Grandstream Networks GHP6 Series User manual

Grandstream Networks, Inc.
GHP6XX Series
GHP6XX – Administration Guide

GXW42XX Series – User Manual
Thank you for purchasing the Grandstream GXW42XX Analog FXSIP Gateway. The GXW42XX offers an easy to manage, easy to
configure IP communications solution for any business with virtual and/or branch locations. The GXW42XX supports popular
voice codecs and is designed for full SIP compatibility and interoperability with third 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 GXW42XX OVERVIEW
The new GXW42XX series has a compact and quiet design and offers superb audio quality, rich feature functionality, strong
security protection, and good manageability. It is auto-configurable, remotely manageable and scalable.
The GXW42XX series features 16, 24, 32 or 48port FXS interface for analog telephones, dual 10/100/1000Mbps network ports,
and RJ21analog port. In addition, it supports the option of 4 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(16/24/32/40 bit rates), iLBC and G.729.
Safety Compliances
The GXW42XX is compliant with various safety standards including FCC/CE. Its power adapter is compliant with UL standard.
Warning:
Use only the power adapter included in the GXW42XX package. Use of alternative power adapter may permanently damage the
unit.
Warranty:
Grandstream has a reseller agreement with our reseller customers. End users should contact the company from whom the
product was purchased, for replacement, repair, or refund.
If you purchased the product directly from Grandstream, contact your Grandstream Support for an RMA (Return Materials
Authorization) number. Grandstream reserves the right to change the 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.
Warning
Once the GXW42xx V2 device is upgraded to 1.0.7.2, it cannot be downgraded to 1.0.5.4 or an earlier version due to the addition
of 2nd generation individual certificates.
Note

CONNECT YOUR GXW42XX GATEWAY
Connecting the GXW42XX gateway is easy. Before you begin, please verify the contents of the GXW42XX package.
Equipment Packaging
Unpack and check all accessories. Equipment includes:
one device unit
one RJ45 Ethernet cable
one 12V 5A universal power adapter (24V 6.25A for GXW4248)
mount
Connect the GXW42XX
Follow these four (4) steps to connect your GXW42XX gateway to the Internet and access the unit’s configuration pages.
1. Connect standard touch-tone analog phones to the GXW42XX’s RJ21 port with a RJ11 to R21 cable.
2. Insert anRJ45 Ethernet cable into the WAN port of GXW42XX and connect the other end to an uplink port (a router or a
modem, etc.)
3. Plug the power adapter into the GXW42XX gateway into a power outlet.
Follow the instructions from the topic “Configuring GXW 42XX with Web Browser” for initial configuration. The GUI pages will
guide you through the remaining steps to set-up your gateway.
GXW42xx V2 device uses a different firmware file from the GXW42xx V1 device. Please use the correct firmware file for V1 and
V2 devices. To distinguish GXW42xx V2 device from V1 device, please check the label on the back of the device.
(1) GXW42xx V2 has “V2” printed for model name. For example, “Model: GXW4216 V2”. If the model’s name doesn’t have V1 or
V2 printed, the device is GXW42xx V1.
(2) GXW42xx V2 has the device password printed on the label. GXW42xx V1 does not have it.

Figure 1: Diagram of GXW4216/24/32/48 Panel
Ethernet port Connect to the internal LAN network or router
RESET Factory Reset button. Press and hold for a while to reset factory default settings.
DC IN Power adapter connection
Analog port Connect to analog phones / fax machines with an RJ21 to RJ11 cable
FXS ports FXS port to be connected to analog phones / fax machines.
Table 1: Definitions of the GXW Connectors
Once the GXW42XX is turned on and configured, the front display panel indicates the status of the unit.

