vxl thin client presentation

40
Product Roadmap Presentation

Upload: vibhu-kodapully

Post on 16-Apr-2017

526 views

Category:

Small Business & Entrepreneurship


0 download

TRANSCRIPT

Page 1: Vxl Thin Client presentation

Product Roadmap Presentation

Page 2: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 2

About Established in 1976

370+ Employees Worldwide

Publicly Quoted (Bombay Stock Exchange)

Corporate HQ - Bangalore, India

EMEA HQ - Manchester UK, opened 1992

EMEA Satellite Offices ◦ France & Germany

USA HQ - Houston, Texas, opened 2005

APAC & SEA - Singapore, opened 2010

UAE – Dubai, opened 2012

Page 3: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 3

VXL Manufacturing Infrastructure

ISO 9000:2000 (Quality Management)

ISO 14001:2004 (Environmental Management)

Two state-of the-art facilities in Bangalore, the heart of India’s Silicon Valley

Production capacity - approx.1 million units per year

Highly skilled workforce including 80 software engineers

Advanced infrastructure including:◦ 20,000 sq.ft dust / static free zone◦ Flexible conveyor systems

Page 4: Vxl Thin Client presentation

Hardware & Software Roadmaps

Page 5: Vxl Thin Client presentation

Zero Client Desktop Roadmap

CY 2Q 2013 CY 3Q 2013 CY 4Q 2013 CY 1Q 2014 CY 2Q 2014 CY 3Q 2014 CY 4Q 2014 CY 1Q 2015 CY 2Q 2015 CY 3Q 2015 CY 4Q 2015

Citrix XtonaPro (Md Series) - Dual Core, 6x USB, Parallel, Display, 2x Serial Ports (opt.3 rd)

VMware Horizon PCoIP Vtona V200 – Dual DVI , 4x USB

Citrix Xtona (F12z Series) – VIA 1.2GHz Nano Processor, 8 USB, VGA & DVI-I, 2x Serial Ports

Citr

ix S

olut

ions

VMw

are

Solu

tions

J12-z Series – Zero Configured - ARM SoC TI Chipset, 1.0GHz , VMware, Citrix, Microsoft RDP

VMware Horizon PCoIP Vtona V240 - Quad Displays ,Teradici TERA2140, 4x USB

VMware ‘PoE’ Power-over-Ethernet PCoIP Vtona V200-PE – Dual DVI, 4x USB

Page 6: Vxl Thin Client presentation

Desktop Thin Client Roadmap

Mid

-Ran

geH

igh

Perf

orm

ance

CY 2Q 2013 CY 3Q 2013 CY 4Q 2013 CY 1Q 2014 CY 2Q 2014 CY 3Q 2014 CY 4Q 2014 CY 1Q 2015 CY 2Q 2015 CY 3Q 2015 CY 4Q 2015

Entr

y

F Series – VIA Nano 1.2GHz processor, 8 x USB, VGA & DVI-I, 2x Serial Ports

Md Series Dual Core - VIA Eden 2x, 1.0GHz, 6x USB, DP, DVI, Parallel, 2x Serial Ports (Opt 3rd)

Md+ Series Dual Core - as Md Series + PCIe slot for 2/4 displays

K64 Series – SoC TI ARM Cortex A9 , Gio 6 Linux, 4 USB, DVI-I, <5 Watts

J64 Series – SoC TI ARM – 1.0Ghz processor, Gio 6 Linux, 4 USB, DVI-D, DVI-I

LQ+ Series Quad Core - as LQ series +PCIe Slot for 2/4 displays

LQ Series Quad Core - 1.5GHz Processor, HDMI, Display & Serial Port, Six USBs

IQ-B Series Quad Core - Bay Trail

Page 7: Vxl Thin Client presentation

VXL- Lenovo Thin ThinkPad Notebook Roadmap

Mob

ile T

hin

Not

eboo

k

Intel Celeron 2.0GHz , 8GB Flash, 2GB RAM, WES7, 3G Mobile Broadband

CY 4Q 2014 CY 1Q 2015 CY 2Q 2015 CY 3Q 2015 CY 4Q 2015

TL440 - 14” Lenovo Thin ThinkPad Mobile NotebookTL131 – 11.6” Notebook

Page 8: Vxl Thin Client presentation

Fusion Universal Device Manager & CloudDesktop Software Solutions

Extend the life of aging, legacy PC desktops & notebooks.

