"SPOT-1500" Gateway is designed to provide two-way interconnection between THURAYA GMPCS and PSTN/PLMN. On PSTN side, "SPOT-1500" interfaces PSTN via 1 E1 (G.703) channel in minimal configuration. In start-up configuration, interface towards Thuraya Space Segment provides 12 access channels serving up to 1000 users at 6 mErl Busy Hour traffic per subscriber. "SPOT-1500" Gateway supports both DSS1 or R2 signaling. Additional features of "SPOT-1500" Gateway include incoming/outgoing calls charging, user-defined change of signaling type and numbering plan, subscriber profile addition and termination, monitoring of calls set-up and routing.
 

As the number of subscribers or traffic density grows, additional "SPOT-1500" Channel (CU) and Switching units (SU) are to be installed into standard 19" rack and powered from the same power supply unit (PSU). One rack can be used to accommodate several Channel and Switching Units. PSTN interconnection capacity can be increased by incremental addition of n*E1 channels.

Call set-up procedure consists of 2 steps. When making call to PSTN/PLMN telephone number, Thuraya subscriber dials one of dedicated numbers allocated to "SPOT-1500" Gateway (step 1). The Gateway provides Thuraya subscriber with one of free 30 channels to the nearest PSTN/PLMN switch and lets dial destination number (step 2).

Similarly to mobile-originated calls set-up, PSTN/PLMN subscriber dials one of access numbers allocated to "SPOT-1500" Gateway (step 1), and the then the number of Thuraya subscriber.

Optionally, regional mobile satellite operator may negotiate purchase or lease of PSTN numbering resource from operator that provides interconnection to PSTN/PLMN switch. In this case any PSTN/PLMN subscriber will reach Thuraya subscriber by dialing just one telephone number. In this case for external world Thuraya subscriber will have two numbers:

+88216-XXX-XX-XX and PSTN number +(XXX)-XX-XXX-XX-XX. In most cases this will result in significant savings for calling party.

Basic configuration and technical features

Start-up configuration of "SPOT-1500" Gateway (1 CU) includes:

• Switching Unit HW/SW

• Channel Unit with GPS Unit and LNA RF LNA/Power amplifier

• 19" rack/installation materials

• Outdoor antenna, cables and connectors

• Power Supply Unit

• Back-up power supply (optional)

Table below illustrates capacity requirements depending on the number of subscribers and their activity within 12 hours BH time. Proportion between MOC and MTC is 80/20.

*1 CU provides 12 Thuraya traffic channels
*1 SU provides 30 traffic channels (1 G.703 channels) between SPOT-1500 Gateway and PSTN

As "SPOT-1500" Gateway is equipment directly interfacing PSTN/PLMN, in most cases Type Approval will be required by local communications authorities.

The following price structure covers start-up "SPOT-1500" configuration with 1 Channel Unit and 1 Switching Unit.