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D13192
User Manual
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TANDBERG D13192 User Manual

Technical Description of
TANDBERG Gateway
with software version G2
TANDBERG
D13192 Rev. 02
Technical Description of TANDBERG Gateway with software version G2
Table of contents
1 INTRODUCTION ............................................................................................................................................ 4
2 PRODUCT DESCRIPTION............................................................................................................................ 5
2.1 SOFTWARE...................................................................................................................................................... 5
3 OPERATION AND USER INTERFACE ...................................................................................................... 5
4 TANDBERG GATEWAY INTERFACES & FEATURES........................................................................... 6
4.1 NETWORK INTERFACES AND FEATURES.......................................................................................................... 6
4.1.1 Multiple Calls ........................................................................................................................................... 6
4.1.2 PRI E1/T1 ISDN ....................................................................................................................................... 7
4.1.2.1 ISDN number plan........................................................................................................................................... 7
4.1.2.2 PRI Trunk Grouping........................................................................................................................................ 7
4.1.2.3 PRI E1/T1 ISDN.............................................................................................................................................. 7
4.1.3 Dial In Services......................................................................................................................................... 9
4.1.3.1 Direct Inwards Dialing (DID).......................................................................................................................... 9
4.1.3.2 Interactive Voice Response (IVR) ................................................................................................................... 9
4.1.3.3 TCS-4 .............................................................................................................................................................. 9
4.1.3.4 Hotline........................................................................................................................................................... 10
4.1.4 IP Dial Out Services ............................................................................................................................... 10
4.1.4.1 Service Prefixes ............................................................................................................................................. 10
4.1.5 Ethernet / LAN Interface (H.323) ........................................................................................................... 10
4.1.5.1 Quality of Service features (QoS).................................................................................................................. 10
4.1.5.2 IP adaptive bandwidth management .............................................................................................................. 11
4.1.5.3 Dynamic playout buffering ............................................................................................................................ 12
4.1.5.4 Asymmetrical media capabilities ................................................................................................................... 12
4.1.5.5 Diagnostic tools for IP ................................................................................................................................... 12
4.1.5.6 Latency & Jitter ............................................................................................................................................. 12
4.1.5.7 Layer 4 Ports used in H.323 .......................................................................................................................... 13
4.1.5.8 IP packet sizes ............................................................................................................................................... 13
4.1.5.9 Intelligent Packet Loss Recovery (IPLR)....................................................................................................... 14
4.1.6 LEDs Description ................................................................................................................................... 15
4.1.6.1 Description of PRI Alarms............................................................................................................................. 15
4.1.7 Intelligent Call Management (ICM) ....................................................................................................... 16
4.1.8 TANDBERG Gateway Capacity.............................................................................................................. 17
4.1.8.1 TANDBERG Gateway Capacity – typical scenarios for 4Mb Option ........................................................... 18
4.1.9 Secure Conference (Encryption)............................................................................................................. 18
4.1.10 H.243 Multipoint Transparency......................................................................................................... 19
4.2 AGGREGATION STANDARDS.......................................................................................................................... 20
4.2.1 BONDING............................................................................................................................................... 20
4.2.1.1 ISDN channel set-up...................................................................................................................................... 20
4.2.2 H.221 ...................................................................................................................................................... 20
4.2.3 H0 ........................................................................................................................................................... 20
4.3 RS232 INTERFACE/APPLICATION PROGRAMMABLE INTERFACE (API) ......................................................... 21
4.3.1 API commands........................................................................................................................................ 21
4.4 VIDEO FEATURES ......................................................................................................................................... 22
4.4.1 Optimised Video Compression................................................................................................................ 22
4.4.2 Video Formats ........................................................................................................................................ 22
4.4.3 Asymmetric Video Formats..................................................................................................................... 22
4.4.4 Duo Video ............................................................................................................................................... 23
