RAD Data comm IPmux-24 Manuale Utente Scaricare il pdf (Pagina 2)

IPmux-2L

TDM Pseudowire Gatewa

y

Preserves investment

in legacy equipment in

migration to PSN

High-performance ASIC-based buffering

and forwarding techniques achieve

minimal end-to-end processing delay.

Configurable packet size balances PSN

throughput and delay, while a jitter buffer

compensates for packet delay variation

(jitter) of up to 200 msec in the network.

An assigned, IANA-registered UDP port

number for pseudowire simplifies flow

classification through switches and

routers.

CLOCKING

Synchronization between TDM devices is

maintained by deploying advanced clock

distribution mechanisms. The clocking

options are:

 Internal – The IPmux-2L internal clock

oscillator provides the master clock

source for the TDM circuit

 Loopback – The transmit clock is

derived from the TDM or serial data

receive clock

 Adaptive – The clock is recovered from

the PSN

 Receive – The system timing is locked

to the clock received via one of the

TDM ports or the third FE port (Sync-E

option).

The system clock ensures a single clock

source for all TDM links and uses master

and fallback timing sources for clock

redundancy. The system timing also

supports two different clock sources from

two TDM links at the same time.

TIMING OVER PACKET

IPmux-2L utilizes standard Synchronous

Ethernet (Sync-E) technology to ensure

highly accurate clock recovery over PSN

(special ordering option). The clock

operation conforms to ITU-T G.8261

requirements.

PSEUDOWIRE QoS

IPmux-2L performs VLAN tagging and

priority labeling according to 802.1p&Q.

Pseudowire packets are assigned a

dedicated VLAN ID and 802.1p bit.

The ToS or Diffserv of the outgoing

pseudowire packets are user-configurable.

This allows assigning pseudowire packets

a higher priority in IP networks.

EXP bits are used for QoS marking of the

TDMoMPLS traffic in MPLS networks.

Figure 1. LAN and TDM Services over a Wireless Ethernet Link

1 2 3 4 5 6 7 8

Commenti su questo manuale

Nessun commento