For MVNOs looking to expand from a light MVNO to a full MVNO setup, the upgrade entails deploying a gateway MSC. Whenever a call for a mobile subscriber comes from outside the mobile network, or whenever the subscriber wants to make a call to somebody outside the mobile network – the call will be routed through the GMSC.
Full featured GMSC to route calls to/from outside the mobile network, enables operators to deliver traffic for mobile termination by direct interconnection with key entities in the mobile network sub-system. This is achieved by configuring a flexible range of options within the GMSC that will allow interoperability with the HLR/HSS, BSS billing or number portability functions, Intelligent Network (IN) functions, IVR/VM functions and PSTN networks.
Modulo’s GMSC is built around the Telcobridges TMG series Class 4 Switch or TelcoBridges ProSBC Softswitch, leveraging its features to seamlessly route calls to/from protocols such as ISUP, ISDN, CAS and all types of SIP. The solution allows operators to connect to any type of technology that has been available for the last 30 years for carrying voice calls.
The GMSC is also extensible to allows offline and real-time charging: It allows creating a call data record for each call that can be processed by a billing server, or connecting to a 3rd party billing server via a real-time protocol (such as RADIUS or DIAMETER in order to make decisions on call routing and accounting.
| Host | TelcoBridges TMG Series for hardware configurations TelcoBridges ProSBC for sofware configurations |
| PSTN interfaces | E1/T1 DS3 STM1 |
| IP interfaces | 4x 100/1000Base-T with optional bonding |
| Management interfaces | 2x 100/1000Base-T for OAMP+T 1 RJ45 serial port with RS-232C adapter |
| Vocoders | Universal codecs: G.711, G.723.1, G.726, G.729ab, T.38 V.17, clear mode (RFC 4040) other codecs: G.722.2 (AMR-WB), G.728, G.729eg, iLBC, AMR, EVRC, GSM FR/EFR, T.38 V.34, QCELP |
| Fax/Modem/Data | T.38 fax relay (V.17 and V.34) Automatic G.711 fallback, modem and data pass-through Clear mode (RFC 4040) |
| DTMF relay | RFC 2833 SIP INFO method In-band |
| Echo cancellation | G.168 echo cancellation 128 ms echo tail on all channels simultaneously |
| SIP signaling | Supported RFCs: 2327, 2833, 2976, 3204, 3261, 3262, 3263, 3264, 3311, 3323, 3325, 3326, 3372, 3389, 3398, 3515, 3551, 3555, 3578, 3581, 3665, 3666, 3764, 3891, 4028, 4694, 5806 SIP-I/SIP-T |
| Voice enhancements | Adaptative and programmable jitter buffer (20 to 200 ms) Voice activity detection (VAD) Comfort noise generation (CNG) |
| SIGTRAN | M2PA, M2UA, M3UA (IPSP, ASP, SG), IUA SCTP (raw IP and UDP) SS7 termination and/or relay supported Up to 64 M2UA/M2PA links Up to 20 M3UA peer server processes |
| SS7 | Up to 64 MTP2 links (56, 64, n x 56/64 kbps, HSL) Multiple redundant MTP2 links Up to 64 MTP3 originating point codes and linksets ISUP variants: ITU 92, ITU 97, ANSI 88, ANSI 92, ANSI 95, Q.767, Telcordia 97, ETSIv2, ETSIv3, China, Singapore, UK, Brazil, SPIROU, Japan NTT SCCP routing and global title translation |
| ISDN PRI | Q.931 ISDN PRI: NI-2, 4ESS, 5ESS, DMS-100, DMS-250, Euro ISDN, ETSI NET5 (France, Germany, UK, China, Hong Kong, Korea), NTT (Japan), Australia |
