Grandstream Networks BroadWorks BroadSoft GXW-400X User manual

Grandstream Networks, Inc.
Analog IP Gateway GXW400x
4 or 8 FXS Ports
GXW400x User Manual www.grandstream.com
Firmware Version 1.0.0.67 [email protected]

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TABLE OF CONTENTS
GXW400x User Manual
WELCOME....................................................................................................................................................4
GATEWAY GXW400X OVERVIEW ............................................................................................................4
SAFETY COMPLIANCES............................................................................................................................4
WARRANTY ............................................................................................................................................4
CONFIGURE YOUR GXW400X...................................................................................................................5
EQUIPMENT PACKAGING..............................................................................................................................5
CONNECT THE GXW400X...........................................................................................................................5
APPLICATION DESCRIPTION....................................................................................................................7
EXAMPLES OF GXW400X CONFIGURATIONS ................................................................................................7
APPLICATION ONE:GXW-400X FXS GATEWAY CONFIGURATION.............................................................7
APPLICATION TWO:GXW400X &GXW410X SCENARIO /TOLL-FREE CALLING BETWEEN LOCATIONS.......7
GXW400X FEATURES.................................................................................................................................8
SOFTWARE FEATURES OVERVIEW ...............................................................................................................8
HARDWARE SPECIFICATION .........................................................................................................................8
BASIC OPERATIONS................................................................................................................................10
UNDERSTANDING GXW VOICE PROMPTS...................................................................................................10
PLACING A PHONE CALL............................................................................................................................11
PHONE OR EXTENSION NUMBERS..........................................................................................................11
DIRECT IP CALLS..................................................................................................................................11
CALL HOLD...............................................................................................................................................12
CALL WAITING ..........................................................................................................................................12
CALL TRANSFER .......................................................................................................................................12
3-WAY CONFERENCING.............................................................................................................................13
HUNTING GROUP ......................................................................................................................................13
PSTN PASS THROUGH/LIFE LINE ..............................................................................................................14
SENDING AND RECEIVING FAX ...................................................................................................................14
CALL FEATURES......................................................................................................................................15
CONFIGURATION GUIDE .........................................................................................................................16
CONFIGURING GXW400X VIA VOICE PROMPT............................................................................................16
CONFIGURING GXW400X WITH WEB BROWSER....................................................................................17
ACCESS THE WEB CONFIGURATION MENU .............................................................................................17
END USER CONFIGURATION ......................................................................................................................17
IMPORTANT SETTINGS...............................................................................................................................18
NAT SETTINGS.....................................................................................................................................18
DTMF METHODS..................................................................................................................................18
PREFERRED VOCODER (CODEC)........................................................................................................18
END USER CONFIGURATION..................................................................................................................19
ADVANCED USER SETTINGS ......................................................................................................................21
SAVING THE CONFIGURATION CHANGES.....................................................................................................31
REBOOTING FROM REMOTE.......................................................................................................................31
CONFIGURATION THROUGH A CENTRAL SERVER.........................................................................................32
SOFTWARE UPGRADE.............................................................................................................................33
FIRMWARE UPGRADE THROUGH TFTP/HTTP ............................................................................................33
CONFIGURATION FILE DOWNLOAD .............................................................................................................34
FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX........................................................................34
MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD ....................................................................34
RESTORE FACTORY DEFAULT SETTING......................................................................................................35

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TABLE OF FIGURES
GXW400x User Manual
FIGURE 1: DIAGRAM OF GXW400X BACK PANEL .............................................................................................5
FIGURE 2: DIAGRAM OF GXW400X DISPLAY PANEL.........................................................................................6
FIGURE 3: SCREENSHOT OF ADVANCED USER CONFIGURATION......................................................................21
FIGURE 4: SCREEN-SHOT OF SAVE CONFIGURATION PAGE.............................................................................31
FIGURE 5: SCREEN-SHOT OF REBOOTING PAGE.............................................................................................31
TABLE OF TABLES
GXW400x User Manual
TABLE 1: DEFINITIONS OF THE GXW CONNECTORS..........................................................................................5
TABLE 2: DEFINITIONS OF THE GXW DISPLAY PANEL .......................................................................................6
TABLE 3: GXW400X SOFTWARE FEATURES ....................................................................................................9
TABLE 4: HARDWARE SPECIFICATION OF GXW400X .......................................................................................8
TABLE 5: DEFINITIONS OF THE GXW VOICE PROMPTS....................................................................................10
TABLE 6: CALL FEATURES TABLE (STAR CODE).............................................................................................15
TABLE 7: BASIC SETTINGS PAGE DEFINITIONS ...............................................................................................19
TABLE 8: STATUS PAGE DEFINITIONS ............................................................................................................21
TABLE 9: ADVANCED CONFIGURATION PAGE DEFINITIONS..............................................................................22
TABLE 10: FXS PORTS CONFIGURATION DEFINITIONS....................................................................................25
TABLE 11: PROFILE PAGE DEFINITIONS .........................................................................................................26
CONFIGURATION GUI INTERFACE EXAMPLES
GXW400x User Manual
http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar
1. SCREENSHOT OF ADVANCED USER CONFIGURATION PAGE
2. SCREENSHOT OF BASIC SETTINGS CONFIGURATION PAGE
3. SCREENSHOT OF FXS PORTS CONFIGURATION LOGIN PAGE
4. SCREENSHOT OF PROFILE 1CONFIGURATION PAGE
5. SCREENSHOT OF PROFILE 2CONFIGURATION PAGE
6. SCREENSHOT OF STATUS CONFIGURATION LOG-IN PAGE

