103
Fig. 25.4 – Service Model 2 Chart
Dedicated S-VLANs are used between the OLT and service routers (BRAS, VoIP SR) for each of the
following services: VoIP, Internet, IPTV unicast, and TR-069. These S-VLANs are common for all subscribers
(ONTs). Corresponding GEM ports are created for every OLT service between the ONTs and OLT. A dedicated
MC-VLAN is used for multicast transmissions.
OLT transmits S-VLAN into a corresponding U-VLAN for each service. 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.
All broadcast and unknown unicast traffic is redirected to a dedicated broadcast GEM port in this
model. Broadcast and unknown unicast packets are sent to U-VLAN (for the VoIP, Internet, and IPTV
unicast services) in the ONT.
In general, this model is similar to Model 3 except the following: transmission of C-VLAN to U-VLAN
is performed on the OLT side, while the VoIP, Internet, and IPTV unicast traffic comes to U-VLAN in the
ONT.
Thus, the model implements "VLAN for Service" for the VoIP, Internet, IPTV unicast, and TR-069
services.
25.1.3
Model 3
Consider an example of Model 3 implementation.
The chart of this service model is shown in Fig. 25.5.
Dedicated S-VLANs are used between the OLT and service routers (BRAS, VoIP SR) for each of the
following services: VoIP, Internet, IPTV unicast, and TR-069. These S-VLANs are common for all
subscribers (ONTs). Corresponding GEM ports are created for every OLT service between the ONTs and
OLT. A dedicated MC-VLAN is used for multicast transmissions.
The VoIP, Internet, IPTV, and TR-069 unicast services are associated with S-VLAN in an ONT. The ONT
transmits S-VLAN into a corresponding U-VLAN for each service. The 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
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 ...