4.4.5 Custom pictures ...................................................................................................................................... 23
4.5 AUDIO FEATURES ......................................................................................................................................... 24
4.5.1 Custom Sounds........................................................................................................................................ 24
Technical Description of TANDBERG Gateway with software version G2
4.5.2 Telephony................................................................................................................................................ 24
4.5.3 Audio Compression Algorithms .............................................................................................................. 24
4.6 SYSTEM MANAGEMENT ................................................................................................................................25
4.6.1 Ethernet/LAN Interface........................................................................................................................... 25
4.6.2 Platform Requirements ........................................................................................................................... 25
4.6.3 Protocols Supported ............................................................................................................................... 26
4.6.4 System Management Functionality......................................................................................................... 27
4.6.4.1 Remote software upgrades using FTP: .......................................................................................................... 27
4.6.4.2 Management using a standard Web-browser: ................................................................................................ 27
4.6.4.3 Management using a standard Telnet-client: ................................................................................................. 27
4.6.4.4 Management using a terminal connected to the RS232 port:......................................................................... 27
4.6.5 Security ................................................................................................................................................... 27
4.6.5.1 HTTPS, TLS/SSL .......................................................................................................................................... 27
4.6.5.2 Telnet Challenge Service ............................................................................................................................... 28
4.6.5.3 Disable Services............................................................................................................................................. 29
4.6.5.4 Security Alert................................................................................................................................................. 29
4.6.6 Layer 4 ports used by the system ............................................................................................................ 30
5 MISCELLANEOUS FEATURES ................................................................................................................. 31
5.1 PHONE BOOK ................................................................................................................................................ 31
5.2 FILE SYSTEM (FTP) ...................................................................................................................................... 31
5.2.1 Picture files ............................................................................................................................................. 31
5.2.2 Sound files............................................................................................................................................... 31
5.2.3 Other files ............................................................................................................................................... 31
6 ENVIRONMENTAL ISSUES ....................................................................................................................... 33
6.1 TANDBERG’S ENVIRONMENTAL POLICY ................................................................................................... 33
6.2 ENVIRONMENTAL CONSIDERATIONS............................................................................................................. 33
7 PRODUCT APPROVALS ............................................................................................................................. 34
7.1 CONNECTION OF TELE-TERMINAL EQUIPMENT............................................................................................. 34
7.2 EMC EMISSION - RADIATED ELECTROMAGNETIC INTERFERENCE ................................................................ 34
7.3 EMC IMMUNITY........................................................................................................................................... 34
7.4 ELECTRICAL SAFETY .................................................................................................................................... 34
7.5 EMC IMMUNITY........................................................................................................................................... 34
7.6 NEBS APPROVAL ......................................................................................................................................... 35
8 PRODUCT RELIABILITY ........................................................................................................................... 36
9 TECHNICAL SPECIFICATION OF TANDBERG GATEWAY.............................................................. 37
9.1 MECHANICAL INFORMATION......................................................................................................................... 37
9.2 PACKAGING .................................................................................................................................................. 37
9.3 OPERATING TEMPERATURE AND HUMIDITY ................................................................................................. 38
9.4 STORAGE AND TRANSPORT TEMPERATURE.................................................................................................. 38
9.5 SYSTEM POWER CONSUMPTION.................................................................................................................... 38
10 TECHNICAL SPECIFICATION SHEET ...................................................................................................39
Technical Description of TANDBERG Gateway with software version G2
1 Introduction
The TANDBERG Gateway is designed to connect up to 8 videoconferencing calls and 8 telephone calls simultaneously between ISDN and IP Networks.
The TANDBERG Gateway supports the ITU-T H.320 standard and a combination of H.221 and BONDING for communication on up to 30 ISDN B-channels as well as ITU-T H.323 v.4 standard for communication up to 2 Mbps over IP networks.
The TANDBERG Gateway is ‘configurationless’ in the sense that no extensive knowledge is required for installation and maintenance. All features are included in the TANDBERG Gateway – thus, there is no additional hardware required to use any of the inbuilt features.
All features of the TANDBERG Gateway are based on standards set by the ITU-T.
The TANDBERG Gateway is best utilised when used together with TANDBERG Management Suite (TMS) and TANDBERG Scheduler, since they have incorporated features like System Management and Scheduling (Optional).