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WELCOME
Thank you for purchasing the Grandstream GXW400x Analog FXS IP Gateway. The GXW400x offers an
easy to manage, easy to configure IP communications solution for any business with virtual and/or branch
locations. The GXW400x supports popular voice codec and is designed for full SIP compatibility and
interoperability with 3rd party SIP providers, thus enabling you to fully leverage the benefits of VoIP
technology, integrate a traditional phone system into a VoIP network, and efficiently manage
communication costs.
This manual will help you learn how to operate and manage your GXW FXS Analog IP Gateway and
make the best use of its many upgraded features including simple and quick installation, multi-party
conferencing, and direct IP-IP Calling. This IP Analog Gateway is very easy to manage and scalable,
specifically designed to be an easy to use and affordable VoIP solution for the small – medium business
or enterprise.
Gateway GXW400x Overview
The new GXW400x series has a compact and quiet design (no fans) and offers superb audio quality, rich
feature functionality, strong security protection, and good manageability. It is auto-configurable, remotely
manageable and scalable.
The GXW400x features 4 or 8-port FXS interface for analog telephones, dual 10M/100Mbps network
ports with integrated router, PSTN life line in case of power failure, and an RS232 serial port for
administration. In addition, it supports the option of 2 SIP Server profiles, caller ID for various
countries/regions, T.38 fax, flexible dialing plans, security protection (SIPS/TLS), comprehensive voice
codec including G.711 (a/u-law), G.723.1, G.726(16/24/32/48 bit rates), G.729A/B/E and iLBC.
Safety Compliances
The GXW400x is compliant with various safety standards including FCC/CE. Its power adaptor is
compliant with UL standard. Warning: use only the power adapter included in the GXW400x package.
Using an alternative power adapter may permanently damage the unit.
Warranty
Grandstream has a reseller agreement with our reseller customer. End users should contact the company
from whom you purchased the product for replacement, repair or refund.
If you purchased the product directly from Grandstream, contact your Grandstream Sales and Service
Representative for a RMA (Return Materials Authorization) number. Grandstream reserves the right to
remedy warranty policy without prior notification.
Caution: Changes or modifications to this product not expressly approved by Grandstream, or operation
of this product in any way other than as detailed by this User Manual, could void your manufacturer
warranty.
•This document is contains links to Grandstream GUI Interfaces. Please download these examples
http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar for your reference.
•This document is subject to change without notice. The latest electronic version of this user manual
is located @ http://www.grandstream.com/user_manual/GXW400x User_Manual.pdf
Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for
any purpose without the express written permission of Grandstream Networks, Inc. is not permitted.

