Grandstream Networks DUAL FXS PORT HT502 User manual

Grandstream Networks, Inc.
HT502
Dual FXS Port
Analog Telephone Adaptor
User Manual

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HT502 User Manual
COPYRIGHT
©2016 Grandstream Networks, Inc. http://www.grandstream.com
All rights reserved. Information in this document is subject to change without notice. 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.
The latest electronic version of this guide is available for download here:
http://www.grandstream.com/support
Grandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc.
in the United States, Europe and other countries.
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 guide, could void your manufacturer warranty.
SAFETY COMPLIANCE
The HT502 adaptor complies with FCC/CE and various safety standards. The HT502 power adaptor is
compliant with UL standard. Only use the universal power adapter provided with the HT502 package.
The manufacturer’s warranty does not cover damages to the device caused by unsupported power
adaptors.

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HT502 User Manual
GNU GPL INFORMATION
HT502 firmware contains third-party software licensed under the GNU General Public License (GPL).
Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public
License (GPL) for the exact terms and conditions of the license.
Grandstream GNU GPL related source code can be downloaded from Grandstream web site from:
http://www.grandstream.com/sites/default/files/Resources/ht5xx_gpl.tar.gz.

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HT502 User Manual
Table of Contents
CHANGE LOG................................................................................................................6
Changes from 1.0.15.5 User Manual.....................................................................................................6
Changes from 1.0.14.1 User Manual.....................................................................................................6
Changes from 1.0.13.3 User Manual.....................................................................................................6
Changes from 1.0.12.4 User Manual.....................................................................................................7
Changes from 1.0.12.1 User Manual.....................................................................................................7
Changes from 1.0.11.3 User Manual .....................................................................................................7
Changes from 1.0.10.9 User Manual.....................................................................................................7
Changes from 1.0.9.1 User Manual.......................................................................................................7
Changes from 1.0.7.6 User Manual.......................................................................................................8
Changes from 1.0.6.8 User Manual.......................................................................................................8
GUI INTERFACE EXAMPLES........................................................................................9
Welcome ......................................................................................................................10
Connect your HT502 ................................................................................................... 11
Equipment Packaging.......................................................................................................................... 11
Connecting the HT502......................................................................................................................... 11
Product Overview........................................................................................................16
Software Features Overview ...............................................................................................................16
Hardware Specification........................................................................................................................19
Basic Operations.........................................................................................................20
Understanding HT502 Voice Prompt ...................................................................................................20
Placing a Phone Call............................................................................................................................22
Phone or Extension Numbers.......................................................................................................22
Direct IP Calls ...............................................................................................................................23
Call Hold ..............................................................................................................................................24
Call Waiting..........................................................................................................................................24
Call Transfer.........................................................................................................................................24
3-Way Conferencing ............................................................................................................................25
Fax Support .........................................................................................................................................26

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HT502 User Manual
Call Features................................................................................................................27
Configuration Guide.................................................................................................... 29
Configuring the HT502 through Voice Prompts ...................................................................................29
Configuring the HT502 Via Web Browser............................................................................................30
Access the Web Configuration Menu ...........................................................................................30
Important Settings................................................................................................................................31
NAT Settings .................................................................................................................................31
DTMF Methods .............................................................................................................................32
Preferred VOCODER (Codec)......................................................................................................32
Advanced User Configuration..............................................................................................................40
Saving the Configuration Changes ......................................................................................................61
Rebooting the HT502 from Remote.....................................................................................................61
Configuration through a Central Server ...............................................................................................62
Software Upgrade........................................................................................................63
Firmware Upgrade through TFTP/HTTP/HTTPS.................................................................................63
Instructions Local Firmware Upgrade: .................................................................................................64
Configuration File Download................................................................................................................64
Firmware and Configuration File Prefix and Postfix ............................................................................65
Managing Firmware and Configuration File Download........................................................................65
Restore Factory Default Setting.................................................................................67
FACTORY RESET ...............................................................................................................................67
Reset Button ........................................................................................................................................67
IVR Command .....................................................................................................................................67
EXPERIENCING THE HT502 .......................................................................................69

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HT502 User Manual
Table of Tables
Table 1: Definitions of the HT502 connectors .............................................................................................12
Table 2: Definitions of the HT502 LEDs ......................................................................................................13
Table 3: Advanced definitions of the HT50x LEDs patterns........................................................................13
Table 4: HT502 Technical specifications .....................................................................................................16
Table 5: HT502 Hardware specification ......................................................................................................19
Table 6: HT502 IVR Menu definitions .........................................................................................................20
Table 7: HT502 Call features ......................................................................................................................27
Table 8: Basic settings ................................................................................................................................33
Table 9: Status page ...................................................................................................................................38
Table 10: Advanced settings .......................................................................................................................40
Table 11: Account settings...........................................................................................................................47
Table of Figures
Figure 1: Connecting the HT502 .................................................................................................................12
Figure 2: HT502 Connection diagram.........................................................................................................15
Figure 3: Uplink/Downlink bandwidth limitation...........................................................................................38

