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VDL-2420M

24-Port VDSL2 IP DSLAM + 2-Port Gigabit TP/SFP Combo

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Key Features
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Perfectly Designed for FTTx Last Mile Applications

PLANET VDL-2420M is a telecom-level, high-performance VDSL2 IP DSLAM (Digital Subscriber Line Access Multiplexer) with 24 VDSL2 ports, 2 Gigabit TP/SFP combo interfaces and robust Layer 2+ switching features. The VDL-2420M is fully compliant with the ITU-T G.993.2 standard and supports VDSL2 30a profiles to offer a maximum download or upload line rate of up to 100/100Mbps on the existing twisted-pair lines. The VDL-2420M helps service providers to easily provide high bandwidth demanded by triple play services such as IPTV, HDTV, Video Phone and Internet Gaming over the same copper line and they can be uplinked to the core/metro Ethernet network through the two Gigabit fiber-optic interfaces. It is an ideal CO solution for FTTx Last Mile applications of broadband access by ISPs, telecoms and campuses.

Comprehensive and Advanced VDSL2 Configuration

For the bandwidth and distance of broadband access, the VDL-2420M VDSL2 IP DSLAM supports multiple selective VDSL2 profiles (8a, 8b, 8c, 8d, 12a, 12b, 17a and 30a). To help provide the ISPs with internet access service in different physical line installation environments, the VDL-2420M supports configurable DPBO (Downstream Power Back-Off) and UPBO (Upstream Power Back-Off) to adjust the downstream and upstream transmit power levels for service providers to reduce the interference by nearby wires. Furthermore, it can be configured on a per link basis for transmission mode, rate limitation and SNR (signal-to-noise) margin. These advanced VDSL2 functionalities help service providers to adjust the line performance to ensure the VDSL2 service cannot be impacted by other xDSL services in the same binder group and build a stable and reliable IP DSLAM solution.

Delivering Highly-demanding Connectivity for ISPs/Triple Play Devices

As the demand for home broadband connections increases, the VDSL2 technology is the next media to support the integration of home services and provides a significant transmission speed faster than that of the current cable modem and ADSL technology. The VDL-2420M applies the EoVDSL (Ethernet over VDSL) to providing up to 100Mbps download capability and makes the following multi-media services more efficient on the local network:

　■ IPTV/HDTV

　■ VoD (Video on Demand)

　■ Voice over IP

　■ Video Conferencing/Video Phone

　■ On-line Gaming

　■ Internet Radio/On-line Music

　■ Long-distance Education

The VDL-2420M offers an excellent bandwidth to meet the requirements of the triple play devices for home entertainment and communications.

QoS Features Provided to Ensure Best Performance

The VDSL2 DSLAM contains robust QoS features such as port-based, 802.1p priority and IP ToS/DSCP to ensure the best performance of its VoIP and video stream transmission, thus empowering the enterprises to take full advantage of the limited network resources.

Selectable VDSL2 Data Rate for Service Differentiation

Through the management interface, the administrator can control the data transmission speed of each VDSL2 interface. Telecoms and ISPs can immediately and remotely upgrade/downgrade bandwidth service upon different demands.

Efficient Management

To further expand the current network, PLANET VDL-2420M provides console and Telnet command line interfaces, and advanced Web and SNMP management interfaces. With its built-in Web-based management interface, the VDSL2 DSLAM offers an easy-to-use, platform-independent management and configuration facility. The VDSL2 DSLAM supports standard Simple Network Management Protocol (SNMP) and can be monitored via any standard-based management software. For text-based management, the VDSL2 DSLAM can also be accessed via Telnet and the console port. The features above provide an efficient way to manage the devices from the internet environment with no need to add an extra secure system either by means of hardware or software.

Robust Layer 2 Features

For efficient management, via Web interface, the VDL-2420M can be programmed for basic switch management functions, such as port speed configuration, port link aggregation, IEEE 802.1Q VLAN and Q-in-Q VLAN, port mirroring, Rapid Spanning Tree, and ACL security. Additionally, the firmware includes advanced features such as IGMP snooping, QoS (Quality of Service), broadcast storm and bandwidth control to enhance bandwidth utilization.

Advanced Security

The VDSL2 DSLAM offers comprehensive Layer 2, Layer 3 and Layer 4 Access Control List (ACL) to filter out unwanted traffic. Its protection mechanisms comprise RADIUS and port-based 802.1X user and device authentication. Moreover, the VDSL2 IP DSLAM provides MAC filter, static MAC, IP/MAC binding and Port Security for enforcing security policies to the edge. The administrators can now construct highly-secure corporate networks with considerably less time and effort than before.