Act LED Remains ON if plug the network cable.
LINK LED Indicates Ethernet port activity.
FXS LED
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.
All FXS LEDs slow blinking indicates provisioning.
Table 2: Definitions of the GXW Display Panel
Pin Signal Pin Signal
1RING1 26 TIP1
2RING2 27 TIP2
3RING3 28 TIP3
4RING4 29 TIP4
5RING5 30 TIP5
6RING6 31 TIP6
7RING7 32 TIP7
8RING8 33 TIP8
9RING9 34 TIP9
10 RING10 35 TIP10
11 RING11 36 TIP11
12 RING12 37 TIP12
13 RING13 38 TIP13
14 RING14 39 TIP14
15 RING15 40 TIP15
16 RING16 41 TIP16

Pin Signal Pin Signal
17 RING17 42 TIP17
18 RING18 43 TIP18
19 RING19 44 TIP19
20 RING20 45 TIP20
21 RING21 46 TIP21
22 RING22 47 TIP22
23 RING23 48 TIP23
24 RING24 49 TIP24
Figure 2: 50 Pin Telco Connector
GXW42XX FEATURES
The GXW42XX is a next generation IP voice gateway that is interoperable and compatible with leading IP-PBXs, Soft switches
and SIP platforms. The GXW42XX FXS gateway is auto-configurable, remotely manageable and scalable. The GXW42XX
gateways come in four models – the GXW4216, GXW4224, GXW4232and GXW4248, each offering superb voice quality,
traditional telephony functionality, easy deployment, and 16, 24,32 and 48FXS ports respectively. Each model features flexible
dialing plans, integrated call routing to support a pure IP network call and an external power supply.
Software Features Overview
16, 24, 32 or 48FXS ports (no front panel FXS ports on GXW4248)
RJ-45 Ethernet ports
4 configurable SIP profiles
Supports Voice Codecs:
G711 (a/µ, Annex I & II), G723.1A, G726 (ADPCM with 16/24/32/40 bit rates), G729 A/B, 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)
For GXW4216, only first 16 pairs are connected.
For GXW4232, first 24 pairs on 1 RJ21 connector and first 8 pairs on the 2 RJ21 connector are connected.
For GXW4224 and GXW4248, the last pair of pin 25 and 50 on each RJ21 is not connected.
All LED lights display green when ON.
LINK LED and ACT LED blinking in following status indicate different network speed.
10M: LINK and ACT all blink, ACT blinks faster than LINK
100M: LINK and ACT all blink, ACT blinks the same fast as LINK
1000M: LINK does not blink, only ACT blink
Slow blinking of FXS LED together indicates a firmware upgrade or provisioning state.
st nd

Supports PSTN/PBX analog telephone sets or analog trunks
GXW4216 GXW4224 GXW4232 GXW4248
Telephone
Interfaces 16 FXS ports 24 FXS ports 32 FXS ports 48 FXS ports
SIP
Provisioning
16 SIP accounts, 4
profiles
24 SIP accounts, 4
profiles
32 SIP accounts, 4
profiles
48 SIP accounts, 4
profiles
Network
Interface 10/100/1000 Mbps, RJ-45
Number of
Concurrent
Calls (except
when using
SRTP)
16 Concurrent Calls 24 Concurrent Calls 32 Concurrent Calls 48 Concurrent Calls
Voice over
Packet
Capabilities
Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC (packet loss concealment),
LEC with NLP Packetized Voice Protocol Unit (supports RTP and AAL2 protocol), G.168 compliant Echo
Cancellation, Dynamic Jitter Buffer, Modem detection & auto-switch to G.711
Voice
Compression
G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder, G.722, G.723.1A, G.726(ADPCM
with 16/24/32/40-bit rates), G.729, 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 DHCP Client only
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.21, V.27ter, V.29 for T.38 fax relay
QoS DiffServ, TOS, 802.1P/Q VLAN tagging
Transport
Protocol RTP
DTMF Method In-audio, RFC2833, and/or SIP Info
IP Signaling SIP (RFC 3261)
Provisioning TFTP, HTTP, HTTPS
Security SRTP, TLS/SIPS, HTTPS, 802.1x
Management Syslog support, HTTP/HTTPS and SSH access
Dial Plan Yes
3-way
Conference 3-Way conference with local mixing
Caller ID Bellcore Type 1 & 2, ETSI, BT, NTT, FSK and DTMF-based CID