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HT502 User Manual
CHANGE LOG
This section documents significant changes from previous versions of HT502 user manuals. Only major
new features or major document updates are listed here. Minor updates for corrections or editing are not
documented here.
Changes from 1.0.15.5 User Manual
Added option to disable PnP subscribe feature [3CX Auto Provision]
Added option "DNS SRV use Registered IP" to control destination IP address for outbound request
under SRV mode [DNS SRV use Registered IP]
Split Layer 3 QoS into SIP and RTP [Layer 3 QoS]
Deactivated SIP INFO DTMF in SIP accept header. Added option "DTMF-RELAY Tag Respect SIP
INFO" [DTMF-RELAY Tag Respect SIP INFO]
Added configurable option to enable/disable Broadsoft Connected Line ID [Disable Connected Line ID]
Added TLS/SSL certificate domain and chain validation [Authenticate Server Certificate Domain]
Updated LED light patterns to match HT70x’s [Advanced definitions of the HT50x LEDs patterns]
Changes from 1.0.14.1 User Manual
Bugs fixed with no new feature added.
Changes from 1.0.13.3 User Manual
Added feature [Hold Target Before Refer] in FXS port settings, which allows user to hold or not hold the
phone call before refer.
Added feature [Crypto Life Time] in FXS port settings, which allows user to enable or disable Crypto life
time when using SRTP.
Added feature [Play busy/reorder tone before Loop Current Disconnect] in FXS port settings, which
allows user to configure if it will play busy/reorder tone before loop current disconnect upon call fail.

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HT502 User Manual
Changes from 1.0.12.4 User Manual
Added option [SIP Timer D] to configure RFC 3261 timer D in Advanced Settings.
Changed option name from [Allow DHCP Option 66 to override server] to [Allow DHCP Option 66 or 160
to override server]. Now the option160 can be abled/disabled along with option 66 on DHCP server at
the same time.
Added feature [Download Device XML Configuration] in advanced settings allows to download device
XML configuration to local directory.
Addied feature [Upload firmware] in advanced settings allows user to upload firmware file from local
directory.
Addied feature [Upload configuration] in advanced settings allows user to upload configuration file from
local directory.
Changes from 1.0.12.1 User Manual
Added the options to enable/disable [Always send HTTP Basic Authentication Information]
Added the options to restrict the m field sent in SDP [Disable Multiple m line in SDP]
Changes from 1.0.11.3 User Manual
Added the options to enable/disable [Do Not Escape '#' as %23 in SIP URI]
Added network whist/black list function on WAN port [White list for WAN side] [Black list for WAN side]
Changes from 1.0.10.9 User Manual
Added the options to enable/disable [Use P-Preferred-Identity Header] and [Use Privacy Header]
Added the option to enable/disable [Add Auth Header On Initial REGISTER]
Changes from 1.0.9.1 User Manual
Added option to change phone LED pattern rule. [Phone LED Pattern]
Added list [Blacklist For Incoming Calls] to block certain incoming number.

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Changes from 1.0.7.6 User Manual
Added option to enable/disable SIP NOTIFY Authentication. [Disable SIP NOTIFY Authentication]
Added option [Use Configured IP ] in DNS mode. Added configurable parameter [Primary IP][Backup
IP1][Backup IP2]
Added option to set [Reregister before Expiration]
Changes from 1.0.6.8 User Manual
Added the option to enable/disable hook flash. [Enable Hook Flash]
Added two CPE SSL configuration [CPE SSL Certificate][CPE SSL Private Key]
Added a configuration parameter to set the [Connection Request Port]
Removed DHCP Domain from Web UI
Removed Enable Ring-transfer from Web UI
Added a configuration parameter to set the [Offhook Auto-Dial Delay]
Changed the SSL Web UI decryption to [SIP TLS Certificate][SIP TLS Private Key] and [SIP TLS Private
Key Password]
Added [CPE] version to Software Version on Web UI

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HT502 User Manual
GUI INTERFACE EXAMPLES
(http://www.grandstream.com/sites/default/files/Resources/ht502_gui.zip)
1. Screenshot of Advanced User Configuration Page
2. Screenshot of Basic Settings Configuration Page
3. Screenshot of FXS Port 1 Configuration Login Page
4. Screenshot of FXS Port 2 Configuration Page
5. Screenshot of Status Page
6. Screenshot of Login page
7. Screenshot of Reboot page
8. Screenshot of Rebooting page

