1. VIERLING   EVT - Wn Folie 1 VIERLING Group Pretzfelder Straße 21  D-91320 Ebermannstadt  Phone: +49 (0)9194 97-0  Fax: +49 (0)9194 97-100  Homepage: www.vierling.de VT Multichannel System VIERLING 32 Channel GSM Gateway VIERLING

2.   EVT - Wn Folie 2 VIERLING - Mobile Gateways VT MultiChannel System VIERLING - GSM Gateways VT MultiChannel System

3. VIERLING   EVT - Wn Folie 3 Why mobile gateways?  Conversion of “fixed to mobile” (or “mobile to fixed”) calls into “mobile to mobile” calls Mobile Gateway Cost Reduction

4. VIERLING   EVT - Wn Folie 4 Configuration levels per 19” IPC housing (4U):  Up to 32 GSM Channels, 4 x PRI, 1 x IP, or  Modular expansion (in steps of 4 GSM channels)  Only 2 antennas required VT MultiChannel Configuration Basics

5. VIERLING   EVT - Wn Folie 5 Interfaces PRI :- E1/T1, TE/NT, CRC4 / double frame - Q.931, DSS1, SS7-ISUP (optional), QSIG-BC, national GSM :- dual band engines (900/1800 Mhz) - Half rate / full rate / enhanced full rate SMS - 2 antennas (1 per 16 channels) - multiple SIM cards per GSM channel Dimensions :- 19’’ rack mounted industrial PC (4 U high) - (555 x 440 x 177) mm - 20 kg VT MultiChannel Technical Data

6. VIERLING   EVT - Wn Folie 6  4 x E1 support (DSS1 (Q.931), or SS7 International ISUP option)  2/4/8 SIM/channel (256 SIMs per 32 GSM ch. Gateway) -Automatic switchover between cards (programmable trigger values) -Take advantage of different (pre-paid) time quota SIM contracts (automatic shutdown/switchover once time quota has expired)  Automatic SIM card IMSI* recognition -Avoids expensive misrouting (e.g. by wrongly replaced SIM cards)  CDR Generation  SIM Lock / IMEI lock possible (Machine is locked for one carrier only) * IMSI: International Mobile Subscriber Identification VT MultiChannel Base Model Features

7. VIERLING   EVT - Wn Folie 7 Channel exploitation second to none:  Stand-by Channels configurable (e.g. two “excess” channels in a 32 ch. Gateway: stand-by SIM cards immediately take over service, leaving previous SIM card time to recover)  In-band to out-band signaling conversion: -Rejection of useless calls (all in-band signaling is converted to out-band-signaling, allowing immediate rejection of useless calls (“busy”, “not available”, “wrong number”, etc.)) -Re-routing of useless calls (after rejection, calls are re-routed through e.g. PTT network) -High Quality of Service (QOS) Conversion of in-band alert tone into clean D-channel signaling VT MultiChannel Base Model Features

8. VIERLING   EVT - Wn Folie 8 Remote management software (via ISDN and/or LAN (IP card option))  Included with every gateway  Configuration of ALL interfaces (PRI, GSM, BRI) on ONE user screen  Remote maintenance reduces on-site visits to an absolute minimum  All maintenance ONLINE  Extensive traffic statistics tools  Built-in remote D-channel Tracing Tool VT MultiChannel Base Model Features

9. VIERLING   EVT - Wn Folie 9 Selected integrated ROUTING FUNCTIONS:  Automatic routing to next available channel (in case of failure/bottleneck)  Balanced call distribution to assigned channels, based on -Number of calls -Allows effective pre-paid SIM card change (“all at once”)  Sophisticated alternative routing  Time dependent routing  CLIP / CLIR dependent routing (rejection of CLIP calls) VT MultiChannel Base Model Features

10. VIERLING   EVT - Wn Folie 10 Installation & Setup within few* hour ! * Assuming appropriate site preparation (e.g. availability of E1, 220V, installed antenna cables,...) VT MultiChannel Installation