VDSL Modem VDSL IAD Integrated Access Device with 2.4G/5.0G Dual Wifi VDB1421-W2
● Chipset: BCM63167V+BCM6303+BCM53124+BCM43602
● Interface: 1GWan+4GE+2FXS (POTS)+1*USB2.0
● Wifi: 2.4G 11n 2*2+5G 11ac3*3
● Size:210*181*41mm

  • Specification

1.User Interface

User Interface
Ethernet LAN Four RJ-45 Port (8p8c, Yellow color, unshielded)
10/100M/1000M bps GE
N-way, Automatic speed negotiation supported.
Auto-sensing, auto-detection MDI/ MDI-X
DSL Line One RJ-11(6p2c), Gray color
USB TWO USB connector
Reset button One Reset button
Power Jack DC power jack, 12V/2A input
On/Off Switch One On/Off switch
WPS WPS button
WIFI on/off WIFI button on/off
Wireless Antenna Five Antennas (2.4G*2,5G*3)
Key Components / Connectors / Performance
VDSL2 Chipset BCM63167
VDSL2 LineDriver BCM6303
WIFI Chipset Internal+BCM43602
Flash Memory 128MB
SDRAM for CPU 128MB /256MBDDR3
Console Internal console port (4 pin)
ITU-T K.21 Complied
Interfaces (TR-068 compliant)

4x 10/100/1000Base-TX MDI/MDIX RJ-45 port

Compliant with following standards:

1. IEEE 802.3/802.3u

2. Hardware based 10/100/1000, full/half, flow control autonegotiation

3.Non-blocking wire speed reception andtransmission

4. Full duplex IEEE 802.3x flow control and halfduplex back-pressure flow control

5. Broadcast storm protection

6. Automatic address learning, address aging andaddress migration

7. Integrated address Look-Up Engine, 1 K absoluteMAC addresses supported


1x 10/100/1000Base-TX MDI/MDIX RJ-45 port

Compliant with following standards:

1. IEEE 802.3/802.3u

2. Hardware based 10/100/1000, full/half, flow control autonegotiation

3.Non-blocking wire speed reception andtransmission

DSL Line

1x inner pair RJ-11 VDSL2 port

Data Rate:

Downstream: Max up to100Mbps

Upstream: Max up to 60Mbps

Compliant with xDSL Standard

ITU-T G.993.2 (VDSL2)

Supports VDSL2 band plan: 997 and 998

Supports VDSL2 profiles: 8a, 8b, 8c, 8d, 12a, 12b, 17a

Supports Annex A, B


Simultaneous Wi-Fi 2.4 & 5GHz

At least 4 SSIDs


IEEE 802.11 b/g/n 2.4GHz (Up to 300 Mbps data rates)

IEEE 802.11 ac 5GHz (Up to 1300 Mbps data rates)


• <20dBm at 2.4GHz

• <20dBm at 5GHz


• InternalAntenna at 2.4GHz

InternalAntenna at 5GHz(Optional extranal antenna)

• Wi-FITransmitters/Receivers(Tx/Rx)2x2 (2.4GHz) + 3x3 (5GHz) MIMO Antenna

• Omnidirectional at least 3dBi gain/antenna for 2.4GHz

• Omnidirectional at least 3dBi gain/antenna for 5GHz

2. LED Indicators  

LED Indicative Color Status Description
Power Green/Red Solid Light Power on
Light off Power off
LAN1~4 Green Solid Light Device connected to LAN port
Blinking LAN Activity present
Light off No Activity
WIFI0~1 Green Solid Light Wireless enable
Blinking Date transmission
Light off Wireless disable
WPS Green Solid Light WPS device connected
Light off No WPS device connected
Blinking Negotiating
USB0~1 Green Solid Light Usb connected
Light off No usb connected
Blinking Date transmission
DSL Green Solid Light DSL good sync.
Blinking DSL attempting sync.
Light off No carrier signal
Internet Green /Red Solid Light IP connected
Light off Power off
Wan Green Solid Light Device connected to WAN port
Blinking WAN Activity present
Light off No Activity
VOIP0~1 Green Solid Light Device connected to FXS port
Blinking FXS Activity present
Light off

No Activity


3. S/W Features

Feature Item Feature Detailed Description
ADSL Compliance

T1.413i2, G.992.1

(G.dmt), G.992.2


Annex A (Annex B

and C are optional)



ADSL and ADSL2 dual mode


G.992.5 (ADSL2+) ADSL2+

Annex L (Reach

Extended ADSL2)

Annex M

VDSL Compliance


Vdsl profiles supported: 8a/b/c/d , 12a/b, 17a
Diagnostics mode/DELT
Dying GASP
Virtual Noise
Both Annex A and Annex B Both Annex A and Annex B band plans
WIFI Compliance IEEE 802.11ac/b/g/n

Support 11n 2x2 inner antennas

Support 11ac 3x3innerantennas

Support 2-stream spatial multiplexing up to 270Mbps 2.4G 11n 2x2
Support 3-stream spatial multiplexing up to 1.3Gbps 5G 11ac 3x3
Support MCS 0-15 and MCS 32 modulation and coding rates 2.4G 11n 2x2
Support MCS 0-23 and MCS 32 modulation and coding rates 5G 11ac 3x3
Support 20M and 40M channels 2.4G 11n 2x2
Support 20M40Mand VHT80M channels 5G 11ac 3x3
Support for STBC in both TX and RX 2.4G 11n 2x2
Support for STBC and LDPC in both TX and RX 5G 11ac 3x3
Network Protocols and Features



encapsulations for

bridged or routed


VC-MUX for any connection type
RFC2364 PPP over RFC2364 LLC/NLPID
AAL5 encapsulation for PPPoA