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CONFIGURE YOUR GXW400X
Connecting your GXW400x is easy. Before you begin, please verify the contents of the GXW400x
package.
EQUIPMENT PACKAGING
Unpack and check all accessories. Equipment includes:
•one 12V universal power adapter
•one Ethernet cable
•one device unit
CONNECT THE GXW400X
Managing the GXW and connecting the unit to the VoIP network is very simple. Follow these four (4)
steps to connect your GXW to the Internet and access the unit’s configuration pages.
1. Connect standard touch-tone analog phones to the FXS1-FXS8 ports.
2. Insert the Ethernet cable into the WAN port of GXW400X and connect the other end of the
Ethernet cable to an uplink port (a router or a modem, etc.)
3. Connect a PC to the LAN port of GXW400X for initial configuration or if it is being used as a
router.
4. Insert the power adapter into the GXW400X and connect it to a wall outlet.
Follow instructions from topic “Configuring GXW 400X with Web Browser” for initial configuration. The
GUI pages will guide you through the remaining steps to set-up your gateway. Examples of the GUI
Interfaces can be downloaded from: http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar.
FIGURE 1: DIAGRAM OF GXW400X BACK PANEL
LAN/WAN
RJ-45 Ethernet
Ports
FXS
Ports
Console
Connection
(PC
connection)
GXW 400x
PSTN
Line
Power
Supply
Reset
TABLE 1: DEFINITIONS OF THE GXW CONNECTORS
LAN (or PC) Connect the LAN port with an Ethernet cable to your PC.
WAN (or LAN) Connect to the internal LAN network or router.
RESET Factory Reset button. Press for 7 seconds to reset factory default settings.
DC 12V Power adapter connection
CONSOLE Console connection for a PC.
PSTN Failover
port When the unit loses power, FXS port 1 will be able to make/receive calls from the
PSTN line connected to this port.
FXS1 - FXS8 FXS port to be connected to analog phones / fax machines.
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Once the GXW is turned on and configured, the front display panel indicates the status of the unit.
FIGURE 2: DIAGRAM OF GXW400X DISPLAY PANEL
FXS port status
GXW400x
Display LEDs
TABLE 2: DEFINITIONS OF THE GXW DISPLAY PANEL
Power LED Indicates Power. Remains ON when Power is connected and turned ON.
Ready LED Remains ON after boot-up.
Console Turns ON when Console port is being used.
LAN LED Indicates LAN (or WAN) port activity
WAN LED Indicates PC (or LAN) port activity
LEDs 1 - 8 Indicate status of the respective FXS Ports on the back panel
Busy - ON (Solid Green)
Available - OFF
Slow blinking FXS LEDs indicates Voice Mail for that port.
NOTE: All LEDs display green when ON. Slow blinking of READY, WAN and LAN LED together
indicates a firmware upgrade or provisioning state. LEDs POWER, READY and WAN are ON when
device is up and running and successfully registered to the SIP Server. Slow blinking of READY LED
indicates that device has not registered with any SIP Service provider.
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APPLICATION DESCRIPTION
There are two scenarios where the GXW400x series can be effectively used to enable any business to
leverage the benefits of VoIP and the Internet.
EXAMPLES OF GXW400X CONFIGURATIONS
Application One: GXW-400x FXS Gateway Configuration
INTERNET
CLOUD
Anywhere in the world
GXW FXS Series
4 or 8 Ports
A
nalog
Phones
FXS Gateway acts as a ‘virtual office’,
connecting analog hones directly to
the gateway p
Application Two: GXW400x & GXW410x Scenario / Toll- Free Calling Between Locations
Branch A -
Boston, MA
4 employees
Branch B – Denver, CO
4 employees
I
In nt te er rn ne et t
C
Cl lo ou ud dGXW400x
GXW410x
Analog
Phones
P
PS ST TN N
C
Cl lo ou ud d
FX0
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GXW400X FEATURES
The GXW400x is a next generation IP voice gateway that is interoperable and compatible with leading IP-
PBXs, Softswitches and SIP platforms. The GXW400x FXS series is auto-configurable, remotely
manageable and scalable. There are two FXS models, the GXW-4004 and GXW-4008, each offering
superb voice quality, traditional telephony functionality, easy deployment, and 4 or 8 FXS ports
respectively. Each model features flexible dialing plans, PSTN failover, integrated call routing to support a
pure IP network call and an external power supply.
SOFTWARE FEATURES OVERVIEW
•4 or 8 FXS ports
•Two RJ-45 ports (switched or routed)
•Multiple SIP accounts & profiles (4 or 8 accounts / choice of 2 profiles per account)
•Supports Voice Codecs:
G711(a/µ, Annex I & II), G723.1A, G726 (ADPCM with 16/24/32/40 bit rates), G729 A/B/E, iLBC
•T.38 Fax
•Comprehensive Dial Plan support for Outgoing calls.
•G.168 Echo Cancellation
•Voice Activation Detection (VAD), Comfort Noise Generation (CNG), and Packet Loss
Concealment (PLC)
•Supports PSTN/PBX analog telephone sets or analog trunks
HARDWARE SPECIFICATION
The hardware specifications of the GXW FXS series are detailed in Table 4.
TABLE 4: HARDWARE SPECIFICATION OF GXW400X
Ports 4 or 8 FXS Ports
LAN interface 2 x RJ45 10/100Mbps (switched or routed)
PSTN Port PSTN fail-over port
LED 4 or 8 LEDs (GREEN)
Console Console port for Hyperterminal login
Universal Switching
Power Adaptor Input: 100-240V AC, 50/60Hz, 0.5A Max Output: 12V DC, 1.25A
UL certified
Dimension 225mm (L) x 135mm (W) x 35mm (H)
Weight 0.29 lbs (3.5 oz)
Temperature 32~104°F / 0~40°C
Humidity 10% - 90% (non-condensing)
Compliance FCC, CE