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HT502 User Manual
Welcome
Thank you for purchasing Grandstream’s HT502, the affordable, feature rich Analog Telephone Adaptor.
Grandstream HandyTone502 is a new addition to the popular HandyTone ATA product family. It features
the rich audio quality, a broad range of voice codecs, and functionality of the HT502, including two (2)
FXS ports each with independent SIP accounts.
This manual will help you learn how to operate and manage your HandyTone502 Analog Telephone Adaptor
and make the best use of its many upgraded features including simple and quick installation, 3-way
conferencing, and direct IP-IP Calling. This HT502 is very easy to manage and configure, and is
specifically designed to be an easy to use and affordable VoIP solution for both the residential user and the
teleworker.

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HT502 User Manual
Connect your HT502
Equipment Packaging
The HT502 ATA package contains:
One HT502 Main Case
One Universal Power Adaptor
One Ethernet Cable
One HT502 Vertical Stand
Connecting the HT502
The HT502 is designed for easy configuration and easy installation. Configure the HT502 following the
directions in the Configuration section of this manual.
1. Connect a standard touch-tone analog telephone to the PHONE port.
2. Insert a standard RJ11 telephone cable into the Phone1 port and connect the other end of the
telephone cable to the analog telephone.
3. Insert the Ethernet cable into the WAN port of HT502 and connect the other end of the Ethernet
cable to an uplink port (a router or a modem, etc.)
4. Connect a PC to the LAN port of HT502 if it is being used as a router.
5. Insert the power adapter into the HT502 and connect it to a wall outlet.
The HT502 Analog Telephone Adaptor is an all-in-one VoIP integrated device designed to be a total solution
for networks providing VoIP services. The HT502 VoIP features and functions are available using a regular
analog telephone.

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HT502 User Manual
Figure 1: Connecting the HT502
The HT502 has two FXS port. Both FXS ports can have a separate SIP account. This is a key feature of
HT502 as it supports simultaneous calls on both FXS ports.
Table 1: Definitions of the HT502 connectors
Power Cable
Power adapter connection
WAN Port (RJ-45)
Connect to the internal LAN network or router.
LAN Port (RJ-45)
Connect the LAN port with an Ethernet cable to your PC.
RESET
Factory Reset button. Press for 7 seconds to reset factory default settings.
PHONE1 (RJ-11)
FXS port to be connected to analog phones / fax machines.
PHONE2 (RJ-11)
FXS port to be connected to analog phones / fax machines.
There are five (5) LED buttons that help you manage the status of your HandyTone.
HT-502
Front View
Display LEDs
(green)
HT-502
Back View
RJ-45 Ports
Reset
RJ-11 FXS Ports
Power
Supply(12V)

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HT502 User Manual
Table 2: Definitions of the HT502 LEDs
LEDs
Indication
POWER LED
Indicates Power. Remains ON when power is connected
WAN LED
Indicates LAN (or WAN) port activity
LAN LED
Indicates PC (or LAN) port activity
PHONE1 / PHONE2
LED
Indicate status of the respective FXS Ports-PHONE1 /
PHONE2 on the back panel
Unregistered – OFF
Registered and Available – ON (Solid Green)
Off-Hook / Busy – Blinking every second
Slow blinking FXS LEDs indicates voicemail
NOTE: All LEDs display green when ON
Table 3: Advanced definitions of the HT50x LEDs patterns
LED-01
Device has normal power
Power
ON
LED-02
Power Error: Power is removed from the device or
power supply with improper voltage is plugged in
Power
OFF
LED-03
Line X is registered normally to the sip providers
network and is ready to make a call
Phone
ON
LED-04
Voice mail waiting for Line X
Phone
1sec ON / 3sec OFF
LED-05
Device has normal WAN connection and has obtained
IP address
Internet
ON
LED-06
Internet link error: Device is powered up and ready to
connect to the Internet but the WAN/INTERNET port
is down
Internet
OFF