Table 3: GXW42xx Software Specifications
Hardware Specification
The hardware specifications of the GXW FXS series are detailed in Table 4.
Polarity
Reversal / Wink Yes
Network
Connectivity
IPv4, TCP/UDP, RTP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, SSH, PPPoE, STUN, DDNS,
OpenVPN®
GXW4216 GXW4224 GXW4232 GXW4248
Telephone
Interfaces
16 RJ11 Ports/
1 RJ21 Port
24 RJ11 Ports/
1 RJ21 Port
32 RJ11 Ports/
2 RJ21 Ports 2 RJ21 Ports only
FXS LEDs 16 24 32 48
Network
Interface LAN, Single 10/100/1000 BASE-TX, RJ45
Power Input
Input:100-240VAC, 50/60Hz
Output: 12V DC, 5.0A (4216/24/32)
24V DC, 6.25A (4248 only)
LCD Screen 128x32 pixel
Telco
Connector 1 RJ21 (50 pins) 1 RJ21 (50 pins) 2 RJ21 (50 pins) 2 RJ21 (50 pins)
RJ-11
Connectors Yes Yes Yes No
Function
Buttons 1 button for Reset/Factory Reset
Environmental
Operation: 0°C to 45°C
Storage: -20°C to 60°C
Humidity: 10％ to 90% Non-condensing
Mounting Desktop and Rack mount
On-hook
Voltage Fixed, 48V
Ring Voltage 50Vrms (balanced ringing)
Ring
Frequency 20-50 Hz
Short Haul
Loop
2REN: Up to 2km on 24
AWG wire
2REN: Up to 2km on 24
AWG wire
2REN: Up to 2km on 24
AWG wire
2REN: Up to 2km on 24
AWG wire
Outdoor
Protection Over-voltage Protection and surge immunity

Table 4: GXW42xx Hardware Specifications
GXW42XX LCD Menu
The GXW42XX gateway series includes a small LCD screen for the display of basic information. The LCD has a display area of
128×32 pixels, which will allow for 2 lines of text with a 16px height limitation per line.
The LCD menu is showed as Figure 3: LCD Menu. Menu is navigated by the Down-arrow and OK button.
Figure 3: LCD Menu
BASIC OPERATIONS
Understanding GXW Voice Prompts
GXW42XX has a built-in voice prompt menu for simple device configuration. To enter the voice prompt menu, press *** on
the standard analog phone which is connected to device’s FXS port.
Signaling FXS Loop-start
EMC EN55022/EN55024 and FCC part15 Class B
Safety UL
Compliance FCC, CE, C-Tick

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 “001 – 005,007, 010, 013 – 017,047, 086 or 099” Menu option
Enter “9” for confirming an option
001
“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 002 to 005. If user selects “Dynamic IP Mode”, the device will retrieve all
IP address information from DHCP server automatically when user reboots the device.
002 “IP Address “ + IP
address
The current WAN IP address is announced
Enter 12-digit new IP address if in Static IP Mode.
003 “Subnet “ + IP address Same as Menu option 002
004 “Gateway “ + IP
address Same as Menu option 002
005 “DNS Server “ + IP
address Same as Menu option 002
007 Preferred Vocoder
Enter “9” to go to the next selection in the list:
PCMU
PCMA
iLBC
G-726
G-723
G-722
G-729
010 “MAC Address” Announces the Mac address of the unit.
013 Firmware Server IP
Address Announces current Firmware Server IP address. Enter 12-digit new IP address.
014 Configuration Server
IP Address Announces current Config Server Path IP address. Enter 12-digit new IP address.
015 Upgrade Protocol Upgrade protocol for firmware and configuration update. Enter “9” to toggle between
TFTP and HTTP
016 Firmware Version Firmware version information.
017 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