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TABLE 3: GXW400X SOFTWARE FEATURES
GXW400x FXS Analog Gateway Series
Telephone Interfaces GXW4004: 4 ports, 4 SIP accounts & choice of 2 profiles
GXW4008: 8 ports, 8 SIP accounts & choice of 2 profiles
FXS, RJ-11
Network Interface Two (2) 10M/100 Mbps, RJ-45
LED Indicators Power and Line LEDs
Voice over Packet
Capabilities Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC
(packet loss concealment), AEC with NLP
Packetized Voice Protocol Unit (supports RTP/RTCP and AAL2 protocol),
G.168 compliant Echo Cancellation, Dynamic Jitter Buffer, Modem detection
& auto-switch to G.711
PSTN Fail-over PSTN failover port on power failure
Voice Compression G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder,
G.723.1A, G.726(ADPCM with 16/24/32/40 bit rates), G.729A/B/E, iLBC
G.726 provides proprietary VAD, CNG, and signal power estimation
Voice Play Out unit (reordering, fixed and adaptive jitter buffer, clock
synchronization), AGC (automatic gain control),
Status output, Decoder controlling via voice packet header
DHCP Server/Client Yes, NAT Router or Switched Mode
Fax over IP T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711
for Fax Pass-through,
Fax Datapump V.17, V.19, V.27ter, V.29 for T.38 fax relay
QoS Diffserve, TOS, 802.1 P/Q VLAN tagging
IP Transport RTP/RTCP
DTMF Method flexible DTMF transmission method, User interface of In-audio, RFC2833,
and/or SIP Info
IP Signaling SIP (RFC 3261)
Provisioning TFTP, HTTP, HTTPS (pending)
Control TLS/SIPS
Management Syslog support, HTTPS (pending), Telnet, remote management using Web
browser
Dial Plan Yes
UPnP Support Yes
Power Output: 12VDC / Input: 100–240 VAC/50-60 Hz
Mounting Rack mount, Wall mount, Desktop
Short and long haul REN3: Up to150 ft on 24 AWG line
Caller ID Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
Polarity Reversal /
Wink Yes
EMC EN55022/EN55024 and FCC part15 Class B
Safety UL

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BASIC OPERATIONS
UNDERSTANDING GXW VOICE PROMPTS
GXW400x has a stored voice prompt menu for quick browsing and simple configuration. To enter the
voice prompt menu, press *** on the standard analog phone connected to any FXS port.
TABLE 5: DEFINITIONS OF THE GXW VOICE PROMPTS
Menu Voice Prompt User’s Options
Main Menu “Enter a Menu Option” Enter “*” for the next menu option
Enter “#” to return to the main menu
Enter 01 – 05, 07,10 - 17, 47, 86 or 99 Menu option
01 “DHCP Mode”, “PPPoE Mode
”or “Static IP Mode” Enter ‘9’ to toggle the selection
If user selects “Static IP Mode”, user need configure all the IP
address information through menu 02 to 05. If user selects
“Dynamic IP Mode”, the device will retrieve all IP address
information from DHCP server automatically when user reboots
the device.
02 “IP Address “ + IP address The current WAN IP address is announced
Enter 12-digit new IP address if in Static IP Mode.
03 “Subnet “ + IP address Same as Menu option 02
04 “Gateway “ + IP address Same as Menu option 02
05 “DNS Server “ + IP address Same as Menu option 02
07 Preferred Vocoder Enter “9” to go to the next selection in the list:
•PCM U
•PCM A
•iLBC
•G-726
•G-723
•G-729
10 “MAC Address” Announces the Mac address of the unit.
12 WAN Port Web Access Enter “9” to toggle between enable and disable
13 Firmware Server IP Address Announces current Firmware Server IP address. Enter 12 digit
new IP address.
14 Configuration Server IP
Address Announces current Config Server Path IP address. Enter 12 digit new IP address.
15 Upgrade Protocol Upgrade protocol for firmware and configuration update. Enter “9”
to toggle between TFTP and HTTP
16 Firmware Version Firmware version information.
17 Firmware Upgrade Firmware upgrade mode. Enter “9” to rotate among the following
three options:
1. always check
2. check when pre/suffix changes
3. never upgrade
47 “Direct IP Calling” Enter the target IP address to make a direct IP call, after dial
tone. (See “Make a Direct IP Call”.)
99 “RESET” Enter “9” to reboot the device; or
Enter MAC address to restore factory default setting
(See Restore Factory Default Setting section)
“Invalid Entry” Automatically returns to Main Menu

