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Terms of Reference (TOR) General

TeleYemens International Gateway is located in Sanaa, Ghuraff Complex. It provides

access to Internet via Flag and Regional terrestrial cables linking Yemen with Saudi Arabia and Djibouti in additional to Satellite links. The attached diagram shows the layout of TeleYemen gateway.

The new VSAT Service Hub (Antenna, hub equipment, NMS etc.) requested for in this RFP will be located in the same existing TeleYemens international gateway in Ghuraff.

The bandwidth requirement will be provided by TeleYemen through satellite providers. Leased bandwidth will be in a dedicated full duplex or sharable basis as per customers requirements.

SYSTEM SPECIFICATIONS VSAT GATEWAY The following picture provides expected technical overview of the requirement.

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The following chapters provide detail requirements on the hub specifications to be proposed.

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Network The following network parameters shall be taken into consideration

Item No. Parameter Description

1 Band of operation Baseband

Ku-band, C-band and must support any other operation band without interrupting the HUB network. L-band

2 Terminals to be supported:

Initial terminals: Expanded terminals:

Over 200 500 over 4 years

3 Topology 95% STAR 5% MESH

4 Services Web Browsing, Email, VoIP, Video conferencing, FTP etc.

5 Network management

The Network should be managed by a Network Management System (NMS). The NMS should enable remote management of the terminals. The NMS should be SNMP compatible. Offered network management system should carry out the functions such as terminal validation and monitoring, allocation of resources to terminals, network configuration & control, frequency management, network monitoring & logging of events, data base (MIB) generation, over the air software upgrades etc.

6 Uplink power control and rain fade countermeasures Required in forward & return links

8 TCP Acceleration The Network should support TCP acceleration on both in and out routes 9 Quality of Service The Network should support Group QoS.

11 Link availability (Rain Fade) > 99.4%

12 Link availability (Equipment) > 99.7%

13 No. of carriers 1 out-route carrier Up to 4 in-routes carriers

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VSAT Gateway Proposed VSAT Gateway contents can be as follows; Item No. Parameter Description

Forward Channel Link (Outbound)

1 Air interface DVB-SSupplier should propose migration capability to DVB-S2 within 1 year at minimal additional hardware to the VSAT gateway.

2 Multi-satellite Multiple satellite/beam operation (up to 5 satellites) should be supported.

3 Modulation As per DVB-S and DVB-S2 specificationsQPSK and 8-PSK capability4 Information rate Must support outbound sizes from 64 kpbs to 45 Mbps.

5 FEC As per DVB-S and DVB-S2 and specifications Rates shall be specified by the BidderReturn channel link (Inbounds)

6 Air interface MF-TDMA

7 Multiple access Hub should be equipped to receive and demodulate at up to four (4) MF-TDMA carriers. The Supplier should define how many carriers can be simultaneously demodulated by the hub architecture.

8 Modulation Should be specified by the Bidder The system should support at least QPSK/8PSK 9 Information rate Up to 2 Mbps per inbound carrier

9 FEC Turbo Product codingRates should be specified by the Bidder 10 Protocols supported IP (end to end).

Miscellaneous

11 Required BER 10-8

12 SCPC option As an option, it should be possible to operate SCPC links using the VSAT Gateway

13 Operating conditions Operating temperature: +100C to +400C

Humidity: 95% (non-condensing) 14 Power Specifications 220 + 10 % V, 47-52 Hz

15 Additional IP features

MTU Auto Discovery Integrated with TCP Acceleration provides seamless network performance Diffserv and ToS Support for end-to-end QoS No restriction on IP Address assignment Public and Private IP supported Multicast Support IGMP Access Control List By Remote By Direction Dynamic Routing Over-the-air, controlled per segment (Remote-LAN, over-satellite, Hub-WAN) Static Routes By Remote, By Direction Local DNS Caching TCP and HTTP Acceleration In Both Directions

