Grandstream Networks DUAL FXS PORT HT502 User manual

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

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FIRMWARE VERSION 1.0.14.1 HT502 USER MANUAL
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HT502 USER MANUAL
INDEX
GNU GPL INFORMATION ................................................................................... 4
CHANGE LOG ........................................................................................................ 5
CHANGES FROM 1.0.13.3 USER MANUAL ..................................................................................................... 5
CHANGES FROM 1.0.12.4 USER MANUAL ..................................................................................................... 5
CHANGES FROM 1.0.12.1 USER MANUAL ..................................................................................................... 5
CHANGES FROM 1.0.11.3 USER MANUAL ..................................................................................................... 5
CHANGES FROM 1.0.10.9 USER MANUAL ..................................................................................................... 6
CHANGES FROM 1.0.9.1 USER MANUAL ....................................................................................................... 6
CHANGES FROM 1.0.7.6 USER MANUAL ....................................................................................................... 6
CHANGES FROM 1.0.6.8 USER MANUAL ....................................................................................................... 6
WELCOME .............................................................................................................. 7
SAFETY COMPLIANCES ................................................................................................................................... 7
WARRANTY......................................................................................................................................................... 7
CONNECT YOUR HT502 ...................................................................................... 8
EQUIPMENT PACKAGING ................................................................................................................................ 8
CONNECTING THE HT502 ................................................................................................................................ 8
PRODUCT OVERVIEW ...................................................................................... 11
SOFTWARE FEATURES OVERVIEW .............................................................................................................. 11
HARDWARE SPECIFICATION ......................................................................................................................... 12
BASIC OPERATIONS .......................................................................................... 15
UNDERSTANDING HT502 VOICE PROMPT ................................................................................................. 15
PLACING A PHONE CALL ............................................................................................................................... 16
PHONE OR EXTENSION NUMBERS ......................................................................................................... 16
DIRECT IP CALLS ...................................................................................................................................... 17
CALL HOLD ....................................................................................................................................................... 18
CALL WAITING ................................................................................................................................................. 18
CALL TRANSFER .............................................................................................................................................. 18
3-WAY CONFERENCING.................................................................................................................................. 19
FAX SUPPORT ................................................................................................................................................... 19
CALL FEATURES ................................................................................................. 21
CONFIGURATION GUIDE ................................................................................. 23
CONFIGURING THE HT502 THROUGH VOICE PROMPTS ........................................................................ 23

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CONFIGURING THE HT502 VIA WEB BROWSER ....................................................................................... 24
ACCESS THE WEB CONFIGURATION MENU ......................................................................................... 24
IMPORTANT SETTINGS ................................................................................................................................... 25
NAT SETTINGS ........................................................................................................................................... 25
DTMF METHODS ....................................................................................................................................... 25
PREFERRED VOCODER (CODEC) .......................................................................................................... 26
ADVANCED USER CONFIGURATION ........................................................................................................... 30
SAVING THE CONFIGURATION CHANGES ................................................................................................. 43
REBOOTING THE HT502 FROM REMOTE .................................................................................................... 43
CONFIGURATION THROUGH A CENTRAL SERVER .................................................................................. 43
SOFTWARE UPGRADE ...................................................................................... 45
FIRMWARE UPGRADE THROUGH TFTP/HTTP/HTTPS .............................................................................. 45
INSTRUCTIONS LOCAL FIRMWARE UPGRADE:........................................................................................ 46
CONFIGURATION FILE DOWNLOAD ........................................................................................................... 46
FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX ........................................................... 47
MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD ..................................................... 47
RESTORE FACTORY DEFAULT SETTING .................................................... 49
FACTORY RESET .............................................................................................................................................. 49
RESET BUTTON ................................................................................................................................................ 49
IVR COMMAND ................................................................................................................................................ 49

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TABLE OF FIGURES
HT502 User Manual
FIGURE 1: CONNECTING THE HT502 ..................................................................................................................... 9
FIGURE 2: HT502 CONNECTION DIAGRAM ........................................................................................................ 10
FIGURE 3: UPLINK/DOWNLINK BANDWIDTH LIMITATION ........................................................................... 29
TABLE OF TABLES
HT502 User Manual
TABLE 1: DEFINITIONS OF THE HT502 CONNECTORS ..................................................................................... 9
TABLE 2: DEFINITIONS OF THE HT502 LEDS ...................................................................................................... 9
TABLE 3: HT502 TECHNICAL SPECIFICATIONS ................................................................................................ 11
TABLE 4: HT502 HARDWARE SPECIFICATION .................................................................................................. 13
TABLE 5: HT502 IVR MENU DEFINITIONS ......................................................................................................... 15
TABLE 6: HT502 CALL FEATURES ....................................................................................................................... 21
TABLE 7: BASIC SETTINGS ................................................................................................................................... 26
TABLE 8: STATUS PAGE ......................................................................................................................................... 29
TABLE 9: ADVANCED SETTINGS ......................................................................................................................... 30
TABLE 10: ACCOUNT SETTINGS .......................................................................................................................... 35
CONFIGURATION GUI INTERFACE EXAMPLES
HT502 User Manual
(http://www.grandstream.com/products/ht_series/ht502/documents/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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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/support/faq/gnu_gpl .