Menu Voice Prompt User’s Options
047 “Direct IP Calling” Enter the target IP address to make a direct IP call, after dial tone. (See “Make a Direct IP
Call”.)
086 Voice Mail Number of voice mails
099 “RESET”
Enter “9” to reboot the device; or
Enter MAC address to restore factory default setting
(See Restore Factory Default Setting section)
700-
748
Phone calls between
different ports of the
same GW42xx
GXW42XX support inter-port calling from voice menu for easy test/verification in factory
“700” Ring all ports and connect to first port pick up the call
“701-732” Call individual port
“Invalid Entry” Automatically returns to Main Menu
Table 5: Definitions of the GXW Voice Prompts
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 cannot 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 (To change the default value, modify the following setting – “No Key Entry
Timeout”)
2. Or, you may dial the number directly and press # (Use # as dial key” must be configured in web configuration).
Examples: Dial a 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 GXW42XX and other VoIP Device, have public IP addresses, or
2. Both GXW42XX and other VoIP Device are on the same LAN using private IP addresses, or
3. Both GXW42XX and other VoIP Device can be connected through a router using public or private IP addresses (with
necessary port forwarding or DMZ).

GXW42XX 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 “047” 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.
Examples:
1. If the target IP address is 192.168.0.160, the dialing convention is
*47 or Voice Prompt with option 047, 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.
2. If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be:
*47 or Voice Prompt with option 047, then 192*168*0*160*5062 followed by pressing the “#” key if it is configured as a
send key or wait for 4 seconds.
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 (Repeated short beeps as long as the caller is still calling) 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”:
1. Caller A presses FLASH on the analog phone to hear the dial tone.
2. Caller A dials *87 then dials caller C’s number, and then # (or wait for 4 seconds).
3. Caller A will hear the confirm tone. Then, A can hang up.
When completing direct IP call, the “Use Random Port” should set to “NO”.
“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.
3-Way Conferencing
The GXW42XX supports Bellcore style 3-way Conference.
Instructions for 3-way conference:
Assuming that call party A and B are in conversation. A (GXW42XX) 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.
6. If A hangs up, the conference will be terminated or transfer B to C if “Transfer on Conference Hangup” set to yes
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 Hunting Group will have the same phone number and incoming
calls will be distributed in a Linear or Circular manner among the ports active in that Hunting 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 Hunting Group. The most
practical and efficient way to use Hunting Groups is to assign 2 or 3 ports to separate Hunting 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 42xxports configured as a Hunting 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 a 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.
When Attended Transfer fails and A hangs up, the GXW42XX 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.

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.
Example configuration of a multiple Hunting Group:
FXS Port #1: SIP UserID and Authenticate ID entered, Hunting Group set to “Active”
FXS Port #2: SIP UserID and Authenticate ID left blank, Hunting Group set to “1”
FXS Port #3: SIP UserID and Authenticate ID left blank, Hunting Group set to “1”
FXS Port #4: SIP UserID and Authenticate ID entered, Hunting Group set to “Active”
FXS Port #5: SIP UserID and Authenticate ID left blank, Hunting Group set to “4”
FXS Port #6: SIP UserID and Authenticate ID left blank, Hunting Group set to “4”
FXS Port #7: SIP UserID and Authenticate ID entered, Hunting Group set to “Active”
FXS Port #8: SIP UserID and Authenticate ID left blank, Hunting Group set to “7”
…
Hunting Group 1 contains ports 1, 2, 3. Hunting Group 4 contains ports 4, 5, 6.
Hunting Group 7 contains ports 7, 8.
Please be aware, the choice of 1 for ports 2 and 3, the choice of 4 for ports 5 and 6, the choice 7 for port 8 is required to
indicate that the SIP account tied to port marked as “Active” will be used for all members of the same Hunting group.
Needless to say, those members of the same Hunting group may not be sequential ports. In following example ports 3, 5 and
7 tied to SIP Account configured in Port #1 marked as “Active”, and ports 4,6,8 tied to SIP Account configured in Port #2
marked as “Active” as well.
Example of not sequential configuration of a multiple Hunting Group:
FXS Port #1: SIP UserID and Authenticate ID entered, Hunting Group set to “Active”
FXS Port #2: SIP UserID and Authenticate ID entered, Hunting Group set to “Active”
FXS Port #3: SIP UserID and Authenticate ID left blank, Hunting Group set to “1”
FXS Port #4: SIP UserID and Authenticate ID left blank, Hunting Group set to “2”
FXS Port #5: SIP UserID and Authenticate ID left blank, Hunting Group set to “1”
FXS Port #6: SIP UserID and Authenticate ID left blank, Hunting Group set to “2”
FXS Port #7: SIP UserID and Authenticate ID left blank, Hunting Group set to “1”
FXS Port #8: SIP UserID and Authenticate ID left blank, Hunting Group set to “2”
…
FXS Port #24:SIP UserID and Authenticate ID left blank, Hunting Group set to “2”
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.
FXS Name: GXW will use CID name from FXS port initiating the outgoing call if the “Name” field is entered for that specific
port.

