1. ISDN Back-up www.2n.cz 2N ® NetStar

2. Basics of ISDN back-up: www.2n.cz Back-up for outbound and inbound calls via independent GSM/UMTS networks Incoming calls with DDI support over GSM/UMTS Outgoing calls with original CLI support ISDN back-up

3. User’s Side 211212 PBX BRI, PRI GSM Gateway MSC 2N ISDN Backup Platform 299 PSTN PSTN Host BRI, PRI ISDN Back-up of 261 301 xxx 261 301 xxx Alarm SMS forwarding 261 301 xxx to 2N ISDN Back-up Platform Calling at 261 301 299 78 11111111 78 11111111/ 299 299

4. Benefits to providers: www.2n.cz Can be offered as a part of SLA Long term contract with the customer Loyalty of important customers who require guaranteed availability ISDN Back-up

5. Benefits to customers: www.2n.cz 100% availability New services without the need to upgrade your current PBX ISDN Back-up

6. References: www.2n.cz Telefónica O2 Czech Republic 2N ® NetStar

7. Parts of this solution: www.2n.cz 2N GSM Gateway BRI PRI 2N ISDN Back up Platform Intelligent clip modification SIM hunting One number reach Database Redundancy for back-up 2N ® NetStar

8. 2N TELEKOMUNIKACE Modřanská 621, 143 01 Praha 4 Czech Republic Tel.: +420 261 301 500 Fax: +420 261 301 599 E-mail: sales@2n.czsales@2n.cz www.2n.cz Start testing tomorrow!