Empowered by Innovation. PVAU NAT Traversal Manual P/N Rev 2, June 2009 Printed in U.S.A. Technical Support Web Site:

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1 Empowered by Innovation Technical Support Web Site: PVAU NAT Traversal Manual P/N Rev 2, June 2009 Printed in U.S.A.

2 This manual has been developed by NEC Unified Solutions, Inc. It is intended for the use of its customers and service personnel, and should be read in its entirety before attempting to install or program the system. Any comments or suggestions for improving this manual would be appreciated. Forward your remarks to: NEC Unified Solutions, Inc. 4 Forest Parkway Shelton, CT necunifiedsolutions.com Nothing contained in this manual shall be deemed to be, and this manual does not constitute, a warranty of, or representation with respect to, any of the equipment covered. This manual is subject to change without notice and NEC Unified Solutions, Inc. has no obligation to provide any updates or corrections to this manual. Further, NEC Unified Solutions, Inc. also reserves the right, without prior notice, to make changes in equipment design or components as it deems appropriate. No representation is made that this manual is complete or accurate in all respects and NEC Unified Solutions, Inc. shall not be liable for any errors or omissions. In no event shall NEC Unified Solutions, Inc. be liable for any incidental or consequential damages in connection with the use of this manual. This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this document may be photocopied or reproduced without prior written consent of NEC Unified Solutions, Inc by NEC Unified Solutions, Inc. All Rights Reserved. Printed in U.S.A.

3 UX5000 PVAU NAT Traversal Issue 2.0 PVAU NAT Section 1 Introduction The UX5000 PVAU NAT application, also referred to as SIP ALG, provides users the flexibility to install and activate UX5000 IP terminals or UX Softphones. One PVAU blade with the PVAU NAT application (compact flash) provides connections for 32 remote devices. VoIP to remote networks with NAT will be supported on the UX5000 by interpreting some of the commonly available information on i-sip protocol to infer the details of the remote networks. A SIP registration message contains the IP Address of the SIP multiline terminal embedded inside the service change message. However, the IP address received from the UDP packet (socket) will be the Public IP address of the NAT router at the remote site. The NAT application on the PVAU blade will create an entry in a translation table upon receiving a registration request for a terminal. This table consists of public IP address and public ports for RTP and SIP. Each of these will be mapped to a SIP ID and carries a tag internal to the firmware on the PVAU. Inside the PVAU NAT application, instead of treating the SIP messages based on IP addresses, the SIP ID will be used when referring to a terminal. Whenever a signal or voice packet needs to be forwarded to a specific SIP ID, a reverse translation is made based on the unique ID for that SIP from the translation table. The contents of SIP messages coming to/from the terminal to the UX5000 will be parsed and re-written to enable transparent operation of the network address translation. 1

4 Issue 2.0 UX5000 PVAU NAT Traversal Section 2 Features The PVAU NAT application provides the ability to operate an NEC UX5000 SIP terminal or UX Softphone behind a NAT router at a remote location. The PVAU blade with NAT application provides a security layer for the more critical functions of the UX5000. Multiple static WAN IP addresses at the location where the UX5000 is installed will not be necessary. The PVAU NAT application is implemented on a separate compact flash that contains this application. The compact flash is usable on any PVAU blade hardware. In most cases, the end user is not required to reprogram the NAT router at SOHO/remote location for operation. The PVAU NAT application will learn the phone numbers and associated information dynamically by being a proxy to the terminal. The PVAU NAT application allows the user to configure the following using the web interface: o PVA-NAT IP address, subnet mask and a default gateway. o SIP Server IP address (IP address of the CCPU - in Program ) o SIP Server Port (SIP port of the CCPU - in Program ) o Base Port (40000 by default) o Secure login and password 2

