Televes 769503, User Manual

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GPON ONT STANDAR
Physical interface (FXS ports)
The ONT has physical RJ11 FXS interfaces. In this version of the ONT equipment, voice interfaces are terminated in the equipment by means of FXS
(RJ11) connections.The RJ11 analog terminals adapter function is auto/self-configured, integrated (analog/VoIP) and associated with a defined
SIP or Megaco (H.248) user.
The ONT will allow VoIP or NGN (Next Generation Network) traffic from devices connected to the RJ11 or RJ45 interfaces, towards the same internal
VLAN.
Appart of the SIP and Megaco (H.248) self-configuration, it is also possible to make modifications in the voice service configurations by updating
the ONT SW through download from the OLT via OMCI.
The ONT equipment has a DHCP client (ONT 769503-4GE-2FXS) to get an IP address, alternatively the ONT could be configured with a static IP (ONT
769503-4GE-2FXS). The configuration of the static IP or DHCP client is related to the WAN side and is enabled by the OLT.
2.1.3.5 Multiple QoS per VLAN
The ONT supports 802.1p QoS per VLAN services in which several flows (one per allowed pbit) are embedded in the same VLAN. According to the
applied configuration, the ONT performs a per-flow QoS policy: dropping traffic marked with not allowed pbits and limiting to the configured
value the data rate of the allowed flows.
The ONT performs transparent VLAN translation. It is transparent to upper layer protocols, such as ARP, RIP, DHCP, IGMP, PPP, etc.
2.1.3.6 Mobile Backhaul
Due to the large increase on the bandwidth demand of the mobile backhaul networks to support 3G/4G services, PON networks are a natural op-
tion for its access component. ONT also supports this mobile backhaul service by mean of a Layer 2 bridging communication channel. Depending
on the interconnection of the mobile backhaul network architecture, ONT transports mobile data traffic over a defined combination of VLAN/GEM
PORT/T-CONT. This same configuration should be known and provisioned at the OLT and upper layer network architecture.
2.1.4 Policing / Rate Limiting.
2.1.4.1 Downstream QoS
The OLT system provides several QoS mechanisms, that can be targeted to the flow characterized by one or two VLAN according with the type of
service, or can be targeted to the packets priority, where each p-bit is mapped in one of eight queues of each port.
For each of OLT ports are associated eight queues, for each of these queues is possible to configure the p-bit mapping in one of the queues, the
scheduler type (Strict Priority or Weighted Fair Queuing) and the minimum and maximum bandwidth of each queue.
In the downstream direction the ingress traffic first passes by a policer configured to each ONT service, which is defined by one or two tags. After
this the traffic is put in a queue according with the p-bit/queue mapping. Each of these queues is associated with a scheduler and a policer. Then
the traffic flows to the GPON interface and when it arrives to the ONT it will pass by a mapping block which will map the traffic in one of the
eight queues according with the p-bits, these queues have a Strict Priority scheduler in order to guarantee that the most prioritized traffic passes
first.
Figure 2-8: Downstream QoS Diagram