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HT502 User Manual
LED-07
Internet DHCP Error: Device is properly connected
but it is unable to retrieve an IP address from the
device it is connected to
Internet
250ms ON/ 250ms
OFF
LED-08
Line Registration failed: Device is properly setup,
can connect to provider's network, but cannot register
to provider's SIP proxy (no 200 OK)
Phone
2x1000ms ON/OFF
+
3sec OFF
LED-09
Device is connected (has physical data link) but there
are incorrect network settings typically associated
with PPPoE connection failure
Internet
250ms ON/ 250ms
OFF
LED-10
Hazardous potential test failed: Hazardous AC or DC
voltage is present on the tip and ring or both signals
of phone line X
Phone
1x250ms ON/OFF
+
3sec OFF
LED-11
Foreign electro Motive Force (EMF) Test fail. Foreign
voltage is present on the tip, ring or both signals of
phone line. Device has detected additional external
Phone voltage on the FXS phone line.
Phone
2x250ms ON/OFF
+
3sec OFF
LED-12
Resistive fault test failed. Either tip or ring is shorted
to ground or they are shorted to each other.
Phone
3x250ms ON/OFF
+
3sec OFF
LED-13
Receiver off hook test fail. One or more phones are off
hook on phone line during test.
Phone
4x250ms ON/OFF
+
3sec OFF
LED-14
REN test failed – high REN detected. Too many
parallel phones connected to phone line X
Phone
5x250ms ON/OFF
+
3sec OFF
LED-15
Line is active
Phone
500ms ON/OFF

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HT502 User Manual
LED-16
Line inactive
Phone
ON
LED-17
During Provisioning Stage*
Internet /
Phone
500ms ON/OFF
LED-18
During Firmware Recovery Stage*
Internet /
Phone
250ms ON/OFF
LED-19
Line X is registered normally to the sip providers
network and is ready to make a call
Phone
2x1000 ms ON/OFF
+
3sec OFF
Figure 2: HT502 Connection diagram
Internet
ADSL/Cable
WAN
LAN
FXS
Fax
Cordless
Analog Phone
FXS
Fax
Cordless
Analog Phone

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HT502 User Manual
Product Overview
The HT502 is a full feature voice and fax-over IP device that offers a high-level of integration including dual
10M/100Mbps network ports with integrated router, NAT, DHCP server, dual port FXS telephone gateway,
market-leading sound quality, rich functionalities, and a compact and lightweight design. The VoIP network
signaling protocol supported is SIP. The HT502 fully compatible with SIP industry standard and can
interoperate with many other SIP compliant devices and software on the market. Moreover, it supports
comprehensive voice codecs including G.711 (a/µ-law), G.723.1, G.726 (16/24/32/40 bit rates), AAL2 (all
G.726), G.729A/B/E and iLBC.
Software Features Overview
2 FXS ports
Two RJ-45 ports (switched or routed)
2 SIP accounts & profiles
Supports Voice Codecs:
oG711(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
Table 4: HT502 Technical specifications
Telephone Interfaces
2 FXS ports, 2 SIP accounts
Network Interface
1 RJ45 for LAN, 10/100 Base-TX, Full Duplex
1 RJ45 for WAN,10/100Base-TX, Full Duplex

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HT502 User Manual
LED Indicators
Power, WAN, LAN, PHONE1 and PHONE2
Reset Button
Factory Reset button
Voice over Packet
Capabilities
Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC
(packet loss concealment), Dynamic Jitter Buffer, Modem detection & auto-
switch to G.711, Packetized Voice Protocol Unit (supports RTP and AAL2
protocol), G.168 compliant Echo Cancellation, LEC (line echo cancellation) with
NLP, Asymmetric RTP stream
Voice Compression
G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder,
G.723.1A, G.726(ADPCM), 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
Telnet Server
Yes
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
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
Control
TLS/SIPS , SIP over TCP/TLS
Device Management
Web interface or via secure encrypted AES or non-encrypted central
configuration file for mass deployment, Auto/manual provisioning system or via

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HT502 User Manual
built-in IVR.
NAT-friendly remote software upgrade (via TFTP/HTTP/HTTPS) for deployed
devices including behind firewall/NAT. Syslog support
Dial Plan
Yes
UPnP
Yes
Universal Switching
Power Adaptor
Input: 100–240 VAC/50-60 Hz 0.3A Max
Output: 12VDC, 0.5A, UL certified
Environmental
Operational: 32o–104oF or 0o–40oC
Storage: 10o–130o F / Humidity: 10–90% Non-condensing
Dimensions
(H x W x D)
115mm (L) x 75mm (W) x 27mm (H)
Short Haul Loop
3RENs, Up to 150feet on 24 AWG wire
Call Handling
Features
Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call transfer,
hold, forward, mute, 3-way conferencing, message waiting, Do-Not-Disturb
(DND), call-return service
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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HT502 User Manual
Hardware Specification
The table below lists the hardware specification of HT502.
Table 5: HT502 Hardware specification
LAN Interface
2 x RJ45 10/100Mbps (integrated router)
LED
5 LEDs (GREEN)
Universal
Switching
Power Adaptor
Input: 100-240V AC, 50/60Hz, 0.5A Max
Output: 12V DC, 0.5A
UL certified
Dimension
115mm (L) x 75mm (W) x 27mm (H)
Weight
94 g (0.21lbs)
Temperature
32~104°F / 0~40°C
Humidity
10% - 90% (non-condensing)
Compliance