5 UX5000 PVAU NAT Traversal Issue 2.0 Conditions The IP address of the PVAU NAT application will be defaulted to /24 when performing an upgrade/downgrade. It is necessary to log in with this address and set the SIP ALG parameters manually and then reset the blade to resume normal operation. The PVAU NAT (PVAU blade) must be assigned with a static Internet (WAN) IP address. It must have a separate public IP address from the UX5000. When the CCPU and VOIPDB (32, 64, 128) are located behind a NAPT router (local addresses), the NAPT router must be programmed for static port forwarding on the following IP Ports: - UDP Port 5080 (or entry in Program ) - UDP Port Range (or entry in Program The PVAU NAT application must be programmed independently of the UX5000 programming. The IP address cannot be assigned from CCPU Program It will need to be programmed from the web GUI on the PVA-NAT application. The default IP address is /24. The PVAU blade is not visible on a PCPro database. Accordingly, power allocation will not be calculated by PCPro when the PVAU blade is installed. Supported terminals include the UX5000 desktop keyset, UX Desktop Applications/UX Softphone. NOT supported are Aspire keysets or standard SIP terminals. The PVAU NAT blade is not licensed, however, a SIP MLT terminal/ux Softphone license is required. BGM and MOH are not supported. Encryption is not supported by PVA-NAT. Encryption option (Programs and ) must be disabled on the UX5000 and in the UX5000 IP terminal/ux Softphone. 3

6 Issue 2.0 UX5000 PVAU NAT Traversal Multicast (MOH/Paging) is not supported. If a NAT caller calls into the UX5000 and is put on hold towards the NAT caller, then the NAT caller will not hear MOH, if multicast method is used. The NAT traversal function on the PVAU is intended for a plug-and-play environment with NAT routers. However, if a NAT router with port masquerading (when a port on the inside of the NAT is not exposed to the WAN side of the NAT) is used, the NAT traversal may not work. Only one IP terminal (UX5000 IP terminal or UX Softphone) is supported for any given NAT router. The PVAU blade with NAT application will support up to 32 remote terminals, but each terminal must reside behind a separate NAT router. Cascaded NAT (Nested NAT) is not supported. This application will not work in routers with NAT firewall functionality. If such a firewall exists, then the router must be programmed to either (a) put the IP terminal in a DMZ or (b) create port forwarding for RTP and SIP ports. The application may not work in a hotel/motel network where a login is required to enable internet for a room. The NAT Router must support port forwarding of Internet Protocol. Typically, NAT router manufacturers specify this feature as Port Forwarding or Port Trigger. Note: Make sure the router supports protocol (TCP or UDP) based port forwarding. The local interface to which the UX5000 IP terminal or UX Softphone connects must meet ethernet standards preferably 100Mbps ethernet ports on the intranet/lan side. A NAT router which is optimized for real-time data traffic is preferred. These are typically identified as supporting internet games or other real-time high traffic applications. Not all NAT routers are the same. The quality of NAT routers vary with respect to its ability to handle large quantities of data within a short span of time typically known as throughput, or the ability to block/unblock voice or SIP traffic. 4

7 UX5000 PVAU NAT Traversal Issue 2.0 Peer-to-peer integration will not be supported by NAT-enabled UX5000 IP terminals. All voice traffic will travel through the network location where the UX50000 with the PVAU NAT application is located. Program must be turned off. Packet loss of 1% or less is recommended with the maximum of 3% from end to end. Bandwidth will vary depending on the media, payload and audio algorithms utilized. Default Settings None System Availability Available with main software version 2.50 IP terminal firmware Terminals UX5000 IP Terminals Desktop Applications/UX Softphone Required Component(s) CCPU VOIPDB (32, 64,128) PVAU Blade with NAT Application Appropriate Licensing for SIP MLT terminals/ux Softphones Related Features UX5000 Desktop Applications IP Multiline Station (SIP) 5

8 Issue 2.0 UX5000 PVAU NAT Traversal Configuration Example Note that the PVAU NAT requires a separate public IP address as it is connected directly to the internet (before the router for the UX5000). The defined IP addresses shown in the above graphic are examples only and your entries should be specific to your network environment. 6