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Five Success Tips when using the Voice Prompt
1. “*” shifts down to the next menu option
2. “#” returns to the main menu
3. “9” functions as the ENTER key in many cases to confirm an option
4. All entered digit sequences have known lengths - 2 digits for menu option and 12 digits for IP
address. For IP address, add 0 before the digits if the digits are less than 3 (i.e. - 192.168.0.26
should be key in like 192168000026. No decimal is needed).
5. Key entry can not be deleted but the phone may prompt error once it is detected
PLACING A PHONE CALL
PHONE OR EXTENSION NUMBERS
1. Dial the number directly and wait for 4 seconds (Default “No Key Entry Timeout”); or
2. Dial the number directly and press # (Use # as dial key” must be configured in web configuration).
Examples:
1. Dial an extension directly on the same proxy, (e.g. 1008), and then press the # or wait for 4
seconds.
2. Dial an outside number (e.g. [phone]), first enter the prefix number (usually 1+ or
international code) followed by the phone number. Press # or wait for 4 seconds. Check with
your VoIP service provider for further details on prefix numbers.
DIRECT IP CALLS
Direct IP calling allows two parties, that is, a FXS Port with an analog phone and another VoIP Device, to
talk to each other in an ad hoc fashion without a SIP proxy.
Elements necessary to completing a Direct IP Call:
1. Both GXW400x and other VoIP Device, have public IP addresses, or
2. Both GXW400x and other VoIP Device are on the same LAN using private IP addresses, or
3. Both GXW400x and other VoIP Device can be connected through a router using public or private
IP addresses (with necessary port forwarding or DMZ).
GXW400x supports two ways to make Direct IP Calling:
Using IVR
1. Pick up the analog phone then access the voice menu prompt by dial “***”
2. Dial “47” to access the direct IP call menu
3. Enter the IP address using format ex. 192*168*0*160 after the dial tone.
Using Star Code
1. Pick up the analog phone then dial “*47”
2. Enter the target IP address using same format as above.
Note: NO dial tone will be played between step 1 and 2.
Destination ports can be specified by using “*” (encoding for “:”) followed by the port number.

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Examples:
a) If the target IP address is 192.168.0.160, the dialing convention is
*47 or Voice Prompt with option 47, then 192*168*0*160.
followed by pressing the “#” key if it is configured as a send key or wait 4 seconds. In this case,
the default destination port 5060 is used if no port is specified.
b) If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be:
*47 or Voice Prompt with option 47, then 192*168*0*160*5062 followed by pressing the “#” key
if it is configured as a send key or wait for 4 seconds.
NOTE: When completing direct IP call, the “Use Random Port” should set to “NO”. You can not make
direct IP calls between FXS1 to FXS2 since they are using same IP.
CALL HOLD
Place a call on hold by pressing the “flash” button on the analog phone (if the phone has that button).
Press the “flash” button again to release the previously held Caller and resume conversation. If no “flash”
button is available, use “hook flash” (toggle on-off hook quickly). You may drop a call using hook flash.
CALL WAITING
Call waiting tone (3 short beeps) indicates an incoming call, if the call waiting feature is enabled. Toggle
between incoming call and current call by pressing the “flash” button. First call is placed on hold. Press
the “flash” button to toggle between two active calls.
CALL TRANSFER
Blind Transfer
Assume that call Caller A and B are in conversation. A wants to Blind Transfer B to C:
3. Caller A presses FLASH on the analog phone to hear the dial tone.
4. Caller A dials *87 then dials caller C’s number, and then # (or wait for 4 seconds)
5. Caller A will hear the confirm tone. Then, A can hang up.
NOTE: “Enable Call Feature” must be set to “Yes” in web configuration page.
Caller A can place a call on hold and wait for one of three situations:
1. A quick confirmation tone (similar to call waiting tone) followed by a dial tone. This indicates the
transfer is successful (transferee has received a 200 OK from transfer target). At this point,
Caller A can either hang up or make another call.
2. A quick busy tone followed by a restored call (on supported platforms only). This means the
transferee has received a 4xx response for the INVITE and we will try to recover the call. The
busy tone is just to indicate to the transferor that the transfer has failed.
3. Continuous busy tone. The phone has timed out. Note: continuous busy tone does not indicate
the transfer has been successful, nor does it indicate the transfer has failed. It often means there
was a failure to receive second NOTIFY – check firmware for most recent release.
Attended Transfer
Assume that Caller A and B are in conversation. Caller A wants to Attend Transfer B to C:
1. Caller A presses FLASH on the analog phone for dial tone.
2. Caller A then dials Caller C’s number followed by # (or wait for 4 seconds).
3. If Caller C answers the call, Caller A and Caller C are in conversation. Then A can hang up to
complete transfer.
4. If Caller C does not answer the call, Caller A can press “flash” to resume call with Caller B.

