloc-ID created with
the same allocation parameters.
— if for different services of the same ONT assign profiles alloc and point allocation-scheme share-t-
cont, then these services will work in the same allocation;
— if for different services of the same ONT assign profiles alloc and indicate allocate-new-t-cont, these
services will work in different allocation, the number of Alloc-ID created for the ONT is the number
assigned to a profile alloc.