9 UX5000 PVAU NAT Traversal Issue 2.0 Section 3 UX5000 Requirements 3.1 Main Software PVAU NAT is supported with the version 2.50 or higher release of the UX Hardware The UX5000 needs the following items: CCPU (version 2.50 or higher) VOIPDB (32, 64, 128) PVAU blade with NAT Application Capacity 512 Extensions/200 Trunk ports (as allowed by hardware and licensing) 3.3 License The UX5000 must be licensed for UX5000 IP Terminals and/or Desktop Applications UX Softphone. 7

10 Issue 2.0 UX5000 PVAU NAT Traversal Section 4 Considerations for Choosing a NAT Router When choosing a NAT router for inter-working with UX5000 voice over IP implementations, the following features are required on the router: The NAT Router must support port forwarding the internet protocol. Typically, NAT router manufacturers specify this feature as port forwarding or Port Trigger o Note: Make sure the router supports protocol (TCP or UDP) based port forwarding. The Local Interface to which the VoIP terminal and/or software terminal connects must meet ethernet standards preferably 100Mbps ethernet ports on intranet/lan side. A NAT router which is optimized for real-time data traffic is preferred. These are typically identified as supporting internet games or other real-time high traffic applications. 4.1 Considerations for Voice Quality When Using NAT When using a NAT router, especially the ones that are readily available for home or small office usage, the following must be considered with respect to voice quality. Not all NAT routers are same. Depending on the quality of the router functions, the quality of NAT router varies with respect to its ability to handle large quantities of data within a short span of time typically known as throughput, or the ability to block/unblock voice or SIP traffic. Depending on the capability of a NAT router used in a home office environment, it may support one or sometimes more than one IP terminal. Peer-to-Peer integration will not be supported by NAT-enabled UX5000 IP terminals. All voice traffic will travel through the network location where the UX5000 with SIP Station application is located. Packet loss of 1% or less is recommended with the maximum of 3% from end to end. Bandwidth will vary depending on the media, payload and audio algorithms utilized. 8

11 UX5000 PVAU NAT Traversal Issue 2.0 Section 5 Installation When purchased, the Packet Voiced Application blade [PVAU blade] will support multiple applications. Users can load specific compact flash solutions such as the PVAU NAT application. 1. The PVAU blade with PVAU NAT application can be installed in the chassis in any available slot, it does not require UX5000 blade type configuration. Upon a successful initialization, the far right LED will flash green. This process may take up to 3 minutes. 9

12 Issue 2.0 UX5000 PVAU NAT Traversal Section 6 Guide to UX5000 Programming The Level 1, Level 2 and Level 3 columns indicate the programs that are assigned when programming this feature in the order they are most commonly used. These levels are used with PCPro and WebPro wizards for feature programming. Level 1 these are the most commonly assigned programs for this feature. Level 2 these are the next most commonly assigned programs for this feature. Level 3 these programs are not often assigned and require an expert level working knowledge of the UX5000 to be properly assigned. Program Number Program Name Description/Comments Assigned Data Level * = Minimum Required Programming * CCPU Network Setup Default Gateway Assign the default gateway IP address for the CCPU ~ ~ ~ (default = ) * CCPU Network Setup IP Address Set the IP Address for the VOIPDB (32, 64, 128). The IP number increases by one for each increase in the slot number ~ ~ ~ (default = ) * CCPU Network Setup Subnet Mask Define the VOIPDB Media Gateway Subnet Mask Address. The setting of Subnet Mask errors when all Host Addresses are

