Summary of the content on the page No. 1
Technical Description of
TANDBERG Gateway
with software version G2
TANDBERG
D13192 Rev. 02
Summary of the content on the page No. 2
Technical Description of TANDBERG Gateway with software version G2 Table of contents 1 INTRODUCTION ............................................................................................................................................ 4 2 PRODUCT DESCRIPTION............................................................................................................................ 5 2.1 SOFTWARE..........................................................................
Summary of the content on the page No. 3
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..............................................................................
Summary of the content on the page No. 4
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
Summary of the content on the page No. 5
Technical Description of TANDBERG Gateway with software version G2 TF • Dual Stream - supports Duo Video 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 mo
Summary of the content on the page No. 6
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 2 x Ethernet (RJ-45 J
Summary of the content on the page No. 7
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 ex
Summary of the content on the page No. 8
Technical Description of TANDBERG Gateway with software version G2 4 Pinout of PRI E1/T1 Interface: 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
Summary of the content on the page No. 9
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
Summary of the content on the page No. 10
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 f
Summary of the content on the page No. 11
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. FEC
Summary of the content on the page No. 12
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.
Summary of the content on the page No. 13
Technical Description of TANDBERG Gateway with software version G2 4.1.5.7 Layer 4 Ports used in H.323 The following tables describes which layer 4 ports are being used by the TANDBERG Gateway when a call is made on an H.323 network. TANDBERG Gateway meetings + Duo Video Function Port Type Gatekeeper Discovery (RAS) 1719 UDP Q.931 Call Setup 1720 TCP H.245 Range 5555—5587 TCP Video Range 2326—2837 UDP Audio Range 2326—2837 UDP Data/FECC Range 2326—2837 UDP
Summary of the content on the page No. 14
Technical Description of TANDBERG Gateway with software version G2 4.1.5.9 Intelligent Packet Loss Recovery (IPLR) IPLR is an ITU standards based packet loss compensation for H.323 that improves received video into the TANDBERG Gateway. IPLR supports all video protocols and resolutions that TANDBERG Gateway already has implemented and is compatible with all terminals. IPLR is a special algorithm developed at TANDBERG that will make efforts to reconstruct the lost pac
Summary of the content on the page No. 15
Technical Description of TANDBERG Gateway with software version G2 4.1.6 LEDs Description The TANDBERG Gateway has 24 LEDs (Light Emitting Diodes) on the front panel. Each giving various information, as shown below. 4.1.6.1 Description of PRI Alarms A PRI cable consists of four wires (2 pairs of wires): One pair for Transmit (TX) and one pair for Receive (RX) signals. Red Alarm Red alarm or Loss of signal (LOS) means that there is no signal and thus no
Summary of the content on the page No. 16
Technical Description of TANDBERG Gateway with software version G2 Scenario: TANDBERG Gateway is connected via a CSU (i.e. a NT ‘Network Termination’) as follows: TANDBERG Gateway –cableA–CSU–cableB–Network If a CSU loses framing/sync from the network (example: a bad cable B), it shall no longer send valid framing out on cable A towards the TANDBERG Gateway. Instead it transmits "Blue Alarm". Seen from the TANDBERG Gateway receiving blue alarm, this means that the n
Summary of the content on the page No. 17
Technical Description of TANDBERG Gateway with software version G2 4.1.8 TANDBERG Gateway Capacity The total capacity of the TANDBERG Gateway is defined by the following rules. I. Maximum 8 video calls and 8 telephones calls. II. Total system bandwidth (IP + ISDN) of the TANDBERG Gateway is 7680 kbps. The maximum bandwidth used for ISDN calls is depending on the number and type of PRI's installed: a) The maximum bandwidth for each ISDN E1 is 1920 kbps (30x64kbps)
Summary of the content on the page No. 18
Technical Description of TANDBERG Gateway with software version G2 4.1.8.1 TANDBERG Gateway Capacity – typical scenarios for 4Mb Option In the table below some typical capacity scenarios are listed (they can be derived by the calculation above): Bandwidth Non-encrypted Encrypted (Max. no. of video (Max. no. of video calls + telephone calls) calls) IP & E1 128 kbps 8 + 8 7 256 kbps 8 + 7 6 384 kbps 8 + 4 5 512 kbps 7 + 4 5 768 kbps 5 + 0 3 1472 kbps 2 + 8 N/A
Summary of the content on the page No. 19
Technical Description of TANDBERG Gateway with software version G2 which encrypts "the session keys". When the session are collected by the remote end, encryption of the audio, video and data channels can start. The encryption will be established automatically when both endpoints in the conference supports encryption with automatic key generation (and the conference is set up for encryption mode of operation). Encryption is supported for meetings up to 768 kbps and f
Summary of the content on the page No. 20
Technical Description of TANDBERG Gateway with software version G2 4.2 Aggregation Standards * ISDN Aggregation H.221 Frame Structure from 64 (56 ) kbps to 128 kbps * ISO 13871 BONDING, Mode 1 from 64 (56 ) kbps to 2 Mbps H0 One 384 kbps channel 4.2.1 BONDING • ISO 13871, BONDING Mode 1 for bit rates from 56 kbps up to 2 Mbps (1 to 30 channels). • The maximum relative delay difference between B-channels is 0.5 second (i.e. to compensate for different r