VDSL Interface

24 full-duplex VDSL links via RJ21(Telco 50) connector
24 corresponding POTS lines via RJ21(Telco 50) connector
Built-in POTS splitter for each VDSL port
Auto-speed function for VDSL2 link (by distance and cable quality)

Ethernet Interface

2 Gigabit TP and SFP shared combo interfaces
Auto-MDI/MDI-X detection on Gigabit RJ45 port

VDSL2 Features

Cost-effective VDSL2 link and central management solution
ITU-T G.993.2 VDSL2 standard
DMT (Discrete Multi-Tone) line coding VDSL
ITU-T G.993.2, 8a, 8b, 8c, 8d, 12a, 12b, 17a, 30a profiles
Configurable line template and alarm template
Configurable UPBO, DPBO, USO allowed and virtual noise PSD
Configurable Bitswarp/G.hs carrier set/RFI Band
Symmetric data rate of up to 100/100Mbps
Copper wiring distance up to 1km
Selectable target data rate and target SNR margin
Built-in surge protection against surge damage from high energy spike
Voice and data communication can be shared on the existing telephone wire simultaneously
Supports downstream/upstream rate control on each port

Layer 2 Features

High performance of Store-and-Forward architecture and runt/CRC filtering eliminate erroneous packets to optimize the network bandwidth
Broadcast/multicast/unicast storm control
Supports VLAN
- IEEE 802.1Q tag-based VLAN
- Port-based VLAN
- Q-in-Q tunneling (VLAN stacking)
- GVRP for dynamic VLAN management
- Private VLAN edge (PVE/protected port)
Link Aggregation

- IEEE 802.3ad LACP (Link Aggregation Control Protocol)

- Cisco ether-channel (static trunk)

Spanning Tree Protocol

- STP, IEEE 802.1D

- MSTP, IEEE 802.1s

Port mirroring to monitor the incoming or outgoing traffic on a particular port

Quality of Service

4 priority queues on all switch ports
Traffic classification

- IEEE 802.1p CoS

- IP ToS/DSCP

- Port-based priority

Strict priority and Weighted Round Robin (WRR) CoS policies

Multicast

Supports IGMP snooping v1 and v2
IGMP querier mode support

Security

IEEE 802.1X port-based network access control protocol
RADIUS users access authentication
L2/L3/L4 Access Control List (ACL)
MAC filtering and source IP-MAC/port-binding
Port security for source MAC address entries filtering

Management

Switch Management Interface

- Telnet command line interface

- Web switch management

- SNMP v1, v2c, v3 switch management

DHCP client for IP address assignment
Link Layer Discovery Protocol (LLDP) for easy network management
DHCP option 82 and DHCP relay
Built-in Trivial File Transfer Protocol (TFTP) client
Firmware upgrade via TFTP or HTTP
Configuration upload/download via TFTP or HTTP
Four RMON groups 1, 2, 3, 9 (history, statistics, alarms and events)
SNMP trap for interface Link Up and Link Down notification
Reset button for system management
RJ45 console interface for switch basic management and setup