13 UX5000 PVAU NAT Traversal Issue 2.0 Program Number Program Name Description/Comments Assigned Data Level (cont.) (default = ) CCPU Network Setup NIC Setup Define the LAN interface Speed and Mode of the VoIP Application supported. 0 = Auto Detect 1 = 100 Mbps, Full Duplex 2 = 100 Mbps, Half Duplex 3 = 10 Mbps, Full Duplex 4 = 10 Mbps, Half Duplex 5 = 1 Gbps, Full Duplex 6 = 1 Gbps, Half Duplex (default = 0) VoIP DSP Resource Selection Select type of VOIPDB DSP Resource. This program setting has no affect on the terminal/trunk port assignment or usage. Select type of VOIPDB DSP Resource. This program setting has no affect on the terminal/trunk port assignment or usage * LAN Setup for External Equipment TCP Port Define the TCP port number for the LAN CTI and O&M communication between the CCPU and the Desktop Applications. 0~65535 default: External Device 1 (CTI Server) = 0 External Device 2 (ACD MIS) = 4000 External Device 5 (SMDR Output) = 0 External Device 6 (DIM Output) = 0 External Device 11 (O&M Server) = 8010 External Device 12 (Traffic Report Output) = 0 External Device 13 (Room Data Output for Hotel Service ) = * IP System Operation Setup Disable the Peer-to-Peer feature for SIP MLT and SIP IP stations. 0= off 1= on (default=1) 11

14 Issue 2.0 UX5000 PVAU NAT Traversal Program Number Program Name Description/Comments Assigned Data Level UX5000 IP Terminal Server Information Setup Register Mode If set to 0, when the terminal boots up it reports the ext. assigned in the terminal or chooses the next available extension in the UX5000. No password is required. If set to 1 the SIP user name and password must be entered on the actual IP terminal. These settings must match 84-22/ , or the terminal does not come on-line. If set to 2, when the terminal boots up it prompts user to enter a user ID and password before logging in. It checks this user ID/password against 84-22/ If there is no match, the terminal does not come on-line. 0 = Normal 1 = Auto 2 = Manual (default = 0) * VOIPDB Basic Setup IP Address Assign the IP address for each DSP on the VOIPDB. xxx.xxx.xxx.xxx Defaults: Slot 1 = : Slot 4 = VoIP GW Number 1~ ~ VOIPDB Basic Setup RTP Port Number Assign the RTP port number to be used for each DSP on the VOIPDB. Only even numbered ports are supported. 0~65534 Defaults: VoIP GW1 = VoIP GW2 = VoIP GW3 = VoIP GW4 = VoIP GW5 = VoIP GW6 = VoIP GW7 = VoIP GW8 = VOIPDB Basic Setup RTCP Port Number (RTP Port Number +1) Assign the RTCP Port number to used for each DSP on the VOIPDB. 0~65534 Defaults: VoIP GW1 = VoIP GW2 = VoIP GW3 = VoIP GW4 = VoIP GW5 = Manual Slot Installation Assign the PVAU-NAT to a slot. 0 = None 1 = Router 2 = PVAU-NAT 12

15 UX5000 PVAU NAT Traversal Issue 2.0 Section 7 PVAU NAT Application Programming 1. Once the PVAU blade is installed, the PVAU NAT application allows users to access the PVAU NAT through their web browser. To access the PVA-NAT, launch your Internet Explorer 6.0 or higher and enter the default public IP address in the address link. Note: Your computer must be statically assigned on the /24 network. 2. Users will be prompted for default user name and password. Default User name: installer and password: installer. The defined IP addresses shown in the following graphics are examples only and your entries should be specific to your network environment. 7.1 PVAU NAT Login 13

16 Issue 2.0 UX5000 PVAU NAT Traversal 7.2 PVAU NAT Network Settings In this screen, the IP address for the PVA-NAT can be configured. PVAU NAT requires a static IP address on the WAN. PVAU-NAT Public IP Address 14

17 UX5000 PVAU NAT Traversal Issue SIP Server Configuration IP Address: IP address of the VOIPDB (32, 64, 128). This should match Program in UX5000 programming. Server Port Default: If you change this port in Program , then the SIP Server Port on all terminals must change. Base Port Default: This value is arbitrary but should only be changed if a conflict exists on the network. IP Address of VOIPDB IP Terminal Register Port Change if port conflict occurs 15