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NOTE: When Attended Transfer fails and A hangs up, the GXW400x will ring back user A to remind A
that B is still on the call. A can pick up the phone to resume conversation with B.
3-WAY CONFERENCING
The GXW400x supports Bellcore style 3-way Conference.
Instructions for 3-way conference:
Assuming that call party A and B are in conversation. A (GXW400x ) wants to bring C in a conference:
1. A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial
tone.
2. A dials C’s number then # (or wait for 4 seconds).
3. If C answers the call, then A presses FLASH to bring B, C in the conference.
4. If C does not answer the call, A can press FLASH back to talk to B.
5. If A presses FLASH during conference, C will be dropped out.
HUNTING GROUP
This feature allows the user to setup a single SIP account on the gateway and have the ability to use all
FXS ports to make/receive calls. Using this feature, all ports active in same hunt group will have the same
phone number and incoming calls will be distributed in a round robin manner among the ports active in
that hunt group. The number of hunting groups is limited by the number of ports each GXW model has -
i.e. each port can be its own hunt group. The most practical and efficient way to use hunt groups is to
assign 2 or 3 ports to separate hunt groups.
One additional and popular way to use the Hunting Group feature is called “multiplexed analog lines”. In
this configuration, a legacy PBX system with 8 FXO trunks can be connected to 8 GXW 4008 ports
configured as a hunt group. The GXW can be registered to a SIP server provider using only one phone
number. If the SIP service provider allows multiple calls to the same number, the GXW will allow 8
concurrent calls to the same SIP number. All office members can be reached remotely using the same
phone number in round robin fashion.
Example Configuration of a typical Hunting Group:
1. Configure the SIP account from your VoIP Service Provider on FXS port 1 under FXS Ports
webpage.
2. Select Active under the Hunting Group drop box for FXS port 1.
3. For the remaining ports (say 2, 3 and 4) select 1 for Hunting Group. Ports 2, 3 and 4 are now
active members of the hunting group associated with port 1.
This configuration will route all calls directed to FXS port 1 to ports 2, 3 and/or 4 in round robin fashion
respectively if port 1 is busy or times out. You can configure the ring timeout on the Profile page.
Note: A single call directed to the SIP account will NOT result in all ports ringing at the same time. They
will ring in the hunting group only. This feature is applicable to incoming calls only.

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PSTN PASS THROUGH/LIFE LINE
The RJ-11 line jack on the GXW400x side functions as a pass through jack when the GXW400x is out of
power. The pass through/life line enables the user to use the analog phone for PSTN calls directly
without using an access code.
SENDING AND RECEIVING FAX
GXW400x supports fax in two modes: 1) T.38 (Fax over IP) and 2) Fax Pass through. T.38 is the
preferred method because it is more reliable and works well in most network conditions. If the service
provider supports T.38, please use this method by selecting T.38 as fax mode (default). If the service
provider does not support T.38, pass-through mode may be used. If you have problems with sending or
receiving Fax, toggle the Fax Tone Detection Mode setting.

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CALL FEATURES
The GXW400x supports the traditional telephony features available in a PBX as well as additional
advanced telephony features.
TABLE 6: CALL FEATURES TABLE (STAR CODE)
Key Call Features
*30 Block CallerID (for all-config change)
*31 Send CallerID (for all-config change)
*67 Block CallerID (per call)
*82 Send CallerID (per call)
*47 Direct IP Calling. Dial “*47” + “IP address”. No dial tone will be played in the middle. Detail see
Direct IP Calling section on page 12.
*50 Disable Call Waiting (for all-config change)
*51 Enable Call Waiting (for all-config change)
*69 Call Return Service: Dial *69 and the phone will dial the last incoming phone number received.
*70 Disable Call Waiting (Per Call)
*71 Enable Call Waiting (Per Call)
*72 Unconditional Call Forward: Dial “*72” and then the forwarding number followed by “#”. Wait
for dial tone and hang up. (dial tone indicates successful forward)
*73 Cancel Unconditional Call Forward: Dial “*73” and wait for dial tone, then hang up.
*74 Enable Paging Call: Dial “*74” and then the destination phone number you want to activate in
Paging mode.
*78 Enable Do Not Disturb (DND): When enabled all incoming calls will be rejected.
*79 Disable Do Not Disturb (DND): When disabled, incoming calls will be accepted.
*87 Blind Transfer
*90 Busy Call Forward: Dial “*90” and then the forwarding number followed by “#”. Wait for dial tone
then hang up.
*91 Cancel Busy Call Forward: dial “*91”. Wait for dial tone. Hang up.
*92 Delayed Call Forward: Dial “*92” and then the forwarding number followed by “#”. Wait for dial
tone then hang up.
*93 Cancel Delayed Call Forward: Dial “*93” for a dial tone, then hang up.
Flash/Hook If user hears call waiting beep, flash/hook will switch to the new incoming call. Also used to switch
to a new channel for a new call.
# Pressing pound sign will serve as Re-Dial key.