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Terminals (Existing Terminals) Remote Terminals will be provided by TeleYemen. Currently TeleYemen operates iDirect 3000, IDirect 5000 Series, Comtech CDM570-L and, Comtech CDM625-L terminals. The proposed VSAT Gateway shall enable compatibility with these terminals, however for SCPC customers; SCPC Line cards should be used. The outdoor units of each remote station are composed of:

1.2m standard Ku-band (14.0-14.5GHz) antenna 3W standard Ku-band (14.0-14.5 GHz) Block Up-converter (BUC) Ku-band (10.95-11.7 GHz) Low-Noise Block Down-converter (LNB)

The Bidder should propose equipment sizing at the hub station compatible with these outdoor units and the specifications above. Network Management and Trouble Ticket System

The Bidder should propose a Global Network Management System (NMS) to allow TeleYemen to have the full control over the Network and its components.

The Global NMS should take care of the following aspects of the network: Fault Recognition and Reporting Performance Monitoring

The Global NMS should operate in cooperation with the VSAT Gateway NMS and the

Trouble ticketing System.

TeleYemen should have the ability to perform systems status, health and performance monitoring and alert the responsible Technician on Duty in case of problems. The Global NMS should enable TeleYemen to manage all faults or performance issues on the services provided.

The Global NMS should enable TeleYemen to log problems with the provided services and maintain a fault management audit trail of all activities until service restoration.

The Bidder should also propose a suitable Trouble Ticket System where communication with users and customers is made easy. It should support the following features and standards:

Multi Language Support Multi Operator Support Telephone, web and e-mail support

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Fully web based Ticket and Communication Tracking Different Types of Escalation Levels 1st and 2nd level Support Ticket Priority Levels : Level 1 (low) Level 5 (very high) Ticket Queuing Customer FAQ

SYSTEM SPECIFICATIONS RF infrastructure Antenna System

The Bidder should propose an antenna system adequately compatible with the remote terminal equipment as defined in the above sections of the present document.

Preliminary Link Budgets have been conducted based on the capacity described earlier in this document and it is anticipated that the following antenna shall be required.

The Bidder should quote for the antenna as described below but may propose a different system and provide appropriate justifications based on Link Budget calculations. The Bidder should quote for the following systems:

Antenna 4.5m-Ku linear, limited motion antenna system which includes: o Motorized Actuators and Screw Jacks in AZ/EL o Kingpost pedestal Mount o Foundation Kit (Galvanized) o Hub Closeout o Providing 65 degree Continuous Azimuth travel, 5-90 degree Continuous

elevation travel. o Feed Interface to Diplexers port, 1RX and 1TX WR-75

TX 13.7514.5 GHz RX 10.9512.75 GHz

o O&M Manual o Lightning arrestor o Export packing

Antenna 4.5m-C linear, limited motion antenna system which includes:

o Motorized Actuators and Screw Jacks in AZ/EL o Kingpost pedestal Mount o Foundation Kit (Galvanized) o Hub Closeout o Providing 65 degree Continuous Azimuth travel, 5-90 degree Continuous

elevation travel. o Feed Interface to Diplexers port, 1RX and 1TX WR-75

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TX 5.8506.425 GHz RX 3.6254.200 GHz

o O&M Manual o Lightning arrestor o Export packing

Antenna Pointing Controller o Three axis control(AZ, EL & Pol) o Single -Speed Power Drive Unit(PDU) o Azimuth Drive Rates 0.02/s0.04/s o Elevation Drive Rates 0.02/s0.04/s o Polarized Drive Rates 0.02/s0.1/s o 8 programmable target positions o 0.02 degree resolution position display o Accuracy Servo System 1/10 Beam width o Mounting Limit Switches o Malfunction Alarm o Cabling between Controller and Electromotor (30.5 m standard) o O&M Manual

L-Band Tracking Receiver for each antenna. Up Converter System The Bidder should quote the following up-converter system. Due to rack space restrictions, the Bidder should offer a fully redundant 1:1 system fitting in 1 RU (19 rack standard). Each redundant up conversion should be modular and hot swappable.