18 Issue 2.0 UX5000 PVAU NAT Traversal 7.4 NAPT Configuration Check Box Should be utilized if the CCPU is on the LAN side of NAT router and the PVA-NAT is on the WAN. Set port forwarding for all the RTP ports utilized by the VOIPDB (32, 64, 128) in Program Port forwarding on the NAPT router must reflect Program settings. Also set the SIP port in Program to be forwarded by the router (default 5080). VOIPDB 32 open UDP ports ~ VOIPDB 64 open UDP ports ~ VOIPDB 128 open UDP ports ~10275 WAN IP Address of NAT Router = Check if the UX5000 is in the LAN 16

19 UX5000 PVAU NAT Traversal Issue CTI Proxy Configuration This setting is used for supporting the UX Softphone over NAT. With this enabled, a VPN connection is no longer needed. Define the port number for Desktop Suite (refer to Program , Device 9) 17

20 Issue 2.0 UX5000 PVAU NAT Traversal 7.6 User Configuration Here you can add, edit, or delete user login credentials for accessing the PVAU NAT configuration web interface. 18

21 UX5000 PVAU NAT Traversal Issue Logout After making changes to the PVAU NAT blade, press the logout button to exit out of programming. 19

22 Issue 2.0 UX5000 PVAU NAT Traversal 7.8 Blade Reset The PVAU NAT blade may be reset via GUI or pressing the reset button on the PVAU blade. Any network address configuration changes for the PVAU NAT will prompt users to reset the PVAU NAT application. The PVAU NAT blade may be reset via GUI or by pressing the reset button on the PVAU. Any network address configuration changes for the PVAU NAT will prompt users to reset the PVAU NAT application. 20

23 UX5000 PVAU NAT Traversal Issue Required IP Terminal Setting LAN IP Terminal SIP Setting -> Server Address and URI -> 1 st ~ 4 th Server Address - Enter the PVAU-NAT public IP address ( ) SIP Setting -> SIP Server Port -> 1 st ~ 4 th Server Port - Enter the port number (ex: 5080) 7.10 Router Setting (Remote) No setting is required. If the operation does not work, set the port forwarding: 5060 (SIP Signaling) to IP terminal 3462 (RTP Stream) to IP terminal 7.11 NAT Router Setting (System) Port Forwarding - Refer the following ports to the VOIPDB IP address (Program ) 5080 (SIP Signal) to VOIPDB (Program ) 5081 (SIP Signal) to VOIPDB (Program ) RTP Stream (refer to Program 84-26) ~10051 to GW1 address ~10083 to GW2 address, etc (for UX Softphone) to VOIPDB (Program ) 21

24 Issue 2.0 UX5000 PVAU NAT Traversal Project PVAU NAT isip (SIP MLT / UX Softphone) Yes Standard SIP (3 rd Party) No Public IP Address Required PVAU Requires UX5000 can reside at a local area network Yes NAPT Router Configuration (near a UX5000) Yes NAP Router Configuration (near IP terminals) No (Plug & Play) Encryption No P2P Conditional Feature using Multicast (MOH/BGM/Paging) MOH: Under Investigation BGM: No Paging: Unicast Capacity Limit 32/PVAU Plug-and-Play at the remote location no configuration needed at the NAT router At the remote location no configuration needed at the NAT router Host Firewall Configuration One time configuration at the host location (UX5000 location) for Port Forwarding. UX5000 CCPU is not exposed to internet threats. 22

25 NEC Unified Solutions, Inc. 4 Forest Parkway Shelton, CT Important Telephone Numbers Sales Support and General Information Technical Service Current Products (For NEC Authorized and Certified Installers Only) Current Products After Hours (Emergencies Only) Discontinued Products Customer Service Technical Training UX5000 PVAU NAT Traversal Manual Contact Information

26 NEC Unified Solutions, Inc. 4 Forest Parkway Shelton, CT (See inside back cover for contact information.) ( ) June 26, 2009, Rev 2 Printed in U.S.A.