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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 1.0.13.3 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.
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 SDPDisable 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]

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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.
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 decription 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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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.
SAFETY COMPLIANCES
The HT502 phone 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 phone caused by unsupported power adaptors.
WARRANTY
If you purchased your HT502 from a reseller, please contact the company where you purchased your device 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 before you return the product.
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. Please do
not use a different power adaptor with the HT502 as it may cause damage to the products and void the manufacturer
warranty.
This document contains links to HT502 GUI Interfaces. Please download these examples from
http://www.grandstream.com/products/ht_series/ht502/documents/ht502_gui.zip for your reference.
This document is subject to change without notice. The latest electronic version of this user manual is available for
download at: http://www.grandstream.com/products/ht_series/ht502/documents/ht502_usermanual_english.pdf
Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for any
purpose is not permitted without the express written permission of Grandstream Networks, Inc.

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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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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.
TABLE 2: DEFINITIONS OF THE HT502 LEDS
LEDs
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
Busy – ON (Solid Green)
Available – OFF
HT-502
Back View
RJ-45 Ports
10/100 Mbps
Reset RJ-11 FXS Ports
(Phone)
Power Supply
(12V)
HT-502
Front View
Display LEDs
(green)

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Internet ADSL/Cable
Modem Ethernet
WAN
LAN
FXS
Fax
Cordless Phone
Analog Phone
FXS
Fax
Cordless Phone
Analog Phone
Slow blinking FXS LEDs indicates voicemail for that port.
NOTE: All LEDs display green when ON. Slow blinking of WAN and LAN LED together indicate the product in
firmware upgrading or provision state.
FIGURE 2: HT502 CONNECTION DIAGRAM

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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:
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
TABLE 3: 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
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

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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 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
HARDWARE SPECIFICATION

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The table below lists the hardware specification of HT502.
TABLE 4: 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

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BASIC OPERATIONS
UNDERSTANDING HT502 VOICE PROMPT
HT502 has a built-in voice prompt menu for simple device configuration. The IVR menu and the LED button work
with any of the FXS port. Pick up the handset and dial “***” to use the IVR menu.
TABLE 5: HT502 IVR MENU DEFINITIONS
Menu Voice Prompt Options
Main Menu “Enter a Menu Option” Press “*” for the next menu option
Press “#” to return to the main menu
Enter 01-05, 07,10, 12-17,47 or 99 menu options
01 “DHCP Mode”,
“Static IP Mode”
Press “9” to toggle the selection
If using “Static IP Mode”, configure the IP address information using menus
02 to 05.
If using “Dynamic IP Mode”, all IP address information comes from the
DHCP server automatically after reboot.
02 “IP Address “ + IP address The current WAN IP address is announced
If using “Static IP Mode”, enter 12 digit new IP address. You need to reset
the HT to take affect the new IP address.
03 “Subnet “ + IP address Same as menu 02
04 “Gateway “ + IP address Same as menu 02
05 “DNS Server “ + IP address Same as menu 02
07 Preferred Vocoder Press “9” to move 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 Press “9” to toggle between enable / 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. Press “9” to toggle

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between
TFTP
/
HTTP
/ HTTPS
16 Firmware Version Firmware version information.
17 Firmware Upgrade Firmware upgrade mode. Press “9” to toggle among the following three
options:
- always check
- check when pre/suffix changes
- 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”.)
70 Phone calls between FXS 1
and FXS 2 port
User can make internal calls between two FXS ports on the same HT502
even without being registered to SIP server. By dialing *** and 70 user can
reach the other FXS port
86 Voice Mail Number of Voice Mails
99 “RESET” Press “9” to reboot the device
Enter MAC address to restore factory default setting
(See Restore Factory Default Setting section)
“Invalid Entry” Automatically returns to main menu
“Device not registered” This prompt will be played immediately after off hook If the device is not
register and the option “Outgoing Call without Registration” is in NO
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).

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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 HT502 and other VoIP Device, have public IP addresses, or
2. Both HT502 and other VoIP Device are on the same LAN using private IP addresses, or
3. Both HT502 and other VoIP Device can be connected through a router using public or private IP addresses
(with necessary port forwarding or DMZ).
HT502 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 after the dial tone and voice prompt “Direct IP Calling”
Using Star Code
1. Pick up the analog phone then dial “*47”
2. Enter the target IP address.
Note: NO dial tone will be played between step 1 and 2.
Destination ports can be specified using “*” (encoding for “:”) followed by the port number.
Examples of Direct IP Calls:

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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 cannot 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.
Attended Transfer
Assume that Caller A and B are in conversation. Caller A wants to Attend Transfer B to C: