Grandstream Networks GXP1160 User manual

GXP1160/GXP1165 USER MANUAL
Grandstream Networks, Inc.
GXP1160/GXP1165
Small-Medium Business IP Phone

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 2 of 59
GXP1160/GXP1165 User Manual
Index
GNU GPL INFORMATION...........................................................................2 
CHANGE LOG.............................................................................................2 
FIRMWARE VERSION 1.0.5.2..............................................................................................................2 
WELCOME ..................................................................................................2 
PRODUCT OVERVIEW...............................................................................2 
FEATURE HIGHTLIGHTS.....................................................................................................................2 
GXP1160/GXP1165 TECHNICAL SPECIFICATIONS...........................................................................2 
INSTALLATION ...........................................................................................2 
EQUIPMENT PACKAGING ...................................................................................................................2 
CONNECTING YOUR PHONE..............................................................................................................2 
SAFETY COMPLIANCES......................................................................................................................2 
WARRANTY...........................................................................................................................................2 
USING THE GXP1160/GXP1165.................................................................2 
GETTING FAMILAR WITH THE LCD....................................................................................................2 
GETTING FAMILAR WITH THE KEYPAD.............................................................................................2 
MAKING PHONE CALLS.......................................................................................................................2 
HANDSET, SPEAKER AND HEADSET MODE .............................................................................2 
2 CALLS WITH 1 SIP ACCOUNT...................................................................................................2 
COMPLETING CALLS ...................................................................................................................2 
MAKING CALLS USING IP ADDRESSES.....................................................................................2 
ANSWERING PHONE CALLS ..............................................................................................................2 
RECEIVING CALLS........................................................................................................................2 
DO NOT DISTURB.........................................................................................................................2 
DURING A PHONE CALL......................................................................................................................2 
CALL WAITING/CALL HOLD .........................................................................................................2 
MUTE..............................................................................................................................................2 
CALL TRANSFER ..........................................................................................................................2 
3-WAY CONFERENCING ..............................................................................................................2 
VOICE MESSAGES (MESSAGE WAITING INDICATOR).............................................................2 
CALL FEATURES..................................................................................................................................2 

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 3 of 59
CUSTOMIZED LCD SCREEN & XML...................................................................................................2 
CONFIGURATION GUIDE...........................................................................2 
CONFIGURATION VIA KEYPAD...........................................................................................................2 
CONFIGURATION VIA WEB BROWSER .............................................................................................2 
DEFINITIONS ........................................................................................................................................2 
STATUS PAGE DEFINITIONS .......................................................................................................2 
ACCOUNT PAGE DEFINITIONS ...................................................................................................2 
SETTINGS/BASIC SETTINGS PAGE............................................................................................2 
SETTINGS/ADVANCED SETTINGS PAGE...................................................................................2 
NAT SETTINGS.....................................................................................................................................2 
PUBLIC MODE......................................................................................................................................2 
EDITING CONTACTS AND CLICK-TO-DIAL ........................................................................................2 
UPGRADING AND PROVISIONING...........................................................2 
UPGRADE VIA KEYPAD MENU ...........................................................................................................2 
UPGRAGE VIA WEB GUI......................................................................................................................2 
NO LOCAL TFTP/HTTP SERVERS ......................................................................................................2 
CONFIGURATION FILE DOWNLOAD..................................................................................................2 
RESTORE FACTORY DEFAULT SETTINGS..............................................2 
EXPERIENCING THE GXP1160/GXP1165.................................................2 
Table of Tables
GXP1160/GXP1165 User Manual
Table 1: GXP1160/GXP1165 TECHNICAL SPECIFICATIONS.....................................................................2

