How traditional systems work Via chain of PSTN

How traditional systems work: Via chain of PSTN providers: If buyer’s PBX would know direct path to seller: • Improve call quality and reliability • No multiple re-codings • No extra fees That’s why was “invented” ENUM (rfc 6116)

ENUM - E. 164 NUmber Mapping (rfc 6116) a suite of protocols to unify the telephone system with the Internet “Address book” to find the path to a certain IP PBX by a telephone number serviced by it. Wiki: Telephone_number_mapping In above example above, ENUM works as follows: • Seller registers his IP PBX in ENUM server • When calling, Buyer’s IP PBX makes a query to ENUM server, trying to find a “shortcut” to Seller’s bypassing the PSTN network • If shortcut exists, Buyer’s PBX uses it. If not, it uses conventional PSTN way and pays landing fees

Why ENUM is not popular? • PTSN providers are not interested to publish their shortcuts in ENUM • No place to register for individual/business phone owner • Non-transparent ENUM resolving rules, depend on proprietary service owner logic • Critical dependence on some single provider • Bottleneck in a centralized resolver • Vulnerability vs service malfunction or attack to DNS infrastructure.

ENUMER = ENUM + Eme. R = Decentralized ENUM

ENUMER - blockchain-based decentralized ENUM • Anyone can register his own number • Transparent ENUM resolving rules, configurable by PBX owner • Decentralized nature, independent from any company or other provider • Local and instant resolving - no bottleneck, no dependence of ENUM server health or DNS infrastructure • Much better call connection time than through PSTN - ~0. 2 s vs ~3 s • Possibility to use HD audio/video codecs and TLS/SRTP, what is unavailable on PSTNs.

Thus ENUMER makes the ENUM system: • Fast • Reliable • Protected • Highly scalable (to any extent) • Not depend on anybody (cannot be blocked, spoofed, hacked etc. ) • Transparent algorithm of resolving addresses • Configuration through local software • No need to add some code to your current PBX software

ENUMER is already used by: www. portaone. com/solutions/blockchain www. portaone. com/success-stories/portaone-emercoin-blockchain ezuce. com/ezuce-emercoin-speed-adoption-blockchain-phone-video-services

More info about ENUMER: bit. ly/ENUMER

Our contacts:

One blockchain - lot of services! Some services beside ENUMER:

http: //bit. ly/ENUMER Meet us 4 -5 May at chainges. co, Amsterdam