CloudDesktop™- Repurposing Software

Fusion™ - Universal Device Manager

CY 2Q 2013 CY 3Q 2013 CY 4Q 013 CY 1Q 2014 CY 2Q 2014 CY 3Q 2014 CY 4Q 2014 CY 1Q 2015 CY 2Q 2015 CY 3Q 2015 CY 4Q 20115

Fusion-Professional

Fusion-Premium

Page 9: Vxl Thin Client presentation

VXL Operating SystemsWindows EmbeddedWindows 2009 Embedded Standard• Compatible with XP Professional

Windows 7 Embedded Standard• Compatible with Windows 7 Pro

Windows 8 Embedded Standard• Compatible with Windows 8 Pro

Gio 6 Linux Newly introduced in 2015

Superseded previous Gio v5

Modular Component Upgrade for OS and Applications

Xtona Zero OSLinux powered

Requires ZERO configuration on unit

Uses a central configuration file

Simple and fast to configure using INI and INI Configurator

Windows CE.netOlder legacy OS

Specialist legacy customers

Will be succeeded by Windows 8 Industrial

Page 10: Vxl Thin Client presentation

Thin, Cloud & Zero Client Hardware Solutions

Page 11: Vxl Thin Client presentation

Citrix HDX, VMware Horizon View & Microsoft RDP 1.0 GHz ARM Processor CPU 4 GB Flash / 1 GB RAM 1 DVI-D, 1 DVI-I Port 4 USB Ports (2x Front, 2x Rear) Built-in 10/100/1000 Networking Dual Display Support with integrated GPU / 3D graphics Three year limited warranty

J 12-z - SoC , Zero ClientARM Processor,4 GB Flash, 1 GB RAM

Zero Clients - J12-z Entry-Level ‘Zero Configured’ desktop with ARM 1.0GHz processor & TI Chipset. J12-z Series

Page 12: Vxl Thin Client presentation

VIA Nano U3300 1.2 GHz processor North Bridge: VIA VX900 Dual monitor support via DVI + VGA outputs 8 GB Flash / 2GB RAM (expandable to 4 GB RAM) 8 USB (2.0) ports and 2 Serial ports Built-in 10/100/1000 Networking 32 Bit graphics supports Built-in Kensington Security Slot Three year limited warranty

F12z - Zero ClientVIA 1.2 GHz NanoProcessor

Zero Clients - Xtona F12z Mid-range desktop with VIA 1.2GHz Nano processor. F12z Series

Page 13: Vxl Thin Client presentation

VIA Eden U4200 1.0 GHz Dual Core Processor North Bridge: VIA VX900 1 GB Flash / 2 GB RAM 1 Display, 1 DVI-I Port 6 USB (2.0), 3 Serial & 1 x Parallel Port 16 / 32 Bit Graphics supports;

VGA: 1920 x 1200, 60Hz (via VGA dongle)

DVI-I 1920 x 1200, 60Hz Display Port 2048 x 1536, 75Hz

Three year limited warranty

XtonaPro - Md SeriesVIA Eden 1.0 GHz Dual Core Processor

Zero Clients - XtonaPro Md Series High Performance - VIA Eden 1.0 GHz Dual Core processor. XtonaPro Md Series

Page 14: Vxl Thin Client presentation

Zero Clients – Vtona V200 PCoIP

Vtona V200 PCoIP® Zero Client with Dual DVI

Teradici 2321 PCoIP® portal processor VMware Horizon View certified 512 MB RAM 4 USB (2.0) Ports Dual DVI-I connectors for dual display support Three Year Limited Warranty

True Zero Client with Teradici 2321 PCoIP portal processor.