Major features supported:
• Up to eight separate video and eight separate telephone calls
• Maximum bandwidth for all calls combined is 7680 kbps
• Flexible ISDN Dial-in Services
• Flexible IP Dial-out Services
• Call Transfer
• IP QoS Features
• H.243 Transparency
• H.264 Video Standard
• Custom video formats (e.g. XGA video resolution)
• Full implementation of Downspeeding
• Secure Conference (AES/DES Encryption)
Technical Description of TANDBERG Gateway with software version G2
• Dual Stream - supports Duo VideoTF on ISDN and IP, and People+Content on ISDN.
• Secure Access - Supports XML/SOAP over HTTPS
• Support for TANDBERG Scheduler and TANDBERG Management Suite - (Optional)
• ISDN Hotline
• Terminal Control Session (TCS-4)
• Interactive Voice Response (IVR)
• Direct Inward Dialing (DID)
2 Product Description
The TANDBERG Gateway is built on a standard 19-inch rack mounted chassis of only 1U in height.
2.1 Software
In the standard version, the TANDBERG Gateway supports up to 2 Mbps bandwidth on ISDN. With the bandwidth option installed, it can handle up to 4 Mbps bandwidth on ISDN.
3 Operation and User Interface
The TANDBERG Gateway is normally controlled via the web interface. The TANDBERG Gateway can also be controlled via Telnet (or the RS232 port) by using a comprehensive set of API commands interface, such as an AMX or Crestron system.
For information on how to operate the system, please see the documents TANDBERG Gateway User Manual or TANDBERG Gateway API supplied with the system.
1
Please, refer to document ‘
1
. This enables the TANDBERG Gateway to be controlled by a different user
TANDBERG Gateway API’ (D13202)
Technical Description of TANDBERG Gateway with software version G2
4 TANDBERG Gateway Interfaces & Features
Extensive use of industry standard interfaces and connectors ensure effortless integration of external equipment with the TANDBERG Gateway. These interfaces can easily be controlled via the web user interface.
4.1 Network Interfaces and Features
Network Interfaces 4 x PRI (RJ-45 Jack) Primary Rate (G.703) Interfaces
2 x Ethernet (RJ-45 Jack) LAN interfaces (10/100 Mb)2
• 4 x PRI (RJ-45 jack) Primary Rate (G.703) interface for transmission speeds from 112 kbps up to 2 Mbps (1.5 Mbps PRI/T1).
• 2 x Ethernet (RJ-45 jack) Local Area Network interface (10/100Mb) for transmission speeds up to 2 Mbps
4.1.1 Multiple Calls
The TANDBERG Gateway may run 8 separate simultaneous videocalls and 8 phone calls. Please refer to the Capacity section for more information on available resources.
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.
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Only Ethernet port no. 1 is used in software version G2.
Technical Description of TANDBERG Gateway with software version G2
4.1.2 PRI E1/T1 ISDN
4.1.2.1 ISDN number plan
The TANDBERG Gateway’s PRI lines may use one or more numbers for dial in. If more than one number is used, the numbers must be consecutive.
4.1.2.2 PRI Trunk Grouping
When using more than one PRI line, the same properties for PRI 1 can be used for all PRI's by defining them all as a trunk group.
4.1.2.3 PRI E1/T1 ISDN
The PRI interface may require an external CSU depending on the network layout. ‘Cable Length’ in the PRI set-up menu specifies the distance from the TANDBERG Gateway to the CSU or last repeater.
A CSU is not required if the system is within 200 m (655 ft) of the last repeater.
The TANDBERG Gateway supports the PRI protocols AT&T Custom, National ISDN and ETSI (Euro ISDN). The AT&T and National protocols will give a total of (23*4) = 92 channels while the ETSI protocol will give a total of (30*4) = 120 channels.
Within these protocols the following switches are supported:
Switches
Protocols supported 4ESS (AT&T) AT&T Custom 5ESS (AT&T) AT&T Custom and National ISDN
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DMS250 (Nortel) National ISDN DMS100 (Nortel) National ISDN (Any switch) ETSI (Euro ISDN)
Channel hunting is provided for outgoing calls. This feature is normally used when the number of channels needs to be specified. When no value is specified for low or high channel, they default to 1 (low), 23 (high US) and 30 (high Europe). Default search is from high to low.