Table 2: GXP1160/GXP1165 EQUIPMENT PACKAGING............................................................................2 
Table 3: GXP1160/GXP1165 CONNECTORS..............................................................................................2 
Table 4: GXP1160/GXP1165 DISPLAY DEFINITIONS.................................................................................2 
Table 5: GXP1160/GXP1165 LCD ICONS....................................................................................................2 
Table 6: GXP1160/GXP1165 KEYPAD DEFINITIONS .................................................................................2 
Table 7: CALL FEATURES............................................................................................................................2 
Table 8: GXP1160/GXP1165 CONFIGURATION MENU..............................................................................2 

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 4 of 59
Table of Figures
GXP1160/GXP1165 User Manual
Figure 1: GXP1160/GXP1165 Ports..............................................................................................................2

Figure 2: GXP1160/GXP1165 Keypad MENU Flow......................................................................................2 
Figure 3: GXP1160/GXP1165 Web GUI - Contacts......................................................................................2 
Figure 4: GXP1160/GXP1165 Click-to-Dial...................................................................................................2 
GUI Interface Examples
GXP1160/GXP1165 User Manual
http://www.grandstream.com/products/gxp_series/general/documents/gxp21xx_gui.zip
1. Screenshot of Configuration Login Page
2. Screenshot of Status Page
3. Screenshot of Basic Setting Configuration Page
4. Screenshot ofAdvanced User Configuration Page
5. Screenshot of SIPAccount Configuration Page
6. Screenshot of Saved Configuration Changes Page
7. Screenshot of Reboot Page

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 5 of 59
GNUGPLINFORMATION
GXP1160/GXP1165 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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FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 6 of 59
CHANGELOG
This section documents significant changes from previous versions of GXP1160/GXP1165 user manuals.
Only major new features or major document updates are listed here. Minor updates for corrections or
editing are not documented here.
FIRMWAREVERSION1.0.5.2
This is the initial version.

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 7 of 59
WELCOME
Thank you for purchasing Grandstream GXP1160/GXP1165 Small-Medium Business IP Phone.
GXP1160/GXP1165 is a next generation small-to-medium business IP phone that features single SIP
account, up to 2 call appearances, a 128 x 40 graphical LCD, 3 XML programmable context-sensitive soft
keys, dual network ports with integrated PoE (GXP1165 only), 3-way conference, and Electronic Hook
Switch (EHS) with Plantronics headset. The GXP1160/1165 delivers superior audio quality, rich and
leading edge telephony features, personalized information and customizable application service,
automated provisioning for easy deployment, advanced security protection for privacy, and broad
interoperability with most 3rd party SIP devices and leading SIP/NGN/IMS platforms. It is a perfect choice
for small-to-medium businesses looking for a high quality, feature rich IP phone with highly affordable cost.
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:
Please do not use a different power adaptor with the GXP1160/GXP1165 as it may cause damage to the
products and void the manufacturer warranty.
This document is subject to change without notice. The latest electronic version of this user manual is
available for download here:
http://www.grandstream.com/support
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.

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 8 of 59
PRODUCTOVERVIEW
FEATUREHIGHTLIGHTS
128 x 40 pixel graphical LCD display;
Single SIP account, up to 2 call appearances, 3 XML programmable context-sensitive soft keys, 3-way
conference;
Phonebook with up to 500 contacts and call history with up to 200 records;
Automated personal information service (e.g., local weather), personalized music sing tone/ring back
tone;
Dual switched auto-sensing 10/100Mbps network ports, integrated PoE (GXP1165 only);
Automated provisioning using TR-069 or AES encrypted XML configuration file, SRTP and TLS for
advanced security protection, 802,1x for media access control.
GXP1160/GXP1165TECHNICALSPECIFICATIONS
Table 1: GXP1160/GXP1165 TECHNICAL SPECIFICATIONS
Protocols and
Standards
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS
(A record, SRV, NAPTR), DHCP, PPPoE, TFTP, NTP, STUN, SIMPLE, TR-069,
802.1x, IPv6
Network Interfaces Dual switched 10/100Mbps ports, integrated PoE (GXP1165 only)
Graphic Display 128 x 40 graphical LCD display
Feature Keys
1 SIP account, 3 XML programmable context sensitive soft keys, 5
Navigation/Menu/Volume keys, 9 dedicated function keys for PHONEBOOK,
MESSAGE (with LED indicator), HOLD, TRANSFER, CONFERENCE, FLASH,
SPEAKERPHONE, VOLUME, SEND/REDIAL
Voice Codec Support for G.723.1, G.729A/B, G.711u/a, G.726-32, G.722 (wide-band), iLBC,
in-band and out-of-band DTMF (in audio, RFC2833, SIP INFO)
Telephony Features
Hold, transfer, forward, 3-way conference, downloadable phone book (XML, LDAP,
up to 500 items), call waiting, call log (up to 200 records), off-hook auto dial, auto
answer, click-to-dial, flexible dial plan, hot-desking, personalized music ringtones,
server redundancy and fail-over
Headset Jack RJ9, supporting Electronic Hook Switch (EHS) with Plantronics headsets
Base Stand Yes, 1 angle position available

