The information contained in this document is subject to change without notice and does not represent a commitment on the part of
Xtramus Technologies. The information in this document is believed to be accurate and reliable. However, Xtramus Technologies
assumes no responsibility or liability for any errors or inaccuracies that may appear in the document.
Trademarks
APMPT-4 is a trademark or registered trademark of Xtramus Technologies. All other trademarks and registered trademarks are the
property of their respective owners.
Warranty
Xtramus Technologies warrants for the hardware provided along with this document under proper usage and conditions in normal
environment; any improper operation or in irregular environment may possibly cause this product NOT function well. For detailed
terms, please contact your local dealer.
6.3. Test Report .................................................................................................................... 145
6
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Item
Description
Platform
NuStreams-2000(i), NuStreams-600(i) chassis
Operating System
Microsoft Windows Vista /7/8, Microsoft Windows XP
Supported Modules
Xtramus XM-RM series Rapid-Matrix modules
Built-in Tasks
Performance Task in Layer 1 (Layer1)
Performance Task in Layer 2 (Layer 2)
Performance Task in Layer 3 (Layer 3)
PoE (Power over Ethernet) Tasks
AC Tasks
Terminal Tasks
General Tasks
Customization Tasks
Multi-User
Support Client-Server architecture for different users
Report
Test report in text format or real-time display
Configuration
Graphic User Interface (GUI) windows
OS
Windows XP
Windows Vista /7/8
CPU
Pentium 1.3 GHz or higher
RAM
512MB RAM
1GB RAM
HDD
10GB available space
1. APMPT-4 Overview
1.1. General Description of APMPT-4
APMPT-4 is a utility-software for Microsoft Windows operating system. Specifically designed
for Xtramus NuStreams chassis, APMPT-4 can perform tests in mass-production scale with
pre-defined variable, and provide accurate, real-time DUT (Device under Test) status test
reports.
1.2. Specifications & System Requirements
Specifications
System Requirements
7
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
1.3. Function Description
Built-in tasks in APMPT-4 include Unicast, Flow Control, Broadcast, Filter, CRC Error, Ping, PoE, Power,
Console port tasks and other tasks.
1.3.1. Performance Task in Layer 1 (PT1)
DUT OSC Test
Test the speed rate of the DUT
By using this utility, operator is able to measure oscillator's speed of DUT that is either faster or slower
than standard speed in ppm scale, or use it as criteria to judge the result of test.
1.3.2. Performance Task in Layer 2 (PT2)
A. Unicast Test
Unicast transmission is to send information packets to a single destination. In layer 2 test, unique MAC
address is the key of single destination as illustration below.
Perform unicast test on DUT in layer2 with different speeds, modes and various configurations.
PT2-UC-10H (10Mbps Half Duplex),
PT2-UC-10F (10Mbps Full Duplex),
PT2-UC-100H (100Mbps Half Duplex),
PT2-UC-100F (10Mbps Full Duplex),
PT2-UC-1G (1Gbps Full Duplex),
PT2-UC-10G (10G Full Duplex),
PT2-UC-GROUPS (Perform Layer 2 MAC address Unicast performance test by two groups
settings with different media types such as 100Mbps and 1Gbps for DUT ports with different
maximum speeds)
8
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
B. Flow Control Test
Perform flow control test on DUT in layer 2 with different speeds, modes and various configurations. It
tests the performance when the DUT is connected to the media type with varied kinds of speeds and
directions.
PT2-FC-10H-100H (10Mbps Half ↔ 100Mbps Half),
PT2-FC-100H-10H (100Mbps Half ↔10Mbps Half),
PT2-FC-10F-100F (10Mbps Full ↔ 100Mbps Full),
PT2-FC-100F-10F (100Mbps Full ↔ 10Mbps Full),
PT2-FC-100F-1G (100Mbps Full ↔ 1Gbps Full),
PT2-FC-1G-100F (1Gbps Full ↔ 100Mbps Full),
PT2-FC-1G-10G (1Gbps Full ↔ 10G Full),
PT2-FC-10G-1G (10G Full ↔ 1Gbps Full),
PT2-FC-GROUPS (Perform Layer 2 Flow Control tests by two groups with different media types
such as 100Mbps and 1Gbps for DUT ports with different maximum speeds.)
C. Broadcast Test
Broadcasting refers to transmitting packets that will be received (conceptually) by every device on the
network.
Perform broadcast test on DUT in layer2 with different speeds, modes and various configurations.
These following tasks transmit broadcast frames (Destination Address: FF:FF:FF:FF:FF:FF).