Vtona - V200 Teradici PCoIP Portal Processor with Dual DVI

Page 15: Vxl Thin Client presentation

Zero Client s – Vtona V200-PE PCoIP Power-over-Ethernet (PoE)

Vtona V200-PE Power-over-Ethernet (PoE) Zero Client

Power-over-Ethernet (PoE) for simple, single cable set-up Eco-friendly 6.5 Watts Power Consumption Teradici TERA2321 PCoIP® Portal Processor Dual DVI Support VMware Horizon View certified 512 MB RAM 4 USB (2.0) Ports Three year Limited Warranty

True Zero Client with latest Teradici TERA2321 PCoIP portal processor.

Vtona V200-PE Power-over-Ethernet (PoE) PCoIP Zero Client

Page 16: Vxl Thin Client presentation

Zero Clients – Vtona V240 PCoIP with Quad Display Ports

Vtona V240 PCoIP® Zero Client with Quad Displays

Teradici 2140 PCoIP® portal processor Quad Display Ports VMware Horizon View certified 512 MB RAM 4 USB (2.0) Ports Three Year Limited Warranty

True Zero Client with latest Teradici 2140 PCoIP portal processor.

Vtona - V240 Teradici PCoIP Portal Processor with Quad Display

Page 17: Vxl Thin Client presentation

DesktopsEntry-Level, Mid-Range & High

Performance

Page 18: Vxl Thin Client presentation

ARM Processor Cortex A9 Gio 6 Linux Operating System 2 GB Flash / 1 GB RAM 1 DVI-I Port 4 USB (2.0) Ports (2x Front / 2x Rear) SD Card Slot Built-in 10 /100 Networking Optional Internal Wireless LAN 32 Bit Graphic Support: 1920 x 1200 @ 60Hz Three year limited warranty

K64 Series SoCARM Processor,2 GB Flash, 1 GB RAM

Entry-Level SoC Desktop - K64 Entry Level SoC Desktop with ARM Processor Cortex A9. K64 Series

Page 19: Vxl Thin Client presentation

Gio 6 Linux Operating System Citrix / VMware compatible 1.0 GHz ARM Processor CPU 4 GB Flash / 1 GB RAM 1 DVI-D, 1 DVI-I Port 4 USB (2.0) Ports (2x Front, 2x Rear) Built-in 10/100/1000 Networking Dual Display Support with integrated GPU / 3D graphics Three year limited warranty

J 64 - SoC desktop1.0 GHz ARM Processor,4 GB Flash, 1 GB RAM

SoC Desktops – J64 Mid-Range, General Purpose Desktop with ARM 1.0GHz processor & TI Chipset. J64 Series

Page 20: Vxl Thin Client presentation

VIA Nano U3300 1.2 GHz processor North Bridge: VIA VX900 Dual monitor support via DVI + VGA outputs 8 GB Flash / 2GB RAM (expandable to 4 GB RAM) 8 USB (2.0) ports, 2 Serial ports Built-in 10/100/1000 Networking 32 Bit graphics supports Built-in Kensington Security Slot Three year limited warranty

F SeriesVIA 1.2 GHz NanoProcessor

Desktops - F SeriesMainstream Performance VIA Nano 1.2GHz processor. F Series: F26 (WES2009), F27 (WES7) & F64 (Gio 6 Linux) F Series inc. PowerTerm: F23 (WES2009), F24 (WES7) & F65 (Gio 6 Linux)

Page 21: Vxl Thin Client presentation

VIA Eden U4200 1.0 GHz Dual Core Processor North Bridge: VIA VX900 8 GB Flash / 2 GB RAM (expandable up to 4 GB RAM) 1 Display and 1 DVI-I Port 6 USB (2.0) , 2 Serial (Opt.3rd) Ports & 1 Parallel Port 16 / 32 Bit Graphics supports;

VGA: 1920 x 1200, 60Hz (Via VGA dongle)

DVI-I 1920 x 1200, 60Hz Display Port 2048 x 1536, 75Hz

Optional USB smart card readerMd SeriesVIA Eden 1.0 GHz Dual Core Processor

Desktops - Md Series High Performance VIA Eden 1.0 GHz Dual Core processor. Md Series: Md26 (WES2009), Md27 (WES7) & Md64 (Gio 6 Linux) Md Series inc. PowerTerm: Md23 (WES2009), Md24 (WES7) & Md65 (Gio 6 Linux)