There are two types of hunting groups, Linear and Circular. Linear style will sort the call to the lowest-numbered available line,
this is also called “serial hunting”. Circular style will distribute the calls “round-robin”. If a call is assigned to line 1, the next call
goes to 2 and the next to 3. The succession throughout each of the lines continues even if one of the previous lines becomes
available. When the end of the hunt group is reached, the hunting starts over at the first line. Lines are skipped if they are still
busy on a previous call. These two hunting styles can be configured from the Profile X page.
Inter-Port Calling
In some cases, a user may want to make phone calls between the phones connected to multiple ports of the same gateway
when it is used as a standalone unit, without the use of a SIP server. This feature will also be applicable when the gateway is
used with Hunting Groups and is registered to SIP server only with one master number. In such cases, users still will be able to
make inter-port calls by using the IVR feature.
For example, on the GXW42XX inter-port calling is achieved by dialing *** and 7 plus two extra digits corresponding to the
port number. For example, the user connected to port 1 can be reached by dialing *** and 701; the user connected to port 24
can be reached by dialing *** 724.
Sending and Receiving Fax
GXW42XX 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.
CALL FEATURES
GXW42XX supports the traditional telephony features available in a PBX as well as additional advanced telephony features.
Key Call Features
*02 Forcing a Codec (per call): *027110 (PCMU), *027111 (PCMA), *02723 (G723), *02729 (G729), *0272616 (G726-
r16), *0272624 (G724-r24), *0272632 (G726-r32), *0272640 (G726-r40), *027201 (iLBC)
*03 Disable LEC (pe call) Dial “*03” +” number”. No dial tone is played in the middle.
*16 Enable SRTP
*17 Disable SRTP
*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)

Key Call Features
*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.
*98 Play registration ID: Dial “*98”, the registration ID will be announced.
*99 Provision start: Dial “*99”, the provisioning process will be triggered.
Flash/H
ook
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.
Table 6: Call Features Table (Star Code)
CONFIGURATION GUIDE
Configuring GXW42XX via Voice Prompt
DHCP Mode
Select voice menu option 001 to enable GXW42XX to use DHCP.
STATIC IP Mode
Select voice menu option 001 to enable GXW42XX to use STATIC IP mode, then use option 002, 003, 004, 005 to set up IP
address, Subnet Mask, Gateway and DNS server respectively.
PPPoE Mode

Select voice menu option 001 to enable GXW42XX to use PPPoE mode.
Firmware Server IP Address
Select voice menu option 013 to configure the IP address of the firmware server.
Configuration Server IP Address
Select voice menu option 014 to configure the IP address of the configuration server.
Upgrade Protocol
Select voice menu option 015 to choose firmware and configuration upgrade protocol. User can choose between TFTP, HTTP,
and HTTPS.
Firmware Upgrade Mode
Select voice menu option 017 to choose firmware upgrade mode among the following three options:
1) Always check,
2) check when pre/suffix changes,
3) never upgrade
Configuring GXW42XX with Web Browser
The GXW42XX series gateway has an embedded Web server that allows users to configure the GXW42XX through a web
browser. It has language support to English, Chinese, French, Russian, and Spanish.
Access the Web Configuration Menu
The GXW42XX HTML configuration menu can be accessed via Ethernet port:
To access the HTML configuration menu from the Ethernet port:
1. Follow table 4 to find the Ethernet port IP address.
2. Open a web browser, type in the IP address – for example: http://GXW42XX -IP-Address (the GXW42XX IP-Address is the
Ethernet IP address for the GXW42XX).
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 Username Password Web Pages Allowed
End User Level user 123 Only Status and Basic Settings
Administrator
Level admin
admin (for V1)
Random password available on the sticker
(for V2)
Browse all pages
Viewer Level viewer viewer View all pages. Not allowed to modify the
content.
The IVR announces 12 digits IP address, you need to strip out the leading “0” in the IP address. For ex. IP address:
192.168.001.014, you need to type in http://192.168.1.14 in the web browser.

