102
Fig. 25.3 – Service Model 1 Chart
A C-VLAN is used between an ONT and service routers (BRAS, VoIP SR) that encapsulate services for one
subscriber (one ONT), such as VoIP, Internet, and IPTV unicast. An S-VLAN that is global for all subscribers
(ONTs) is used for the TR-069 management service. Corresponding GEM ports are created for every OLT
service between the ONTs and OLT. A dedicated MC-VLAN is used for multicast transmissions.
The OLT casts C-VLAN (for VoIP, Internet, and IPTV unicast) or S-VLAN (for TR-069) for every service into a
corresponding U-VLAN. An ONT associates the U-VLAN with corresponding ONT interfaces or program
modules. For example, the TR-069 service is associated with a TR-069 client with the help of a corresponding
interface. The VoIP, Internet, and IPTV unicast services can operate in the "router" or "bridge" modes
depending on the ONT configuration. The chart shows all services configured in the "router" mode.
Broadcast and unknown unicast traffic is transmitted in this model by replicating a corresponding packet
(broadcast or unknown unicast) to the OLT. C-VLAN replicates services to all associated GEM ports and at the
same time translates data to the corresponding U-VLAN for each service. The TR-069 service is replicated
between the corresponding GEM ports of all subscribers (ONTs). Thus, the model implements "VLAN for
Subscriber" for the VoIP, Internet, and IPTV unicast services, but uses "VLAN for Service" for the TR-069
service.
25.1.2
Model 2
Consider an example of Model 2 implementation.
The chart of this service model is shown in Fig. 25.4.
Summary of Contents for LTP-4X
Page 11: ...11 Part I General ...
Page 29: ...29 Part II Getting Started with the Terminal ...
Page 37: ...37 Part III Configuring the Terminal ...
Page 98: ...98 Part IV ONT Configuration ...
Page 174: ...174 Part V Terminal Monitoring ...
Page 189: ...189 Part VI Terminal Maintenance ...
Page 191: ...191 Step 2 Remove the module from the slot Fig 43 4 Removing SFP Transceivers ...