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CONFIGURATION GUIDE
CONFIGURING GXW400X VIA VOICE PROMPT
DHCP MODE
Select voice menu option 01 to enable GXW400x to use DHCP.
STATIC IP MODE
Select voice menu option 01 to enable GXW400x to use STATIC IP mode, then use option 02, 03, 04, 05
to set up IP address, Subnet Mask, Gateway and DNS server respectively.
FIRMWARE SERVER IP ADDRESS
Select voice menu option 13 to configure the IP address of the firmware server.
CONFIGURATION SERVER IP ADDRESS
Select voice menu option 14 to configure the IP address of the configuration server.
UPGRADE PROTOCOL
Select voice menu option 15 to choose firmware and configuration upgrade protocol. User can choose
between TFTP and HTTP.
FIRMWARE UPGRADE MODE
Select voice menu option 17 to choose firmware upgrade mode among the following three options:
1) always check, 2) check when pre/suffix changes, and 3) never upgrade
WAN PORT WEB ACCESS
Select voice menu option 12 to enable WAN Port Wed Access of the device configuration pages.

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CONFIGURING GXW400X WITH WEB BROWSER
GXW400x has an embedded Web server that will respond to HTTP GET/POST requests. It also has
embedded HTML pages that allow users to configure the GXW400x through a Web browser such as
Microsoft’s IE and AOL’s Netscape.
ACCESS THE WEB CONFIGURATION MENU
The GXW400x HTML configuration menu can be accessed via LAN or WAN port:
From the LAN port:
1. Directly connect a computer to the LAN port.
2. Open a command window on the computer
3. Type in “ipconfig /release”, the IP address etc. becomes 0.
4. Type in “ipconfig /renew”, the computer gets an IP address in 192.168.2.x segment by default
5. Open a web browser, type in the default gateway IP address. http://192.168.2.1. You will see the
login page of the device.
From the WAN port:
The WAN port HTML configuration option is disabled by default from factory. To access the HTML
configuration menu from the WAN port:
1. Enable the “WAN Port Web Access” option via IVR option 12.
2. Find the WAN IP address of the GXW400x using voice prompt menu option 02.
3. Access the GXW400x Web Configuration page via WAN port using the following URL:
http://GXW400x -IP-Address (the GXW400x IP-Address is the WAN IP address for the
GXW400x).
NOTE: If using a web browser to enter the configuration page, strip the leading “0”s because the browser
will parse in octet. (i.e. if the IP address is: 192.168.001.014, please type in: 192.168.1.14).
END USER CONFIGURATION
Once the HTTP request is entered and sent from a Web browser, the user will see a log in screen. There
are two default passwords for the login page:
User Level: Password: Web pages allowed:
End User Level 123 Only Status and Basic Settings
Administrator Level admin Browse all pages
Only an administrator can access the “ADVANCED SETTINGS” configuration page.
1. There are six different tabs (Status, Basic Settings, Advanced Settings, Profile 1, Profile 2 and
FXS Ports) on the top of the screen (after login). To open each page, click on the tab.
2. Click on Profile 1 to enter your SIP Server/ SIP Proxy/Registrar information. Enter the IP Address
(or FQDN) of the Server under: SIP Server and/or Outbound Proxy.
3. Click on FXS ports to enter the extensions or account information. You will need to fill in the
following information for each extension. Once the extensions are configured, you are finished.

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FXS
Port SIP User ID Auth ID Authentication Password Name Profile
1 601 601 *** Ext 1 Profile1
2 602 602 *** Ext 2 Profile1
3 603 603 *** Ext 3 Profile1
4 604 604 *** Ext 4 Profile1
5 605 605 *** Ext 5 Profile1
6 606 606 *** Ext 6 Profile1
7 607 607 *** Ext 7 Profile1
8 608 608 *** Ext 8 Profile1
4. Click Update after changing any setting and then Re-boot to confirm changes.
5. After reboot, check the Status Page to confirm the extensions are successfully registered. You
can now use your standard phones connected to ports FXS1 to FXS8 to make calls.
IMPORTANT SETTINGS
The end-user must configure the following settings according to the local environment.
NOTE: Most settings on the web configuration pages are set to the default values.
NAT Settings
If you plan to keep the gateway within a private network behind a firewall, we recommend using STUN
Server. The following three (3) settings are useful in the STUN Server scenario:
1. STUN Server (under Advanced Settings webpage)
Enter a STUN Server IP (or FQDN) that you may have, or look up a free public STUN Server on the
internet and enter it on this field. If using Public IP, keep this field blank.
2. Use Random Ports (under Advanced Settings webpage)
It really depends on your network settings, so set this parameter to Yes or No, whichever works.
Generally if you have multiple IP devices under the same network, it should be set to Yes. If using a
Public IP address, set this parameter to No.
3. NAT Traversal (under the Profile web pages)
Set this to Yes when gateway is behind firewall on a private network.
DTMF Methods
DTMF Settings are in Profile pages.
•DTMF in-audio
•DTMF via RTP (RFC2833)
•DTMF via SIP INFO
Enable one or more DTMF methods based on your PBX system.
Preferred VOCODER (Codec)
The GXW400x supports a broad range of voice codecs. Under Profile web pages, choose your preferred
order of different codecs:
•PCMU/A (or G711µ/a)
•G729 A/B/E
•G723
•G726 (16/24/32/40)
•iLBC