L-Band to Ku-Band Dual 1+1 Up-converter o 1U Rack mount Unit o Input Frequency L-Band 950-1700 MHz o Output Frequency Ku-Band 14.00-14.50 GHz o Spectrum Non-Inversion o Spurious -55dBc carrier related @ -10dBm o Conversion Gain 20dB @ max gain setting o Gain Adjustment 20dB o Input Connector BNC (f) 50 o Output Connector Type-N (f) 50 o Microprocessor Based M&C o Voltage 90-265 VAC o 1:1 Redundant Ready (Hot swappable card feature)

Rack mount set of slides (pair)

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L-Band to C-Band Dual 1+1 Up-converter

o 1U Rack mount Unit o Input Frequency L-Band 950-1700 MHz o Output Frequency C-Band 3.6254.200 GHz o Spectrum Non-Inversion o Spurious -55dBc carrier related @ -10dBm o Conversion Gain 20dB @ max gain setting o Gain Adjustment 20dB o Input Connector BNC (f) 50 o Output Connector Type-N (f) 50 o Microprocessor Based M&C o Voltage 90-265 VAC o 1:1 Redundant Ready (Hot swappable card feature)

Rack mount set of slides (pair)

Power Amplifier System

The Bidder should propose a Solid-State Power Amplifier (SSPA) system adequately compatible with the remote terminal equipment as defined in the above sections of the present document. Preliminary Link Budgets have been conducted based on the capacity described earlier in this document and it is anticipated that the following SSPA should be required. The Bidder should quote for the SSPA as described below but may propose a different system and provide appropriate justifications based on Link Budget calculations. The Bidder should quote for the following system

100W Standard Ku-Band Solid State Amplifier (2 units in 1:1 redundant configuration) o Hub mount installation o Transmit frequency range 14.00-14.50 GHz o Output Power @ P1dB +49dBm o Output Power @ Psat +50dBm o Gain Adjustment Range 20dB in 0.1 dB steps o Input Connector N-Type (f) o Output Connector WR75 Waveguide o Power 110/220 VAC o Redundant ready configuration

100W Standard C-Band Solid State Amplifier (2 units in 1:1 redundant configuration)

o Hub mount installation o Transmit frequency range 3.6254.200 GHz o Output Power @ P1dB +49dBm

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o Output Power @ Psat +50dBm o Gain Adjustment Range 20dB in 0.1 dB steps o Input Connector N-Type (f) o Output Connector WR75 Waveguide o Power 110/220 VAC o Redundant ready configuration

Redundancy Switching and Control Unit including all necessary waveguides, cables and connectors to enable 1:1 redundancy

Remote Monitoring and Control Panel for 1:1 system (indoor rackable) Mounting frame for outdoor installation

Low Noise Amplifier System The Bidder should quote the following Low-Noise Amplifier (LNA) system. The Bidder should propose a 1:1 redundant LNA architecture, including all redundancy switching and control. The Bidder should quote a suitable system with the following characteristics.

Ku-band Low Noise Amplifier dual redundant configuration o Input / Output Frequency Ku-Band 10.95-12.75 GHz o Transient Protection o GaAs FET/HEMT o Pressurizable Waveguide input o Gain 60 dB through Redundancy Switch panel o Noise Temperature: max. 85K o Output power at P1dB : +10dBm o Input Connector : WR-75 Flange o Output Connector : N-type (F) o Voltage +12 to +24 VDC o 1:1 Redundant configuration

C-band Low Noise Amplifier dual redundant configuration

o Input / Output Frequency C-Band 3.6254.200 GHz o Transient Protection o GaAs FET/HEMT o Pressurizable Waveguide input o Gain 60 dB through Redundancy Switch panel o Noise Temperature: max. 85K o Output power at P1dB : +10dBm o Input Connector : WR-75 Flange o Output Connector : N-type (F) o Voltage +12 to +24 VDC

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o 1:1 Redundant configuration Down Converter System The Bidder should quote the following down-converter system. Due to rack space restrictions, the Bidder shall offer a fully redundant 1:1 system fitting in 1 RU (19 rack standard). Each redundant up conversion should be modular and hot swappable.