PT2-BC-10H, (10Mbps, Half Duplex)
PT2-BC-10F, (10Mbps, Full Duplex)
PT2-BC-100H, (100Mbps, Half Duplex)
PT2-BC-100F, (100Mbps, Full Duplex)
PT2-BC-1G, (1Gbps, Full Duplex)
PT2-BC-10G, (10Gbps, Full Duplex)
PT2-BC-GROUPS (Perform Layer 2 Broadcast test by two groups with different media types such
as 100Mbps and 1Gbps for DUT ports with different maximum speeds.)
9
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
D. Filter Test
This filter test should filter all packets with the same source MAC address and destination MAC Address.
For the test packets transmitted are all with the same source MAC address and destination MAC
address and the DUT should filter this kind of packet.
Perform filter test on DUT in layer2 with different speeds, modes and various configurations. The
following tasks transmit frames with same DA (destination address) and SA (source address).
PT2-FT-10H, (10Mbps, Half Duplex)
PT2-FT-10F, (10Mbps, Full Duplex)
PT2-FT-100H, (100Mbps, Half Duplex)
PT2-FT-100F, (100Mbps, Full Duplex)
PT2-FT-1G, (1Gbps, Full Duplex)
PT2-FT-10G, (10Gbps, Full Duplex)
PT2-FT_GROUPS (Perform Layer 2 Filter Test by two groups with different media types such as
100Mbps and 1Gbps for DUT ports with different maximum speeds.)
E. CRC Error Test
CRC Checksum is registered at the end of Ethernet frame.
Perform CRC (Cyclic Redundancy Check) error test on DUT in layer2 with different speeds, modes and
various configurations for the last 4 bytes of CRC to be filtered. For normal DUT, frame with error CRC
should be filtered. The following tasks transmit frames with CRC errors.
PT2-CRC-10H, (10Mbps, Half Duplex)
PT2-CRC-10F, (10Mbps, Full Duplex)
PT2-CRC-100H, (100Mbps, Half Duplex)
PT2-CRC-100F, (100Mbps, Full Duplex)
PT2-CRC-1G, (1Gbps, Full Duplex)
PT2-CRC-10G, (10Gbps, Full Duplex)
PT2-CRC-GROUPS (Perform Layer 2 CRC check test by two groups with different media types
such as 100Mbps and 1Gbps for DUT ports with different maximum speeds.)
10
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
1.3.3. Performance Tasks in Layer 3 (PT3)
A. Network Tool: Ping
Ping is a network tool used to test whether a particular host is reachable across an IP network. It is also
used to self-test the network interface card of the computer, or as a speed test.
Perform Ping test on DUT in layer3 that is based on different IP addresses, subnet mask, ping IP address
and gateway.
PT3-Ping
B. Unicast Test
Unicast transmission is to send information packets to a single destination. In layer 3 test, unique IP
address is the key of single destination as illustration below.
Perform unicast test on DUT in layer 3 with different speeds, mode and various configurations.
PT3-UC-10H, (10Mbps, Half Duplex)
PT3-UC-10F, (10Mbps, Full Duplex)
PT3-UC-100H, (100Mbps, Half Duplex)
PT3-UC-100F, (100Mbps, Full Duplex)
PT3-UC-1G, (1Gbps, Full Duplex)
PT3-UC-10G, (10Gbps, Full Duplex)
PT3-UC-GROUPS (Layer 3 Unicast Full Performance Test. Perform Layer 3 IP Address Unicast
test by two groups with different media types such as 100Mbps and 1Gbps for DUT ports with
different maximum speeds.)
11
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
1.3.4. PoE (Power over Ethernet) Test
Overview of PoE
PoE: Power Over Ethernet
Based on IEEE 802.3af and ongoing 802.3at
Protocol for DTE power via copper-based media
DTE (Data Terminal Equipment)
PSE: Power Sourcing Equipment
Equipment provides the power to PD by network cable.
PD: Powered Device
Device consumes the power from PSE by network cable. NuStream-2000i, 600i with PoE module
acts as PD for the test.
A. PoE-Connect
Perform connect test on DUT (i.e. PSE) based on different configurations.
B. PoE-Disconnect
Perform disconnect test on DUT (i.e. PSE) based on different configurations.
C. PoE-Overload
Perform overload test on DUT (i.e. PSE) based on different configurations.
D. PoE-ShortCircuit
Perform short circuit test on DUT (i.e. PSE) based on different configurations.
E. PoE-Loading
Perform loading and transmitting packets test on DUT (i.e. PSE) based on different configurations.