Page 22: Vxl Thin Client presentation

VIA Eden U4200 1.0 GHz Dual Core Processor North Bridge: VIA VX900 8 GB Flash / 2 GB RAM (expandable up to 4GB) PCIe Slot 1 Display & 1 DVI-I Port 6 USB (2.0) & 1 Serial Port Built-in 10/100/1000 Networking Optional mini PCIe wireless LAN & USB smart card reader Three year limited warranty

Md+ SeriesVIA Eden 1.0 GHz Dual Core Processor

Desktops - Md+ Series with PCIe High Performance VIA Eden 1.0 GHz Dual Core processor. Md+ Series: Md+26 (WES2009), Md+27 (WES7) & Md+64 ( Gio 6 Linux) Md+ Series inc. PowerTerm: Md+23 (WES2009), Md+24 (WES7) & Md+65 (Gio 6 Linux)

Page 23: Vxl Thin Client presentation

Intel Baytrail-D Celeron Quad Core Processor Built-in Intel HD graphics 4GM RAM / 16GB Flash 7 USBs including one USB 3.0 1x VGA / 1x HDMI / x 1 Serial Port Built-in 10/100/1000 Networking Dual Display Support with max. 1920 x 1200 resolution. Size: 50 x 229 x 226 mm (W x H x D) / Weight 2.5Kg Three year limited warranty

IQ-B Series WES7, WE8S & LinuxIntel Baytrail-D Celeron Quad Core Processor

Desktops – IQ-B Series High Performance - Intel Baytrail-D Celeron Quad Core Processor. IQ-B Series: Windows Embedded Standard (WES7,WE8S) & Gio 6 Linux OS

Page 24: Vxl Thin Client presentation

1.5 GHz AMD Kabini Quad Core SoC Processor 8 GB Flash (expandable up to 32GB) / 2 GB RAM (expandable up to 4 GB RAM) 1x HDMI , 1x Display and 1x Serial Port 6 USBs (4x USB 2.0, 2x USB 3.0) and 2 USB (Secure) Radeon HD8330 Graphics Processor Windows Embedded Standard Operating systems - WES 7 and WE8S LQ+ version includes PCIe slot Three Year Warranty as standard LQ and LQ+ (with PCIe)

1.5 GHz AMD Kabini Quad Core SoC Processor

Desktops - LQ & LQ+ Series Quad Core , WES7 and WE8S.High Performance AMD Kabini 1.5 GHz Quad Core SoC processor.

LQ Series: LQ27 (WES7) & LQ29 (WE8S) LQ+ Series with PCIe slot LQ+27 (WES7) & LQ+29 (WE8S)

Page 25: Vxl Thin Client presentation

Notebooks - 14” Thin ThinkPad – TL440 Lenovo Thin ThinkPad 14” Mobile Client

Microsoft Windows Embedded, WES 7 operating system 2.0 GHz Intel Celeron 2950M Processor 14" HD LED display Flash & RAM memory - 8GB Flash / 2GB RAM Gigabit LAN and 3G Mobile Broadband Support Integrated Nividia N14M Graphics 1 USB 3.0, 3 USB 2.0 , 1 VGA, 1 Mini Display Port 720p HD Camera / 4 in I Card Reader Small footprint - 344 x 239 x 29 mm (W x D x H ) Long Life 6 Cell Lithium-ion Battery Three Year Limited Warranty

14” Lenovo Thin ThinkPadTL440 Mobile Notebook

Page 26: Vxl Thin Client presentation

Software Solutions – Fusion UDM™ & CloudDesktop™

Page 27: Vxl Thin Client presentation

Core Features Device Discovery & Device Configuration

◦ Quick and easy device discovery and configuration of thin clients, PC’s, POS

Software and Application Updates

Highly Intuitive◦ Manage thousands of devices in a heterogeneous and multi-site set-up

Totally Secure Management ◦ Uses HTTPS connections for full integrity between agents and server.