ARDD-K1LR Ku-Band to L-Band Dual 1+1 Down-converter o 1 U Rackmount Unit o Input Frequency Ku-Band 10.95-11.70 GHz o Output Frequency L-Band 950-1450 MHz o Spectrum Non-Inversion o Spurious -55dBc carrier related @ -10dBm o Conversion Gain 20dB @ max gain setting o Gain Adjustment 20dB o Input Connector Type-N (f) 50 o Output Connector BNC (f) 50 o Microprocessor Based M&C o Voltage 90-265 VAC o 1:1 Redundant Ready (Hot swappable card feature)

Rack mount set of slides (pair)

ARDD-K1LR C-Band to L-Band Dual 1+1 Down-converter o 1 U Rackmount Unit o Input Frequency Ku-Band 3.6254.200 GHz o Output Frequency L-Band 950-1450 MHz o Spectrum Non-Inversion o Spurious -55dBc carrier related @ -10dBm o Conversion Gain 20dB @ max gain setting o Gain Adjustment 20dB o Input Connector Type-N (f) 50 o Output Connector BNC (f) 50 o Microprocessor Based M&C o Voltage 90-265 VAC o 1:1 Redundant Ready (Hot swappable card feature)

Rack mount set of slides (pair) Cables, Connectors and ancillary RF equipment

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The Bidder should include Inter-facility link (IFL) cables and connectors for cabling between indoor and outdoor units at the hub station. The distance between antenna and rack room will be a maximum of 30 meters. The Bidder should also deliver all necessary waveguides to connect the SSPA to the antenna feed. The Bidder should deliver a set of Tools and instruments dedicated to the configuration of the Project to enable TeleYemen to conduct troubleshooting. The Bidder may propose additional RF equipment to the one specified for TeleYemens consideration. Applications Voice over Internet Protocol (VoIP)

The network should provide VoIP telephony at all the terminals. The VoIP service should provide Toll quality G.729 Voice (ITU Standard) meeting stipulated QoS requirements. The network will initially cater to network bandwidth requirement of 20 full-duplex simultaneous satellite voice circuits (1 x E1) to serve the network voice communications requirements.

The network should implement bandwidth on demand capacity assignments in the return (terminal to hub) direction based on the signalling exchanged between the hub station VoIP Gateway and the terminal VoIP equipment. This signalling should be either SIP or H.323 version 4. The network should simultaneously support terminals using SIP-based VoIP equipment or terminals using H.323-based VoIP equipment.

The network should support Quality of Service provisions to ensure VoIP traffic is assigned the highest priority over other forms of traffic. The network should have the means to set limits on the number of simultaneous VoIP circuits supported by the terminal, by a group of terminals and by the network.

The network should support Voice Activity Detection (VAD) and Comfort Noise Generation (CNG). The terminals shall automatically redirect unused VoIP capacity to lower priority traffic during VAD-identified pauses in the VoIP traffic during a call session. The reassignment of unused VoIP capacity during a session shall take place in either direction. Comfort Noise Generation shall be provided to the user during pauses in the VoIP traffic. There should be a VoIP Gateway located at the hub station.

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The VoIP Gateway at the hub station should be connected to the 10/100 Base-T IP network of the satellite communications system to the Public Switched Telephone Network (PSTN) in Yemen. There shall be one (1) E1 interfaces to the PSTN serving the total 20 full-duplex simultaneous satellite VoIP channels. The VoIP Gateway shall support the following VoIP protocols:

SIP H.323 Version 4

Audio Codecs:

G.729a (8 kbps) The VoIP Gateway shall support the following signalling schemes:

ETSI ISDN The VoIP Gateway shall support the following call quality features:

Adaptive jitter removal Comfort Noise Generation (CNG) Silence suppression (VAD) Differentiated Services (DiffServ) Echo cancellation (G.168 up to 128ms)

The ATA shall support the following Satellite IP network interface:

10/100 Base T The following voice compression standards shall be supported:

G.729 The following signalling types shall be supported on the IP side

SIP H.323 Version 4

Fax The system should support Group 3 fax with T.38. Video Conferencing The network should support video conference traffic at all the terminals. The network will initially cater to network bandwidth requirement of ten (10) full-duplex simultaneous satellite video conference circuits to serve the network video communications requirements.