F. PoE-Loading-GROUPS
Perform loading and transmitting packets test on DUT (i.e. PSE) based on different configurations and
criteria for two groups with different media types such as 100Mbps and 1Gbps
G. POE-Dynamic Loading
Perform multiple loading and transmitting packets test on DUT (i.e. PSE) in different configurations at the
same time.
12
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
1.3.5. AC Test
A. PWR-Setup
Perform power control on DUT such as power ON control and cycle reboot through test module XM-2WL1.
Under the control of XM-2WL1 module on chassis, the DUT that use the power from XM-2WL1 can have
ON / OFF and reboot control.
B. PWR-Check
Perform power monitor and statistics measurement from power plug into test module XM-2WL1. The outlet
of XM-2WL1 also supply power to DUT, thus operator gets the power statistics measurement to DUT.
1.3.6. Terminal Test
This test includes two parts: Console and Telnet test. Perform test by executing commands by manual
script or script file to RS232 interface or Telnet Server of DUT.
A. Console
Console refers to the console port, COM port or RS232 interface. This test will perform a series of standard
terminal command to check the response of COM port.
B. Telnet
Perform test by executing commands by manual script file to Telnet Server of DUT.
1.3.7. General Test
Tests listed in this category include: 1 to Many-UC, 1 to Many-MCV,CALL-EXT, Inserting Waiting Time,
Media Pre-setting ,Toggle MDI-II/X and Line Emulate .
A. 1 to Many-UC
1 to Many-UC is a Unicast Full Performance Test. Performing Layer 2 MAC address Unicast performance
tests from one source to multiple ports with different media types (such as 100Mbps and 1Gbps Full).
13
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
B. 1 to Many-MCV
Performing Layer 2 VLAN address multicast performance tests from one source port to multiple
destination ports with different media types (such as 100Mbps and 1Gbps Full).
C. CALL-EXT
This function allows you to execute your own programs/files as APMPT-4 Tasks.
D. Inserting Waiting Time
This function allows users to insert waiting time in-between tasks or to pause the whole testing process
after completing a task.
E. Media Pre-Setting
Test MDIX by Media Pre-setting mode or force MDI (straight-through connection) or MDIX (crossover
connection) mode of DUT.
F.Toggle MDI-II/X
Test the Auto MDIX function of different speeds/link modes of the DUT. Toggle MDI-II/X is a technology
that automatically detects the required cable connection type (straight-through or crossover) and
configures the connection appropriately.
G. Line Emulate
This function allows you to set the device 5160 or other line simulators connecting to the DUT port. Line
Emulate task must be performed ahead of the task which needs it.
1.3.8. Customization Test
A. CTM-BSTAR-001
This function allows two ports to co-transmit packets in which both side can have different Tx
parameters.
14
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
1. Double-click APMPT-4 installation program
and start the installation process.
2. InstallShield Wizard is starting to install
APMPT-4. If you would like to cancel
installation, click Cancel.
3. Click Next to continue installation.
4. Click I accept the terms in the license
agreement, and click Next to continue.
2. Software/Hardware Installation for APMPT-4
2.1. Install/Uninstall APMPT-4 on PC
Please follow the steps down below to install APMPT-4:
15
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
5. Input the User Name and Organization and
click Next to continue.
6. Click the Change… button to install the
program to another folder, or click Next button
to install the program into the default
destination folder, and then continue next step.
Click Back button to go back to the previous
step to modify.
7. Click Install to begin the installation.
8. InstallShield Wizard is installing APMPT-4.
16
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
9. Click Finish to exit the wizard.
10. WinPcap Installer appears. Click Next
button to get ready to install, or click Cancel
button to stop.
11. Review the license agreement before
installing. Click I Agree button to continue. It is
necessary to accept the agreement to install
WinPcap.
12. It is high recommended to check the
“Automatically start the Wincap driver at boot
time” as default. Then click Install.
17
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
13. WinPcap is installing.
14. WinPcap installation completes. Click
Finish button to close the wizard.
You can uninstall APMPT-4 by:
Click Start → Programs → NuStreams →
APMPT-4→ Uninstall APMPT-4
Go to the Control Panel, choose
APMPT-4 from installed program list, and
click “Uninstall”.
18
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
2.2. Hardware Installation
Before running APMPT-4 after installation, please be sure that you‟ve installed both the DUT and your PC
with Nustreams-2000i/600i properly as shown in the illustrations down below.
For operating APMPT-4 on NuStreams-2000i and NuStreams-600i Chassis, an external PC is required.
For NuStreams-2000i, connect network port of PC LAN card to DOWN (or UP) port of XM-2S19 with
network cable.