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Wall Mountable Yes
QoS Layer 2 (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS
Security User and administrator level passwords, MD5 and MD5-sess based
authentication, AES encrypted configuration file, SRTP, TLS, 802.1x media access
control
Multi-language English, German, Italian, French, Spanish, Portuguese, Russian, Croatian,
Simplified and Traditional Chinese, Korean, Japanese and etc
Upgrade and
Provisioning Firmware upgrade via TFTP/HTTP/HTTPS, mass provisioning using TR-069 or AES encrypted XML configuration file
Power and Green
Energy Efficiency
Universal power adapter included
Input: 100-240VAC 50-60Hz
Output: +5VDC, 800mA
Integrated Power-over-Ethernet (802.3af, GXP1165 only)
Max power consumption 2.5W (universal power adapter) or 3W (PoE)
Physical Unit dimension: 154mm (W) x 200mm (L) x 79mm (D) (handset onhook) Unit weight: 0.6kg
Package weight: 1.03kg
Temperature and
Humidity Operating: 32-104
o
F / 0-40
o
C, 10-90% (non-condensing)
Storage: 14-140
o
F / -10-60
o
C
Package Content GXP1160/GXP1165 phone, handset with cord, base stand, universal power supply,
network cable, quick start guide
Compliance FCC Part 15 (CFR 47) Class B; EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, EN60950-1;AS/NZS CISPR 22 Class B, AS/NZS CISPR 24, RoHS;
UL 60950 (power adapter)

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 10 of 59
INSTALLATION
EQUIPMENTPACKAGING
Table 2: GXP1160/GXP1165 EQUIPMENT PACKAGING
Main Case Yes (1)
Handset Yes (1)
Phone Cord Yes (1)
Power Adaptor Yes (1)
Ethernet Cable Yes (1)
Phone Stand Yes (1)
Quick Start Guide Yes (1)
CONNECTINGYOURPHONE
Figure 1: GXP1160/GXP1165 Ports

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 11 of 59
Table 3: GXP1160/GXP1165 CONNECTORS
Handset Port RJ9 handset connector port
Headset Port RJ9 headset connector port, supporting EHS (Electronic Hook-Switch) with
Plantronics headsets
LAN Port 10/100Mbps RJ-45 port connecting to Ethernet, integrated PoE (GXP1165 only)
PC Port 10/100Mbps RJ-45 port for PC connection
Power Jack 5V DC Power connector port
To set up the GXP1160/GXP1165, follow the steps below:
1. Attach the phone stand to the back of the phone where there are slots;
2. Connect the handset and main phone case with the phone cord;
3. Connect the LAN port of the phone to the RJ-45 socket of a hub/switch or a router (LAN side of the
router) using the Ethernet cable;
4. Connect the 5V DC output plug to the power jack on the phone; plug the power adapter into an
electrical outlet. If PoE switch is used on GXP1165 in step 3, this step could be skipped;
5. The LCD will display provisioning or firmware upgrade information. Before continuing, please wait for
the date/time display to show up;
6. Using the keypad configuration menu or phone's embedded web server (Web GUI) by entering the IP
address in web browser, you can further configure the phone.
SAFETYCOMPLIA NCES 
The GXP1160/GXP1165 phone complies with FCC/CE and various safety standards. The
GXP1160/GXP1165 power adapter is compliant with the UL standard. Use the universal power adapter
provided with the GXP1160/GXP1165 package only. The manufacturer’s warranty does not cover
damages to the phone caused by unsupported power adapters.
WARRANTY
If the GXP1160/GXP1165 phone was purchased from a reseller, please contact the company where the
phone was purchased for replacement, repair or refund. If the phone was purchased directly from
Grandstream, contact the Grandstream Sales and Service Representative for a RMA (Return Materials