The video conference equipment shall provide service over an IP-based network.

The network should implement bandwidth on demand capacity assignments in the return (terminal to hub) direction based on the signalling exchanged between the hub station video conference equipment and the terminal video conference equipment. This signalling shall be

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either SIP or H.323 version 4. The network should support terminals using SIP-based video conference equipment or terminals using H.323-based video conference equipment.

The network shall support Quality of Service provisions to ensure video conference traffic is assigned the highest priority over other forms of traffic. The network should have the means to set limits on the number of simultaneous video conference circuits supported by the terminal, by a group of terminals and by the network.

Data The network should support Data traffic at all the terminals. The following protocols shall be supported:

IP, UDP, TCP, Unicast, Multicast, Broadcast, FTP, HTTP, SNMP, ICMP, IGMP, DHCP (local server), RTP, PEP (TCP, HTTP, Compression), IPSec/ VPN, VLAN

Professional services Design and Preparation Services

The Bidder should propose a Design Programme including all necessary site surveys, where applicable, as well as provision of all design documentation to TeleYemen. Such documentation may include: Operating Manuals for Equipment Operating Manuals for Software Systems such as NMS Production Test Results for Equipment Interface Control document for VSAT Gateway Technical drawings of all Equipment Installation and Troubleshooting procedures Project implementation schedule and milestones Others on request

The successful Bidder (Contractor) shall be mandated for a Site Survey at TeleYemen

premises in Sanaa.

TeleYemen is responsible for all civil works relating to installation of outdoor hardware at the TeleYemen teleport in Sanaa. Such civil works should be conducted in accordance with the Site Survey Report provided by the Contractor after contract signature and initiation of the Project.

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Implementation Services The Bidder should propose a complete implementation of the hub station including but not limited to: Interconnection to the IP backbone (with support from TeleYemen) Antenna erection and pointing Site Commissioning Frequency allocation and coordination Cross-polarisation testing Validation testing of each item and complete system Other activities on request

Operational and Training Services The Bidder should provide Training on all delivered systems, including: VSAT Gateway and NMS RF infrastructure Global NMS Trouble Ticket System Other systems to be proposed by the Bidder

It is preferable that all training should be conducted concurrently across a period of a

maximum of 12 working days.

The training shall include on-site training (during the commissioning) for up to ten (10) technicians. The content of training and training material shall be given to the participants should be clearly explained.

The Bidder may propose additional Operational Training services such as Practice Troubleshooting sessions (drills) if deemed necessary.

The Bidder should propose on-call remote support with 24/7 helpline for a minimum period of 6 months after network commissioning for all installed infrastructure. Legal Interception System

As the legal interception system requirement is a third party requirement and not in the hands of TeleYemen, it difficult for TeleYemen do provide bidder with initial expected specifications. However, according to initial requirements mentioned in Section-1 (Summary of project requirements), bidders can assume a suitable system specifications that will fulfil the Yemen authorities requirements and for TeleYemen to borne its cost. It is also expected that, system will support redundancy facilities. Support and Maintenance Services

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The Bidder may propose a support contract (including spares storage and technical support as a minimum) for a period of 5 years for the network. In such case, the maintenance and repair philosophy during warranty and maintenance contract period shall be clearly indicated. Existing TeleYemens International Telecoms Gateways

M

U

X

ISC2

RegionalLL

ISC3

NGN

CSMS

PSTN

DataNetwork

Internet

CS/IVR

INPlatform

Mobileoperators

SEAMEWE

FLAG

AOR

IOR

A/SAT

E/Ss

NOC

ExistingTeleYemenInternationalTelecomsGateways