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END USER CONFIGURATION
The GXW FXS Series uses an imbedded web-browser to simply the configuration process. There are six
(6) screenshots that the end user should become familiar with during the configuration process.
Download these pages now http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar and
review the term definitions found in Tables 7 – 11.
TABLE 7: BASIC SETTINGS PAGE DEFINITIONS
End User Password Password to access the Web Configuration Menu. This field is case sensitive with a
maximum length of 25 characters.
Web Port By default, HTTP uses port 80. This field is for customizable web port.
Telnet Server Default is Yes.
IP Address There are two modes to operate the GXW400x :
DHCP mode: all the field values for the Static IP mode are not used (even though they
are still saved in the Flash memory.) The GXW400x acquires its IP address from the first
DHCP server it discovers from the LAN it is connected.
Using the PPPoE feature: set the PPPoE account settings. The GXW400x will establish
a PPPoE session if any of the PPPoE fields is set.
Static IP mode: configure the IP address, Subnet Mask, Default Router IP address,
DNS Server 1 (primary), DNS Server 2 (secondary) fields. These fields are set to zero by
default.
DHCP hostname This option specifies the name of the client. This field is optional but may be required by
some Internet Service Providers. Default is blank.
DHCP domain This option specifies the domain name that client should use when resolving hostnames
via the Domain Name System. Default is blank.
DHCP vendor class ID Used by clients and servers to exchange vendor-specific information. Default is HT500.
PPPoE account ID PPPoE username. Necessary if ISP requires you to use a PPPoE (Point to Point
Protocol over Ethernet) connection.
PPPoE password PPPoE account password.
PPPoE Service Name This field is optional. If your ISP uses a service name for the PPPoE connection, enter
the service name here. Default is blank.
Time Zone Controls how the date/time is displayed according to the specified time zone.
Self Defined Time Zone The syntax is std offset dst [offset],start[/time],end[/time]
Default is set to : MTZ+6MDT+5,M3.2.0,M11.1.0
MTZ+6MDT+5,
It indicates a time zone with 6 hours offset with 1 hour ahead which is the US
central time.
It is positive (+) if the local time zone is west of the Prime Meridian and negative
(-) if it is east.
Prime Meridian (International or Greenwich Meridian)
M3.2.0,M11.1.0
The 1st number indicates Month: 1,2,3,..,12 (for Jan, Feb, .., Dec)
The 2nd number indicates the nth iteration of the weekday: (1st Sunday, 3rd
Tuesday etc)
The 3rd number indicates Weekday: 0,1, 2, ..,6(for Sun, Mon, Tue, .., Sat)
Therefore, this example is the DST which starts from the second Sunday of
March to the 1st Sunday of November.

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Language Default is English. Languages supported with voice prompt.
Device Mode This parameter controls whether the device is working in NAT router mode or Bridge
mode. Save the setting and reboot prior to configuring the GXW.
NAT maximum ports Maximum NAT ports, typically one connection per port.
NAT TCP timeout NAT TCP timeout in seconds
NAT UDP timeout NAT UDP timeout in seconds.
Uplink Bandwidth ISP specified WAN uplink bandwidth
Downlink Bandwidth ISP specified WAN downlink bandwidth
Enable UPnP support If set to “Yes”, the GXW400x would act as an UPnP gateway for your UPnP enable
applications. UPnP - Universal Plug n Play
Reply to ICMP on WAN
port If set to “Yes”, the GXW400x will respond to the PING command from other computers, but it also is vulnerable to the DOS attack. Default is No.
WAN side HTTP/Telnet
Access If set to “Yes”, user can access the configuration page through the WAN port, instead of
through the “PC” port. Warning: this configuration is less secure than default option.
Default is No.
Cloned WAN MAC Addr This allows you to change/set the MAC address on the WAN interface.
Enable LAN DHCP Default is Yes.
LAN Subnet Mask Sets the LAN subnet mask. Default value is 255.255.255.0
LAN DHCP Base IP Base IP for the LAN port which functions as a Gateway for the subnet.
Default value is 192.168.2.1.
LAN DHCP Start IP Default is 100
LAN DHCP End IP Default is 199
DHCP IP Lease Time Value is set in units of hours. Default value is 120 hrs (5 Days.) The time IP address is
assigned to the LAN clients.
DMZ IP Forward all WAN IP traffic to a specific IP address if no matching port is used by
GXW400x or defined in port forwarding.
Port Forwarding Forwards a matching (TCP/UDP) port to a specific LAN IP address with a specific
(TCP/UDP) port.
In addition to the Basic Settings configuration page, the end user also has access to the Device Status
page.