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 12 of 59
Authorization) number before the product is returned. Grandstream reserves the right to remedy warranty
policy without prior notification.
Warning: Use the power adapter provided with the phone. Do not use a different power adapter as this
may damage the phone. This type of damage is not covered under warranty.

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 13 of 59
USINGTHEGXP1160/GXP1165
GETTINGFAMILARWITHTHELCD
GXP1160/GXP1165 has a dynamic and customizable screen. The screen displays differently depending
on whether the phone is idle or in use (active). The following table describes the items displayed on the
GXP1160/GXP1165 idle screen.
Table 4: GXP1160/GXP1165 DISPLAY DEFINITIONS
DATE AND TIME Displays the current date and time. It can be synchronized with Internet time
servers.
LOGO NAME Displays company logo name. This logo name can be customized via xml screen
customization. The maximum size for logo name is 26 characters in English
(approximately).
NETWORK STATUS Shows the status of network in the middle of the screen. It will indicate whether
the network is down or starting.
STATUS BAR Shows the status of the phone for registration status, call features and etc, using
icons as shown in the next table.
SOFTKEYS The softkeys are context sensitive and will change depending on the status of
the phone. Typical functions assigned to softkeys are:
NextScr: Toggles among idle screen, weather information, IP Address
and extension number;
Headset: Onhook/offhook using headset; or toggle to headset mode;
FwdAll: Unconditionally forwards the calls to another number;
Missed: Shows unanswered calls to this phone;
Redial: Redials the last dialed out number.

Table 5: GXP1160/GXP1165 LCD ICONS
Registration Status: Registered.
Registration Status: Not Registered.
Handset Status.

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OFF-handsetonhook
ON - handset off hook
Speaker Status.
OFF-speakeroff
ON - speaker on
Headset Status.
OFF - headset off
ON - headset on
DND Status.
OFF - Do Not Disturb disabled
ON - Do Not Disturb enabled
Call Forward Status.
OFF - Call Forward feature disabled
ON - Call Forward feature enabled
MUTE Status.
OFF - The active call is not muted
ON - The active call is muted
SRTP Status.
OFF - SRTP is not used
ON - SRTP is used

GETTINGFAMILARWITHTHEKEYPAD
The following table describes the buttons used on the GXP1160/GXP1165 keypad.
Table 6: GXP1160/GXP1165 KEYPAD DEFINITIONS
Place active call on hold, or resume the call on hold.
Transfer an active call to another number.
Establish 3-way conference with other 2 parties.

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 15 of 59
Bring up a new line; or answer the second incoming call.
Speaker.
Send/Redial.
Send. Enter the digits and then press Send to dial out the number;
Redial. Redial when there is a previously dialed call.
Voicemail. Press to retrieve voice mails.
Phonebook. Brings phonebook on screen.
Navigation Keys/Menu.
Press the 4 navigation keys to move up/down/left/right;
Press the round button in the center to enter Keypad Configuration
MENU when phone is in idle;
The round button "MENU" can also be used as ENTER key when in
Keypad Configuration.
Volume. Press "-" or "+" to adjust the volume.
0 - 9, *, # Standard phone keypad.
MAKINGPHONECALLS
HANDSET,SPEAKERANDHEADSETMODE
The GXP1160/GXP1165 allows users to switch among handset, speaker or headset when making calls.
Press the Hook Switch to switch to handset; press the Headset softkey to switch to headset; or press the
Speaker button to switch to speaker.
2CALLSWITH1SIPACCOUNT
GXP1160/GXP1165 can support up to two lines "virtually" mapped to one SIP account. By picking up the
handset, the GXP1160/GXP1165 will be in off hook state and the dial tone will be heard. To make a call,