Instantaneous Reporting ◦ Real time and intelligent monitoring of devices

‘Fusion’- Enterprise Level Device Manager

An enterprise-level management software solution for managing all Windows, Windows Embedded or VXL Linux thin clients, PC’s & POS Devices

Page 28: Vxl Thin Client presentation

VXL Thin & Cloud Desktops Mobile Notebook PCsNon-VXL Thin & Cloud

Client Desktop brands Mobile Tablet Devices

Fusion Device Manager eases the transition to your new virtualized environment by providing one management console for “ALL” your Thin Clients, PC’s and POS devices running Windows, Windows Embedded or VXL Gio Linux operating systems.

POS Conventional Desktop PCs

Fusion Device Manager™

Page 29: Vxl Thin Client presentation

Fusion VDI Transition Management Solutions vs Competition

Thin Client/Desktop/Mobile Management - Enterprise Level

Dell / Wyse Device Manager- Dell / Wyse Devices Only

Thin Client Management - Enterprise Level

HP Device Manager

- HP Devices Only

Thin Client Management - Enterprise Level

VXL Fusion Device Manager- All Windows Embedded Thin Clients- All VXL Gio Linux Thin Clients- All Windows Desktops- All Windows Mobile inc. Tablets- All Windows Embedded POS Devices

VXL Competition

Page 30: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 30

The Now & The Future Fusion UDM Professional launched on June 1st 2015

Fusion UDM Premium launching on July 8th 2015.

Fusion Premium◦ Primarily designed for the SMB to Small Enterprise market◦ Now Manages

◦ Windows Embedded◦ Windows PC Oss◦ VXL Linux

IOS, Windows Mobile and BYOD manageable later in 2015

Page 31: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 31

Verixo Advanced Development Lab Fusion Professional & Premium have been written in-house by Verixo, a VXL group company

Based in Mumbai, India

Operated by Verixo Technologies – A VXL Sister Company

70+ Strong engineering team◦ 20+ Linux Engineers◦ 20+ Windows Application Engineers◦ 10+ Mobile Device Engineers◦ 15+ SQA◦ 5+ Network Engineers

Page 32: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 32

Fusion in One Word … Universal!

Page 33: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 33

Fusion ProfessionalGrouping DevicesDevices can be grouped using up to 10 hierarchical steps using manual or auto grouping

Supported DevicesAll VXL thin clients (WIN/LIN), PC’s powered by Windows and CloudDesktop. 3rd Party WIN TC.

Device DiscoveryBy DNS NameDHCP Scope OptionBroadcast and Manual

Basic Patch ManagementDeploy patches to thin clients and Windows PC’s using the basic patch management system

Configure DevicesYou can configure both Windows and Linux devices in a granular manner using various FDM tasks

Remote Imaging of DevicesDevices can be imaged with the latest OS from the central Fusion server easily and on-mass

Remote Control DevicesYou can remote control devices using VNC and/or RDP depending on the OS on the device.

Tasks & Template ManagementCreate individual tasks and publish, or group into templates to send to devices and groups

Comprehensive ReportingTens of pre-defined reports are provided to cover a multitude of subjects.

Lower Power UsagePower management features allow the control of device power states, saving huge costs.

Group ProfilesCreate individual tasks and publish, or group into templates to send to devices and groups

LicensingFree with all VXL OS buildsChargeable for PC’sChargeable for 3rd Party WIN TC’s

Support & MaintenanceYear One includedOn-going charged /device/yearSaaS model inclusive of SaM

Page 34: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 34

Fusion Premium

LicensingOn-Premise Perpetual/deviceOn-Demand Hosted SaaS modelOn-Premise SaaS model

All of Fusion Professional and …

Mobile Device ManagementManage Android mobile device platforms. Apple iOS and Windows Phone follow soon.

BYOD ManagementManage your devices between home and office using the BYOD management capabilities

Enterprise DashboardsImportant information is displayed in an interactive dashboard.

Enhanced Patch ManagementManage TC and PC patch requirements with enhanced detection and workflow

Inventory ControlPerform accurate audits of your infrastructure with enhanced inventory control

Anti-Virus ManagementManage patches and updates for the installed AV software automatically

Multi-Device Remote ControlShadow and control multiple devices simultaneously via a interactive video wall

Agentless DiscoveryDiscover devices using agentless discovery method and deploy the agent once discovered.