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Dependent on the configuration of the switch
Technical Description of TANDBERG Gateway with software version G2
Pinout of PRI E1/T1 Interface:4
PRI Pinout
1 TIP RX 2 RING RX 4 RING TX 5 TIP TX
NOTE: TANDBERG recommends always using category 5 cabling.
PRI T1 (US only):
Network Service Facility (NSF) can be configured as blank/no value (i.e. NSF not used – default) or any value between 0 and 31, to describe the service facility on the PRI/T1 line.
AT&T Service code (ref.1) Service
0 Disable 1 SDN (Including GSDN) 2 Toll Free Megacom (800) 3 Megacom 6 ACCUNET Switched Digital Service (incl. Switched Digital International) 7 Long Distance Service (incl. AT&T World Connect) 8 International Toll Free Service (1800) 16 AT&T MultiQuest 23 Call Redirection Service
Sprint Service code (ref.2) Service
MCI
Service code (ref.2) Service
0 Reserved 1 VNET/Vision 1 Private 2 800 2 Inwatts 3 PRISM1, PRISMII, WATS 3 Outwatts 4 900 4 FX 5 DAL 5 TieTrunk Ref. 1: AT&T TR 414859 Specification, June 1999, page 76 Ref. 2: Ascend Multiband Plus-T1/PRI, User Documentation, Page 6-8
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The cable of use should be a straight through configuration.
Technical Description of TANDBERG Gateway with software version G2
4.1.3 Dial In Services
4.1.3.1 Direct Inwards Dialing (DID)
By enabling this feature, it is possible to make a direct mapping between ISDN numbers and H323 aliases. This requires that the PRI lines connected to the TANDBERG Gateway are configured with a range of numbers. This range of numbers should be large enough to associate one ISDN number to each H.323 device that is intended to make use of the DID feature.
The H.323 aliases must be a portion of the ISDN number plus a prefix.
Example:
The TANDBERG Gateway is configured to use 4 digits of the ISDN Number, and 9 as the H.323 prefix:
An endpoint dials the ISDN number 67117780 The TANDBERG Gateway transfers the call to the H.323 Alias 97780
4.1.3.2 Interactive Voice Response (IVR)
This feature is used when one 'main' ISDN number is used for the TANDBERG Gateway. When dialing into the TANDBERG Gateway on this number, the user will be greeted with a welcome picture and sound. The user can then enter the H.323 Alias of the site they wish to call using DTMF tones.
IVR should be used when one single ISDN number is to be used for the TANDBERG Gateway and when the endpoints using H.323 should be independent of the ISDN number used for the TANDBERG Gateway.
4.1.3.3 TCS-4
TCS-4 uses the same ISDN number as IVR. The user can add the H.323 alias to the ISDN number separated by a * . The TANDBERG Gateway will automatically transfer the call to the H.323 alias.
Example:
Endpoint dials 6711111*1234 Gateway will transfer the call to the H.323 alias 1234
Technical Description of TANDBERG Gateway with software version G2
4.1.3.4 Hotline
When calling the Hotline number specified in the TANDBERG Gateway, the call is automatically transferred to a predefined H.323 alias. This feature can be used when an operator or helpdesk is needed.
All ISDN Dial In features (DID, IVR, TCS-4 and Hotline) can be used in any combination.
4.1.4 IP Dial Out Services
4.1.4.1 Service Prefixes
A Service Prefix is used when dialing from a H.323 endpoint to a ISDN endpoint. By dialling the prefix, followed by the ISDN number, the call is transferred through the gateway, to the remote site on ISDN. The service defines the type of call (telephone/video) and bandwidth for the connection.
It is possible to define up to 20 different services on the TANDBERG Gateway.
The TANDBERG Gateway have two default services:
Service Prefix ‘0’ Video call with maximum bandwidth 384kbps Service Prefix ‘1’ Telephone call
4.1.5 Ethernet / LAN Interface (H.323)
The TANDBERG Gateway has two RJ-45 jacks
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for the Ethernet interface (manual or automatic detection of 10/100Mb) and supports call rates up to 2 Mbps. The ITU-T standard H.323 v4 protocol is implemented in the TANDBERG Gateway.