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 16 of 59
dial out the number with the current line.
During the call, users can press the FLASH key to hold the current call and make/answer another call. If
they are 2 calls established, users can switch the two lines by pressing the FLASH key.
COMPLETINGCALLS
There are several ways to complete a call on GXP1160/GXP1165.
On hook dialing. Enter the number when the phone is on hook and then send out.
When the phone is in idle, enter the number to be dialed out;
Take handset off hook; or
Press Speaker button; or
Press Headset softkey with headset plugged in;
The call will be dialed out.
Off hook and dial. Off hook the phone, enter the number and send out.
Take handset off hook; or
Press Speaker button; or
Press Headset softkey with headset plugged in;
You shall hear dial tone after off hook;
Enter the number;
Press SEND key or # to dial out.
Redial. Redial the last dialed number.
Take handset off hook; or
Press Speaker button; or
Press Headset softkey with headset plugged in; or
When the phone is in idle;
Press SEND key , or the REDIAL softkey.
Via Call History. Dial the number logged in phone's call history.
Press MENU button to bring up the main menu;
Enter Call History and select "Answered Calls", "Missed Calls", "Transferred Calls" or "Forwarded
Calls";
Select the entry you would like to call using the navigation "UP" and "DOWN" arrow keys;

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 17 of 59
Press SEND key to dial out.
Via Phonebook. Dial the number from the phonebook.
Press MENU button to bring up the main menu;
Select and enter Phonebook;
Select the phonebook entry you would like to call using the navigation "UP" and "DOWN" arrow
keys;
Press SEND key to dial out.
Via Page/Intercom.
Take handset off hook; or
Press Speaker button; or
Press Headset softkey with headset plugged in;
You shall hear dial tone after off hook;
Press MENU button to switch the call screen from "Line x: Caller DIAL" to "Line x: Caller Paging";
Enter the number;
Press SEND key or # to dial out.
Note:
After entering the number, the phone waits for the No Key Entry Timeout (Default timeout is 4 seconds,
configurable via Web GUI) before dialing out. Press SEND key or # key to override the No
Key Entry Timeout;
If digits have been entered after handset is off hook, the SEND key will works as SEND instead of
REDIAL;
By default, # can be used as SEND to dial the number out. Users could disable it by setting "Use # as
Dial Key" to "No" from Web GUI->Account page;
For Paging/Intercom, if the SIP Server/PBX supports the feature and has Paging/Intercom feature
code set up already, users might not necessarily need toggle to paging mode in the call screen on
GXP1160/GXP1165. Simply dial the feature code with extension as a normal call.
MAKINGCALLSUSINGIPADDRESSES
Direct IP Call allows two phones to talk to each other in an ad-hoc fashion without a SIP proxy. VoIP calls

