Allied Telesis RG6x4 Series Voice over IP AT-RG634A/B and AT-RG644A/B, Video Streaming, WAN Port

RG6x4 SERIES ADSL2/2+ Residential Gateways

Voice over IP (AT-RG634A/B and AT-RG644A/B)

The RG6x4 offer a choice of Voice over IP signaling methods, namely H.323, SIP and MGCP including NCS 1.0 profile. H.323 provides compatibility with existing H.323 services (e.g. Microsoft NetMeeting) whilst SIP and MGCP are newer protocols, optimized for operation over IP networks.This multiple protocol support provides maximum flexibility for service providers, allowing them to provide an IP telephony service based on cost and feature-set, rather than being limited by the protocol used.

Similarly, a choice of different voice and data encoding algorithms are also available comprising G.711 A-law, µ-law (64kbps), G.729 (8kbps),T.38, so that maximum VoIP interworking is assured with carrier class IP Gateways and network switches. Quality of Service is provided through mechanisms such as the Type of Service (ToS) field in the IP packet, priority tagging of voice traffic using IEEE 802.1p, as well as silence suppression and local generation of comfort noise – the result is excellent voice quality.

The AT-RG634A/B allows the connection of two standard analog phones, modems or faxes through 2x FXS ports, or digital devices can can be connected to the AT-RG644A/B through 1x ISDN BRI port. Class 5 services are supported and the VoIP interoperability has been certified versus major softswitch vendors.

Video Streaming

The RG6x4 offers unique features to optimize the delivery of video contents to customers on copper pair, namely VLAN, extended interleave memory, IGMP snooping and proxying. It supports full IGMP snooping capability (v1/v2) and individual LAN ports can receive different multicast transmissions e.g. different movies or TV channels.The RG6x4 ‘snoops’ IGMP packets in-transit, so it knows which port to forward the particular multicast data to.This results in high quality, high bandwidth video streaming without affecting Internet browsing or IP telephony on adjacent ports. Moreover, the RG6x4 supports IGMP proxying to allow forwarding of multicast packets at Layer 3 with or without NAT.

Management and Configuration

The RG6x4 is designed for high volume ADSL access network deployment; this is reflected in the Zero Touch Configurator (ZTC), whereby no user intervention is required when installing a unit. ZTC is a distributed configuration system based on the industry standard Lightweight Directory Access Protocol (LDAP). ZTC provides intelligent and automatic configuration of remote RG units. It analyzes incoming status information from each RG unit and dynamically creates the appropriate configuration file or operating system download as required, it then selects the appropriate download mechanism (e.g.TFTP, HTTP, HTTPS etc.) to complete the process.The ZTC client in the RG initiates the download process on power up, or on expiry of its DHCP lease timer. ZTC provides secure authentication of client devices, resilience through distributed server operation and in- built scalability for very large networks.

The RG6x4 also offers the following conventional management and configuration interfaces:

•Telnet (using Command Line Interface)

•SNMP v1/v2/v3

Specifications
User’s Ports
4	10/100TX	(RJ45)
2	VoIP FXS ports (RJ-11)		AT-RG634A/B
1	VoIP EuroISDN LT-S BRI		AT-RG644A/B
WAN Port
1	ADSL (RJ-11) Annex A
1	ADSL (RJ45) Annex B

Layer 2 Operation

Layer 2 wirespeed packet switching IGMP v1/v2 Multicast support

Tag based IEEE 802.1Q VLANs (16 max.) IEEE 802.1p prioritization

IEEE 802.1Q tag insertion and stripping

Programmable Rate limiting ingress/egress Port Mirroring ingress/egress traffic

Double QoS queue on each port

Port speed selection 10, 100 or 10/100 1,000 MAC addresses

Layer 3 Operation

NAT

PPPoE

Stateful Inspection Firewall

Intrusion Detection and Blocking System

IPSec/VPN		passthrough
Virtual	Server
Global	IP	address pool
Dynamic port opening
DHCP client, server and relay
DNS proxy
PAP/CHAP		authentication
Static and Dynamic IP address assignment
RIPv1/v2
VoIP Protocols
H.323		3.0
SIP		2.0
MGCP/NCS		1.0

VOIP Ports (AT-RG634A/B and AT-RG644A/B)

G.711	a-law and µ-law 64kbps
G.723	(optional)
G.726	16/24/32/40kbps
G.729	8kbps
G.168	LEC 8-32 msec
T.38 Fax		Relay
Automatic		Fax/Modem Detection
Voice	Activity		Detection	(VAD)
Comfort Noise			Generation (CNG)
Error	Mitigation/Bad Frame Interpolation
Adaptive jitter			buffer	5 per FXS port (AT-RG634A/B)
REN:
ISDN BRI		Power feed:		100mA, 4W (AT-RG644A/B)
RTP voice		packet encapsulation

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