Application Patch ManagementManage and deploy application updates for Microsoft applications with control.

ComplianceEnsure that all devices meet the standards set by your organization.

Software License MeteringStay within the legal boundaries with FDM license metering. Saves you on over-licensing.

Preventative MaintenanceLive health monitoring of devices allows preventative maintenance tasks to be run as required.

Secure Desktop ServicesSecure your desktop PC or VDI using layered security technology .. files, folders, or both.

OptionalAdd-On

Support & MaintenanceChargeable per device/year

SaaS model inclusive of SaM

Page 35: Vxl Thin Client presentation

Fusion UDM “Bring Your Own Device - BYOD”

Android

iOS

Windows Phone

Out of Office In Office

Fusion Server

Office AppsD,E,F, 1

Personal Tablet

Profile

Personal Apps: A,B,C, 1 (Chrome)

Office Apps: D,E,F, 1 ( Chrome)

Step 1: Admin downloads appropriate “Agent” from App Store

Step 2: Admin registers Device on Fusion Server

Step 3: Admin creates device “Profile”

Step 4: User can only access “Office Apps” in Office Personal Apps return when user leaves Office

Note: “Out of Office” you can be in two modes:

- Access to Personal apps only

- Dialed into VPN with access to Office Apps only

BYOD Available 4Q15

Personal Apps: - A,B,C, 1 (Chrome)

Page 36: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 36

A Fresh, New Look

Page 37: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 37

2015 Roadmap… Fusion UDM Premium Roadmap 2015

New Products in 2015

June

201

5Version 1.0Fusion UDM Pro ReleaseMDM for AndroidPhase 1 Ju

ly 2

015Fusion UDM

Premium releaseEvent monitoring & preventive maintenanceOnline License ManagerMDM for Android DevicesPhase 2

Augu

st 2

015Concentrator/Data

gathering moduleFeatures for managing POS & Kiosk devices

Sept

embe

r 201

5MDM for Apple iOS Devices

Oct

ober

201

5MDM for Windows Phone

Nov

embe

r 201

5Windows Server SupportMac OS X Support

Dece

mbe

r 201

5VMware & XenDesktop VDI Management

End

July

201

5SmartClient for SmartBoard & Smart Projector

End

Augu

st 2

015KeyGuard

Secure Desktop Services

End

Sept

embe

r 201

5Captiva Digital SignageBasic Edition

End

Nov

embe

r 201

5Captiva Digital SignageProfessional Edition

Page 38: Vxl Thin Client presentation

User-friendly and Quick Installation◦ Fast and easy, out-of-the-box solution

Prolong the use of existing hardware investment◦ Derive advantages of thin & cloud client computing without the cost of new hardware

Compatibility with Industry Protocols◦ Citrix, VMware View, Microsoft RDP, Virtual Bridges Spice Verde, Quest vWorkspace

Effective Central Management of repurposed devices ◦ When used in conjunction with VXL’s Fusion UDM

Cost Effective◦ Excellent cost savings - available at a fraction of the cost of a new desktop or laptop

CloudDesktop - PC Repurposing Software

Give legacy PC’s a new lease of life with VXL’s CloudDesktop repurposing software

Page 39: Vxl Thin Client presentation

VXL CloudDesktop - Perpetual Licensing For perpetual use ..

◦ User simply orders licenses per desktop◦ Receives license key◦ Enters license key into VXL-LM◦ Generates Activation Request (AR)◦ Emails AR to VXL

[email protected]◦ Receives back activation key

◦ Within 24 hours◦ Activates license key

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 39

Page 40: Vxl Thin Client presentation

3 May 2023 © VXL INSTRUMENTS LTD - CONFIDENTIAL 40

Thank you

Merci

Dankeблагодаря

Děkujeme

Tak 谢谢शकु्रि�या

ありがとう 감사합니다شما از تشکر با

شكراспасибо

شکری آپکا

¡graciasDiolch yn fawr דַאנק ַא

Þakka þér