The password is case sensitive with maximum length of 25 characters. Only an administrator can access the “ADVANCED
SETTINGS”, “Profile 1~4”, and “FXS Ports” configuration pages.
Important Settings
The end-user must configure the following settings according to the local environment.
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. 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
You can enable set priority of DTMF methods according to your preference, from Priority 1 to 3. This setting should be based
on your server DTMF setting.
Preferred Vocoder (Codec)
The GXW42XX supports a broad range of voice codecs. Under Profile web pages, choose your preferred order of different
codecs:
PCMU/A (or G711µ/a)
G729
G723
G726 (16/24/32/40)
G722
iLBC
AAL2 (all G726)
PAGE DEFINITIONS
This section will describe the options in the Web configuration user interface. As mentioned, a user can log in as an
administrator or end-user.
Functions available for the end-user are:
Most settings on the web configuration pages are set to the default values.

STATUS: Displays the network status, account status, software version and MAC-address of the phone
MAINTENANCE: Basic settings such as basic network, date and time settings, and web/SSH access settings can be set
here.
PROFILE – AUDIO SETTINGS: DTMF, Vocoder, and Analog Line settings can be configured here for each port.
Additional functions available to administrators are:
MAINTENANCE: Full settings for network, upgrade/provisioning, TR-069, Security and Syslog.
ADVANCED SETTINGS: To set advanced Ring Tongs, FXO Failover, and System Features.
PROFILE X: To configure each of the SIP accounts.
FXS PORTS: To configure each of the FXS ports and Hunting Groups etc.
Status
System Info
Product
Model Contains the product model info.
Part
Number Product Part Number.
Softwar
e
Version
Program: This is the main software release. This number is always used for firmware upgrade. Current version is
1.0.7.2
System
Up Time Shows system uptime since the last reboot.
System
Time The time according to NTP server.
Service
Status Shows the status of the VOIP applications.
Network Status
MAC
Address
The device ID in hexadecimal format. This is needed for Internet Service Provider troubleshooting. The MAC
address will be used for provisioning and can be found on the label on original box and on the label located on the
bottom panel of the device.
IP
Address
Mode
Shows the current IP mode.
IP
Address Shows IP address of GXW42XX
Subnet
Mask Shows Subnet Mask of GXW42XX.
Gateway Shows Default Gateway of GXW42XX.
DNS
Server Shows DNS Server of GXW42XX.

Table 7: Status
Maintenance
Network Settings
NAT
Traversa
l
Shows type of NAT the GXW42XX is connected to via its WAN port. It is based on STUN protocol.
Port Status
Displays relevant information regarding the individual FXS ports.
Call Features Status
Displays relevant information regarding the Call Features.
Network Settings for Service Interface
IP Address Mode for Service
Interface
Choosehow the IP address obtained on the gateway for Service Interface
●DHCP (default)
●PPPoE
●Static IP
Preferred DNS Server Enter the preferred DNS server that should be used for DHCP and PPPoE.
DHCP Settings
Host name (Option 12) Specifies the name of the client. This field is optional but may be required by
Internet Service Providers.
DHCP Domain Specifies the DHCP Domain. This value is optional but may be required by Internet
Service Providers.
Vendor Class ID (Option 60) Used by clients and servers to exchange vendor class ID.
Default is "GXW4200"
Client Circuit ID (Option 82) Used to Encode an Agent-Local identifier of the circuit, Circuit ID sub-option is
supposed to include information specific to which circuit the request came in on.
Remote Agent ID (Option 82)
The relay agent may use this field in addition to or instead of Agent Circuit ID field.
The remote ID sub-option carries information relating to the remote host end of the
circuit
PPPoE Settings
PPPoE Account ID Configures PPPoE Account ID.
PPPoE Password Configures PPPoE Password.
PPPoE Service Name Specifies a name for PPPoE.