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 18 of 59
can be made between two phones if:
Both phones have public IP addresses; or
Both phones are on the same LAN/VPN using private or public IP addresses; or
Both phones can be connected through a router using public or private IP addresses (with necessary
port forwarding or DMZ).
To make a direct IP call, please follow the steps below:
Press MENU button to bring up main menu;
Select "Direct IP Call" using the navigation arrow keys;
Press MENU to enter the Direct IP Call mode;
Input the 12-digit target IP address (Please see example below);
Press the "More" softkey to make sure the softkey selection "IPv4" or "IPv6" is correctly selected
depending on your network environment;
Press "OK" softkey to dial.
For example:
If the target IP address is 192.168.1.60 and the port is 5062 (i.e., 192.168.1.60:5062), input the following:
192*168*1*60#5062. The * key represents the dot (.), the # key represents colon (:). Wait for about 4
seconds and the phone will initiate the call.
Quick IP Call Mode:
The GXP1160/GXP1165 also supports Quick IP Call mode. This enables the phone to make direct IP calls
using only the last few digits (last octet) of the target phone's IP address. This is possible only if both
phones are under the same LAN/VPN. This simulates a PBX function using the CMSA/CD without a SIP
server. Controlled static IP usage is recommended.
To enable Quick IP Call Mode, go to GXP1160/GXP1165 Web GUI->Advanced Setting page, set "Use
Quick IP Call Mode" to "Yes". Click on "Update" on the bottom of the Web GUI page to take the change. To
make Quick IP Call, take the phone off hook first. Then dial #xxx where x is 0-9 and xxx<255. Press # or
SEND and a direct IP call to aaa.bbb.ccc.XXX will be completed. "aaa.bbb.ccc" is from the local IP address
regardless of subnet mask. The number #xx or #x are also valid. The leading 0 is not required (but it's OK).
For example:
192.168.0.2 calling 192.168.0.3 -- dial #3 followed by # or “SEND”;
192.168.0.2 calling 192.168.0.23 -- dial #23 followed by # “SEND”;

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192.168.0.2 calling 192.168.0.123 -- dial #123 followed by # “SEND”;
192.168.0.2: dial #3 and #03 and #003 results in the same call -- call 192.168.0.3.
Note:
The # will represent colon ":" in direct IP call rather than SEND key as in normal phone call;
If you have a SIP server configured, direct IP call still works. If you are using STUN, direct IP call will
also use STUN;
Configure the "Use Random Port" to "No" when completing direct IP calls.
ANSWERINGPHONECALLS
RECEIVINGCALLS
Single incoming call. Phone rings with selected ring tone. Answer call by taking handset off hook, or
using Speaker/Headset;
Multiple incoming calls. When another call comes in while having an active call, the phone will
produce a Call Waiting tone (stutter tone). Answer the incoming call by pressing the FLASHING key.
The current active call will be put on hold automatically.
DONOTDISTURB
Do Not Disturb can be enabled/disabled in Menu->Preference.
Press the Menu button and select "Preference" using navigation keys;
Press Menu button again to get into Preference options;
Select "Do Not Disturb" and press Menu button;
Use "UP" and "DOWN" arrow keys to select and press Menu button to enable or disable "Do Not
Disturb" feature.
When Do Not Disturb feature is turned on, the DND icon will appear on the right side of the LCD. The
incoming call will not be accepted or directly go into voicemail.
DURINGAPHONECALL
CALLWAITING/CALLHOLD

FIRMWARE VERSION 1.0.5.2 GXP1160/GXP1165 USER MANUAL Page 20 of 59
Hold. Place a call on hold by pressing the HOLD key ;
Resume. Resume call by pressing the HOLD key again;
Multiple calls. Automatically place active call on hold or switch between two calls by pressing the
FLASH key . Call waiting tone (stutter tone) will be audible on incoming call during the active
call.
MUTE
During an active call, press the MUTE softkey to mute/unmute the microphone. The LCD will show "LINEx:
TALKING" or "LINEx: MUTE" to indicate the mute status, with Mute icon displayed on the right side of the
screen.
CALLTRANSFER
GXP1160/GXP1165 supports Blind Transfer, Attended Transfer andAuto-Attended Transfer.
Blind Transfer.
During the first active call, press TRANSFER key and dial the number to transfer to;
Press SEND key or # to complete transfer of active call.
Attended Transfer.
During the first active call, press FLASH key . The first call will be put on hold;
Enter the number for the second call and establish the call;
Press TRANSFER key ;
Press FLASH key to transfer the call.