The following features are specifically relevant for this network interface:
4.1.5.1 Quality of Service features (QoS)
4.1.5.1.1 IP precedence
IP precedence is a classification of packets from 0 (low priority) to 7 (high priority). The values 6 and 7 are typically reserved for congestion control. IP precedence helps a router select what kind of traffic to prioritise. By means of queue mechanisms, it can select
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Ethernet port no.2 is not used in software version G2.
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Technical Description of TANDBERG Gateway with software version G2
which packets to send first and which to throw away. Some information/traffic is time critical while other is not, and classification is used to differentiate this traffic.
One may set separate IP precedence for Signalling, Audio, Video and Data (values 1 – 7) as well as turn IP precedence off.
The auto setting uses the following values for IP precedence:
Signalling=6
Audio/Video=4
Data=3 (e.g. FECC commands)
This means that in auto, IP precedence has the value 6 (i.e. signalling value) while both audio and video value is 4; data value is 3. Setting the IP precedence value in system’s menu is actually setting the signalling value. The audio/video and data values are changed accordingly in respect to the signalling value (i.e. audio/video value = - 2; data value = - 3).
4.1.5.1.2 Diffserv
Diffserv is an extension of IP precedence, where values from 0 to 63 (63=Highest priority) can be set.
4.1.5.1.3 IP type of service (TOS)
TOS helps a router select a routing path when multiple paths are available.
Delay- tells router to minimize delay
Throughput- tells router to maximize throughput
Reliability- tells router to maximize reliability
Cost- tells router to minimized cost
Off- Turns TOS off
4.1.5.1.4 Resource-Reservation Protocol (RSVP)
RSVP is a protocol that allows the TANDBERG Gateway to request the network to reserve the bandwidth needed for the IP meeting.
4.1.5.2 IP adaptive bandwidth management
• The TANDBERG Gateway never produces more traffic than needed for better utilization of network resources. Most of the data sent in a videoconference is video data. Thus, by incorporating smart video algorithms, the codec sends no more video data than necessary. Little movement in the picture gives low bit rate; while a lot of movement gives higher bit rate.
• The TANDBERG Gateway regulates outgoing and incoming media bit rates by means of flow control signalling.
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Technical Description of TANDBERG Gateway with software version G2
An example of this is automatic adjustment of total bandwidth used when DuoVideo is opened.
4.1.5.3 Dynamic playout buffering
Shapes the incoming data for better playout and re-sequencing of packet delivered out of order. This ensures better lip sync.
4.1.5.4 Asymmetrical media capabilities
Audio and video protocols can be fully asymmetrical. E.g., the TANDBERG Gateway can send H.263 and receive H.261 at the same time.
4.1.5.5 Diagnostic tools for IP
Q.931 To show Q.931 trace during a conference you need to issue the command syslog
on. One can get traces for RAS, Q.931 and H.245 with this command. It is a
complex trace and requires an extensive knowledge in H.323 signalling to be understood.
Ping Ping is used to see if the TANDBERG Gateway is able to reach a specific IP-
address, using a mechanism in IP called ICMP. If the TANDBERG Gateway is unable to register to its gatekeeper, or if it is unable to dial a specific endpoint, one can use ping to see if there is at least an IP-route to the gatekeeper or to the endpoint.
Traceroute Traceroute does exactly that; it traces the route an IP-packet takes to reach its
destination and displays all router hops. Traceroute is very useful for seeing exactly where there is a routing-problem in the IP-network, and for checking where transport-delay is introduced.
4.1.5.6 Latency & Jitter
Latency is defined as the time between a node sending a message and receipt of the message by another node. The TANDBERG Gateway can handle any value of latency­however, the higher the latency, the longer the delay in video and audio. This may lead to conferences with undesirable delays causing participants to interrupt and speak over each other.
Jitter is defined as the variation in latency for packets sent between two nodes in the network. Where constant latency simply produces delays in audio and video, jitter can have a more adverse effect. Jitter causes packets to arrive out of order or at the wrong times, which again leads to packet loss. The TANDBERG Gateway can manage packets with jitter up to 100ms. If excessive packet loss is detected, the TANDBERG Gateway will downspeed the connection until acceptable packet loss is achieved.
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