For NuStreams-600i, connect network port of PC LAN card to DOWN (or UP) port of XM-2S10 with
network cable.
Please note that the PC‟s TCP/IP setting should be configured so that the PC‟s NIC will obtain an IP
address from NuStreams-2000i/600i automatically.
19
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
You can start running APMPT-4 by:
Click Start Programs NuStreams
APMPT-4.
Double-click APMPT-4 icon located on your
PC‟s desktop.
3. APMPT-4 Overview
3.1. Starting APMPT-4
Before starting APMPT-4, the DUT, your PC, and NuStreams-2000i/600i shall be connected as shown in
“2.2. Hardware Installation”.
When you first start the APMPT-4, a Profile Section window as below will pop up. Select standard (default) option in general case. If you are a user of a certain customized company, select the
corresponding option.
If your PC is not connected with NuStreams-2000i/600i, you can still run APMPT-4 under Demo Mode.
Almost all APMPT-4‟s functions are available under Demo Mode. However, please note that Demo Mode
is for system demo purposes only, and does not serve any test purpose at all.
20
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
21
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Please follow the steps down below to start APMPT-4:
When starting APMPT-4, a “Connect to NuServer”
window will pop up and asked how you are going to
connect to NuServer.
Local Host: Choose this option when you‟re
running APMPT-4 from NuStreams-2000i IPC
module or a PC that‟s connected to
NuStreams-2000i/600i via an RJ45 cable.
Remote: Choose this option when you‟re running
APMPT-4 from other PC located on the network.
Choose the IP address which is assigned from
NuStreams-2000i/600i from the scroll-down menu。
Demo: Choose demo to enter APMPT-4‟s Demo
Mode.
Connect/Cancel: Click the Connect button to
connect to NuStreams-2000i/600i or click the
Cancel button to quit.
If NuServer is not running while starting APMPT-4, a
window will pop up and ask if you would like to run
NuServer. Please click Yes to continue or No to cancel.
A “NuServer-NIC Information” window will pop up. Please select the NIC (Network Interface Card) which is
connected to NuStreams -2000i/ 600i from the Network Interface Information table, and click OK. If you‟re
using NuStreams-2000i‟s IPC module, please choose “Realtek RTL8139 Family Fast Ethernet”. NuServer
will connect to the daughter boards, and APMPT-4 will start as well.
22
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Please follow the steps down below to start APMPT-4:
When the information listed in the Nuserver window is
abnormal, click Force Disconnect, and then click
ReConnect.
Force Disconnect: Disconnect with NuStreams -2000i/
600i forcefully.
ReConnect: Reconect with NuStreams -2000i/ 600i.
For security reasons, APMPT-4 requires
Account/Password to login. The default
Account/Password is:
Account: Admin
Password: xtramustech
Please note that the password is case-sensitive, and
shall be changed as soon as you login for the first time.
Please refer to “3.3.4. Security” for more information
about how to change APMPT-4‟s password.
Enable auto-logout after 5 min: Enable this
function so APMPT-4 shall automatically logout
after 5 minutes.
Login/Cancel: Click Login/Cancel button to login
or cancel.
23
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Please follow the steps down below to start APMPT-4:
You now have access to APMPT-4‟s main display window.
24
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Function Descriptions
Menu Bar
The Menu Bar allows you to manage test model settings, view test log/
model information, set/reset APMPT-4 password, and change language
displayed.
Quick Launch Buttons
The Quick Launch Buttons allow you to load/reload test model settings,
connect to the NuServer, and lock test model.
DUT Information
This section of the main window contains the DUT„s logo and model
name.
Task Running Status
This section of the main window contains general information/status of the
tasks that are currently running.
Status Bar
The Status Bar shows the APMPT-4‟s running status.
System Status
The System Status displays running processes of APMPT-4 system.
Test Control & Status
The Test Control & Status section contains test control buttons (which
allow you to Start/Stop/Pause/Resume tests) and general test information.
Test Result/Report
This section allows you to view the test results.
3.2. APMPT-4/NuServer Main Window Overview
APMPT-4 Main Window
25
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Description
Module Card
Information
This section displays the information regarding to the model cards that are
installed on NuStreams-2000i/600i. Model Card IDs are showed as the
format of (X, Y, Z) while X is the number of the chassis (which is displayed
on NuStreams-2000i/600i), Y is the slot number where this model card is
installed, and Z is the available port number located on the model card.
Connection
Function
You can reconnect a link down status or force to disconnect your
NuStreams-600i/2000i to your PC.
NIC Information
This section displays the detail information (including NIC Model name,
NIC‟s MAC address) regarding to the selected NIC.