802.1q/1p VLAN

over RFC2684

Bridge encapsulation

802.1q header ion toward

WAN and de-ion toward

LAN over RFC2684 bridge mode

over AAL5. Supports multiple

VLANs on multiple PVCs and

mapping VLANs, PVCs and

physical LAN port to multiple



Support AUTO, PAP, CHAP, MS-

CHAP authentication

Added static IP address



Support AUTO, PAP, CHAP, MS-

CHAP authentication

Added static IP address


Multiple PPPoE

sessions on single


Allows multiple PPPoE sessions

on one PVC.

PPPoE pass-through

Supports concurrent PPPoE

clients inside the modem and

PPPoE clients on the LAN


PPPoE - filtering of

non-PPPoE packets

between WAN and


Previously only filtered non-

PPPoE packet from LAN to WAN,

now works in both directions.


remote staled PPP

sessions at BRAS

Clean up staled PPP sessions

(PPPoE and PPPoA) at ISP

BRAS after ADSL link goes down

then up or after modem reboots, if

scratch pad is enabled on top

boot flash.


MER (a.k.a IP over

Ethernet over AAL5)

WAN to WAN traffic

blocking in bridge


Second IP address

on LAN interface

Only public IP address and no

DHCP on second IP address.

DNS relay

DNS server fallback

in DNS Relay

Launch dnsprobe process when

both primary and secondary

DNS’s are assigned. Probe primary DNS status and fallback

to secondary DNS. When primary

DNS is up again, switch back to

primary DNS.

DHCP server
DHCP client
DHCP Relay

DHCP relay agent for IPoA and

MER type of WAN connections.

IGMP Proxy IGMP v1/v2
IGMP Snooping

IGMPv1/v2 snooping in bridge

mode. Added blocking mode.

RIP v1/v2

Enable RIP over multiple WAN


Dynamic DNS

Automatic WAN IP

address when it is changed to and/or TZO DDNS


LAN port to VC


Supports traffic mapping between

a group of LAN port to a PVC.

Ethernet as WAN


Added Ethernet as WAN interface

to support PPPoE or IP over


Multiple Protocol


Support multiple protocols on

single PVC using VLAN ID

Multiple Service PVC

Support PPPoE, Bridge, and

MER services over a single PVC

Firewall Stateful Inspection SPI Fire Wal

Denial of Service


Passed DOS attacks: ARP

Attack, Ping Attack, Ping of

Death, Land, SYNC, Smurf,

Unreachable,Tear Drop


filtering rules

Support both incoming and

outgoing filtering.

MAC Layer Filtering

Added IGMP in protocol menu.

Filter MAC frames based on

protocol type, source/destination

MAC address, direction

Day-time Parental


VPN IPsec VPN(optional)

Support VPN connection to

remote VPN gateway.




Supported both routed and

bridged mode PVCs for packet

level QoS: classification rules,

priority queuing using ATMTX

queues, IP TOS/Precedence,

802.1p marking. Added DiffServ

DSCP marking and src/dest MAC

addresses classification.

Configuration and Management Web based GUI
Embedded web server

Download image via

HTTP or tftp client

Download image via

FTP server

Download image via

TFTP server

Command Line

Interface via serial

port, telnet, or ssh

added dumpcfg, sntp commands.

Added option to tftp, adsl, wan, ppp commands. Upgrade sshd to version 0.46.

Menu-driven CLI via

serial port or telnet

Added dump configuration.

Universal Plug and

Play (UPnP) Internet

Gateway Device


V2.14L.02: Upgraded UPnP with latest version.

Added support for ADSL IGD. Enable/disable UPnP without reboot.

SNMP v1/v2c agent(optional)

SNMP MIBs: rfc2662

ADSL line MIB,

rfc2515 ATM MIB,


Support GET only except

GET/SET for system MIB and

ifAdminStatus in ifTable.


from SNTP Internet

Time Server

Automatic synchronize date and time with Internet Time Servers and local time zone setup.

Display Date/time in device info and syslog. Added SNTP command.

Daylight saving zone
TR-69(optional) Compliance with Brandband forum standard.
VoIP (Protocol/Feature Supported) SIP RFC 3261
SDP RFC 2327
Outbound proxy
Session timer RFC 4208
3-way conference calls
Support main and backup SIP server using fully qualified domain name (FQDN) or IP Address
Call Forward
Call Hold
Call waiting
Support Codec priority configuration
Signal Processing (VoIP) G.711( A law & u Law) – 64 kbps
G.722 – 64kbps(wideband)
G.723.1 – 5.3/6.3 kbps
G.726 – 32 kbps
G.729A – 8 kbps
G.168 Echo Cancellation
Silence suppression
Adaptive jitter buffer
Voice activity detector(VAD)
Comfort noise generation(CNG)
Selectable Rx/Tx gain control
Fax Pass-Through
T.38 Fax Relay
DTMF In band & Out of bandTone Detection & generation (RFC2833)
Caller ID
Support Tones with able country profile

4. Environment 


Operating Temperature 0℃~40℃ (32℉~104℉);
Storage Temperature -20℃~70℃ (-40℉~158℉)
Operating Humidity 0 to 95% RH
Storage Humidity 0 to 95% RH