APC IP DSLAM User's Guide download pdf (Page 34)

EDA 1200 System Overview

• PPP Automatic – The IP DSLAM will automatically sense the access

method (PPPoE or PPPoA) used by the CPE. This access method is not

supported by the EFN324. This method is not available if VMAC domain 60

is used. (See EDA 1200 Security Features description) Using a payload of

1500 bytes towards the BRAS, according to RFC 4638, can be enabled.

• Static IP over ATM – This method is used for IPoA access (RFC2684R)

with End-user equipment by using a static IP address. This access method

is not supported by the EFN324. This method is not available if VMAC

domain 60 is used. (See EDA 1200 Security Features description)

• Transparent IP over ATM - This method is used for transparent IPoA

access (RFC2684R). When the transparent IPoA is used, all filtering in the

IP DSLAM for the subscriber is disabled, and broadcast is allowed. If any

filtering or protection is desired, it must be done in the Edge Node or CPE.

This access method is not supported by the EFN324. This method is not

available if VMAC domain 60 is used. (See EDA 1200 Security Features

description)

• Dynamic IP over ATM – This method is used for IPoA access (RFC2684R)

with End-user equipment requesting dynamic IP address assignment via

DHCP. This access method is not supported by the EFN324. This method

is not available if VMAC domain 60 is used. (See EDA 1200 Security

Features description)

3.2 Quality of Service in the Network

Quality of Service (QoS) of a network deals with the ability of the network to

provide transport services suitable for the applications using the network. The

Quality of Service in EDA 1200 is ensured by classifying packets and handling

their transmission through the network according to the classification of each

packet.

There are three main parameters that affect the quality of the transmission:

• Packet loss – packets of information that get lost in the network and do

not reach the receiver

• Delay – the time it takes for a packet to traverse through the network from

the sender to the receiver

• Jitter – variation in the delay within the same traffic flow

Table 6 illustrates the different requirements that different services have:

Table 7 QoS Requirements of different Service Types

Packet loss Delay Jitter

Video

Very sensitive (Not) sensitive Not sensitive

30 1/1551-LZA 101 464-V1 Uen C 2009-12-17

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 66 67

No comments

APC IP DSLAM User's Guide Page 34