Hardware Specifications
Hardware Version	1.0
VDSL Interface	24-port VDSL2 Line via 1 RJ21 (Telco 50) connector 24-port POTS/Telephone via 1 RJ21 (Telco 50) connectors
Copper Ports	2 10/100/1000BASE-T RJ45 auto-MDI/MDI-X ports
SFP/mini-GBIC Slots	2 1000BASE-X SFP interfaces, shared with Port-25 and Port-26
Console	1 RS232-to-RJ45 serial port (115200, 8, N, 1)
Transient Voltage Suppressor	IEC 61000-4-2 (ESD): ±8kV (air), ±4kV (contact) IEC 61000-4-4 (EFT): power port 1KV, signal port 0.5KV IEC 61000-4-5 (Lightning): power port 2 KV(1.2/50μs), signal port 1KV(1.2/50μs), 12 ohm
Switch Architecture	Store-and-Forward
Switch Fabric	8.8Gbps/non-blocking
Switch Throughput	6.547Mpps @64bytes
Address Table	8K entries
Shared Data Buffer	512K bytes
Maximum Frame Size	9K bytes
Flow Control	Back pressure for half-duplex IEEE 802.3x pause frame for full-duplex
LED	VDSL2, PWR, SYS, LNK/ACT, 1000
Reset Button	< 5 sec: System reboot > 10 sec: Factory default
Dimensions (W x D x H)	435 x 260 x 67 mm, 1.5U height
Weight	4.3 kg
Power Requirements	100~240V AC, 50-60 Hz
Power Consumption/Dissipation	90 watts (max.)
VDSL2
VDSL2 Standard	Complies with ITU-T G.993.1 and G.993.2. Supports provisioning the VDSL optional band (25K to 138K Hz) usage
Band Plan	Selectable band plan for each VDSL line on a per port basis Band Plan A: - Profile 998, Annex A of G.993.1; optimized for symmetric services Band Plan B: - Profile 997, Annex B of G.993.1; optimized for asymmetric services
Rate Adaptation	Manual RaInit Dynamics
Power Back-Off	Downstream Power Back-Off (DPBO) PSD Upstream Power Back-Off (UPBO) PSD
Encoding	VDSL-DMT
VDSL2 Template	Configurable Line Template Configurable Alarm Template
VDSL2 Features	Selectable rate limit control Selectable target SNR (Signal to Noise Ratio) mode POTS voices passthrough
Layer 2 Function
Management Interface	Console; Telnet; Web browser; SNMP v1, v2c, v3
Gigabit Port Configuration	Port disable/enable Auto-negotiation 10/100/1000Mbps full and half duplex mode selection Flow control disable/enable
Gigabit Port Status	Display each port’s speed duplex mode, link status and flow control status Auto-negotiation status, trunk status
Port Mirroring	TX/RX/both 1 to 1 monitor
Bandwidth Control	Ingress/Egress rate limit control Gigabit Port: • Allow to configure per 128Kbps VDSL2 Port: • Allow to configure per 5Mbps
VLAN	IEEE 802.1Q tag-based VLAN, up to 256 VLAN groups, out of 4094 VLAN IDs Port-based VLAN GVRP, up to 128 dynamic VLAN groups Q-in-Q tunneling Private VLAN Edge (PVE/Protected port) with two protected port groups
Link Aggregation	Static port trunk IEEE 802.3ad LACP (Link Aggregation Control Protocol) Supports 13 groups with 8 ports per trunk
QoS	4 priority queue Traffic classification based on - Port priority - 802.1p priority - DSCP/TOS field in IP Packet VoIP QoS by application protocol no.
IGMP Snooping	IGMP (v1, v2) snooping, up to 256 multicast groups
Access Control List	IP-based Layer 3/Layer 4 ACL Up to 220 ACL rule entries
Security	Port Security (Disable per port of MAC address learning) Static MAC, MAC filter, IP/MAC binding
SNMP MIBs	RFC 1213 MIB-II RFC 2863 Interface MIB RFC 2665 EtherLike MIB RFC 1493 Bridge MIB RFC 2819 RMON MIB (Group 1, 2, 3,9)
Standards Conformance
Regulatory Compliance	FCC Part 15 Class B, CE, VCCI
Standards Compliance	IEEE 802.3 10BASE-T IEEE 802.3u 100BASE-TX IEEE 802.3z 1000BASE-SX/LX IEEE 802.3ab 1000BASE-T IEEE 802.3x Flow control and back pressure IEEE 802.3ad Port trunk with LACP IEEE 802.1D Spanning Tree Protocol IEEE 802.1w Rapid Spanning Tree Protocol IEEE 802.1p Class of Service IEEE 802.1Q VLAN tagging IEEE 802.1X Port Authentication Network Control ITU-T G.993.1 (VDSL) ITU-T G.997.1 ITU-T G.993.2 VDSL2 RFC 768 UDP RFC 793 TFTP RFC 791 IP RFC 792 ICMP RFC 2068 HTTP RFC 1112 IGMP v1 RFC 2236 IGMP v2
Cables	• VDSL2: twisted-pair telephone wires (AWG24 or better) up to 1km • 10/100BASE-TX: 2-pair UTP Cat.5, up to 100m (328ft) • 1000BASE-T: 4-pair UTP Cat.5E, up to 100m • 1000BASE-SX: 50/125µm and 62.5/125µm fiber-optic cable, up to 550m • 1000BASE-LX: 9/125µm fiber optic cable, up to 10km 50/125µm and 62.5/125µm fiber-optic cable, up to 550m
Environment
Operating	Temperature: -10 ~ 50 degrees C Relative Humidity: 10~ 90% (non-condensing)
Storage	Temperature: -20 ~ 70 degrees C Relative Humidity: 10~ 90% (non-condensing)

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