NuServer Version
This section displays the version of your NuServer.
NuServer
26
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
File Menu Bar Overview
New Model Wizard
Choose this option to start the New Model Wizard. The New Model Wizard allows
the users to set testing options for DUT. For detail descriptions regarding to the
New Model Wizard and its settings, please refer to”4. Creating Task via New
Model Wizard”.
Load Model
Load a previously-saved configuration file and
apply these settings to APMPT-4.
All the configurations you‟ve made via New
Model Wizard will be saved as a “*.xml” file,
along with several “*.cfg” files.
Please note that these “*.cfg” files contain test
settings as well. Deleting them will cause your
“*.xml” file unable to load properly.
Modify Model
Choose this option to make changes to the current test settings for DUT. For detail
descriptions regarding to these settings, please refer to the section down below.
Exit
A prompt pop-up window will ask if you are sure to
exit APMPT-4. Click Yes to exit APMPT-4, or click
No to cancel.
3.3. Menu Bar
APMPT-4 Menu Bar includes configuration options such as File, View, Tools, Security, Language, and
Help. Please refer to the sections down below for detail information regarding to each configuration
option.
3.3.1. File
27
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
View
Latest Log
Choose Latest Log allows you to view the latest test log file (in “*.txt” format).
Log Folder
Choose Log Folder, and then the folder where all the saved test logs of the current test
model will be opened.
Model Folder
Choose Model Folder, and then the folder where all the DUT model configuration files are
saved will be opened. The default Log folder file path is under “C:\Program
Files\NuStreams\APMPT-4 v2.1b004\config”.
Module
Information
The Module Information window displays all the module cards that are installed on
NuStreams-2000i/600i and their detail information. To close the Module Information
window, click OK button.
NuServer
Display the NuServer window. For more information regarding to NuServer window,
please refer to “3.2. APMPT-4/NuServer Main Window Overview”.
Simple Style
Choose Simple Style will make you run the tests under a simple mode.
3.3.2. View
28
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Tools
Import DUT
Logo
You can load an image file that represents the DUT for testing via Import DUT Logo
function. The image file you chose will be shown on DUT Logo field of the Main
Window.
Logo Preview: The image you‟ve chosen will be displayed in this field for
preview.
Import: Click this button to choose the image file that will be displayed.
OK: Click this button to apply the changes you‟ve made.
Cancel: Click this button to abandon all the changes you‟ve made and exit
Import Logo Window.
TW Barcode
System Setting
The Setting is for TW Barcode System
Force to
Release Module
When the test encounters some unexpected problems which lead the board dead, or
other tests need to lock the current board, you can choose Force to Release Module
to obtain the board again.
3.3.3. Tools
29
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Security
Logout
Logout from Admin Mode and switch APMPT-4 to Operator Mode.
Login/Change
Account
Login to the Admin Mode.
Change
Password
You can change the password for Admin Mode here.
For security reasons, it is recommended to change
APMPT-4‟s password after you first login.
Old Password: Enter the old password here.
New: Enter the new password here. The new
password should be 6~12 characters and
mustn‟t contain special symbols.
Confirm: Please type your new password again
for confirming.
OK: Apply all the changes you‟ve made and
apply.
Cancel: Cancel and abandon all the changes
you‟ve made.
Reset
Password
If you forget APMPT-4‟s Admin Mode password, you can reset the password to the
default password “xtramustech”.
Click Yes to start resetting the login password (or No to cancel), and click OK to
complete.
Always login
in OP Mode
Every time when APMPT-4 starts running, it will run under Operator Mode.
3.3.4. Security
APMPT-4 can run under Admin Mode and Operator Mode:
Admin Mode: Users have the maximum authorization and can access all APMPT-4‟s functions.
Operator Mode: Users are only allowed to access APMPT-4‟s basic functions such as loading
saved DUT model test settings and view latest test log/module card information/NuServer
30
E-mail: sales@xtramus.com
Website: www.Xtramus.com
XTRAMUS TECHNOLOGIES®
Language
English/
Chinese
Simplified
APMPT-4 has 2 different languages for its UI available. You can set the language of UI to
either English or Simplified Chinese.
Help
About
APMPT-4
The About APMPT-4 window will pop up
and show detailed system information.
Xtramus Web
Click this option to access to Xtramus official website.
System
Requirement
The “System Requirements” window will pop up and
show the requirements for your PC and the
FPGA/Firmware/PROM version limit of the module
cards. Click the Ok button to exit the “System
Requirements” pop up window.
3.3.5. Language
3.3.6. Help
Loading...
+ 115 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.