TDM Protocol Converter

The protocol converter allows to combine systems that use different signalling protocols (SS7, PRI EDSS1, QSIG, V5.2, R2 CAS, R1.5, SIP) into a unified telecommunication network.

TDM Digital Switch

TDM switch is a digital switch of E1 links that supports the following signaling types at a time: SS7, PRI EDSS1, V5.2, R2 CAS, R1.5, SIP.

The switch is designed to enhance efficiency of solutions when building and upgrading urban and corporate communications networks.

E1 PCM Multiplexer

The solution distributes E1 flow channels between several E1 links.

SIP/E1 VoIP Media Gateway

This VoIP Media gateway provides integration of IP and TDM/PSTN networks with great flexibility while minimizing capital and operating costs.

Since this gateway supports all PSTN/TDM protocols, it can be used for redesign and retrofit of all network types.

Establishing Corporate VoIP Communication

This solution allows to eliminate the use of the central switching unit (softswitch) by creating corresponding numbering plan in each gateway, i.e. each network element knows where the specific subscriber is and it can access his gateway directly.

Such an approach adds stability to the network since network outages do not occur when the central switching unit gets out of order.

Operating with a Broken E1 Stream

MBDD Systems SIP/E1 Gateway provides transparent connection of calls from PBX to PSTN and backwards. The communication costs can be minimized using SIP connection.

Features:

• Hardware cross-connection of E1 stream time slots provides transparent connection, does not add a delay and does not reduce the audio quality

• Operating as protocol converter, for example PRI ISDN in SS7

• Optimizing the number of E1 channels/links towards PSTN

• Up to 460 SIP connections supporting G.711, G.723, G.726 and G.729 voice codecs and T.38 fax codec towards SIP providers

• Establishing SIP connections towards both sides of E1: towards PBX and towards PSTN.

SS7/DSS1 to SIP Gateway

This solution is used when it is required to replace the TDM Switch with a SoftSwitch. If multiple subscriber nodes are connected to the TDM Switch over the SS7 interface they can be switched to the SoftSwitch using the gateway as indicated on the figure.

In this case the SS7 interface disconnects from the TDM Switch and connects to the gateway that is connected to the SoftSwitch via the SIP data communications network.

SIP to SS7/DSS1 Gateway

This solution is used when it is required to connect VoIP subscribers from the local network to the PSTN number capacity. If the operator has the existing TDM Switch with free SS7 interfaces the gateway on the TDM network side looks as the SS7 subscriber node while on the IP network side it looks as the IP Telephone Exchange where IP subscribers register.

V5.2 to SIP Gateway

This solution is used when it is required to replace the TDM Switch with a SoftSwitch. If multiple subscriber nodes are connected to the TDM Switch over the V5.2 interface they can be switched to the SoftSwitch using the gateway as indicated on the figure.

In this case the V5.2 interface disconnects from the TDM Switch and connects to the gateway that is connected to the SoftSwitch via the SIP data communications network.

SIP to V5.2 Gateway

This solution is used when it is required to connect VoIP subscribers from the local network to the PSTN number capacity. If the operator has the existing TDM Switch with free V5.2 interfaces the gateway on the TDM network side looks as the V5.2 subscriber node while on the IP network side it looks as the IP Telephone Exchange where IP subscribers register.

iDLU Gateway for EWSD Digital Switching System and iSUB Access Gateway for DX 200 Telephone Exchange Upgrade

The digital line of EWSD/DLU or DX200 R3, R4, R5 switches are connected directly to a specialized IP media gateway (iDLU/iSUB Access Gateway) by using intra-exchange PCM lines and respective intra-exchange protocols.

This solution allows telecommunications operator to reduce significantly the prime cost of telecommunications services provided to PSTN subscribers.

All subscribers of upgraded Telephone Exchange will obtain the full package of services from NGN/IMS service servers.

This will help to solve automatically the issues with call charging, switching to prospective numbering plans, porting numbers and monitoring outgoing and incoming calls.

Upgrading will make it possible to save the subscriber number when implementing the communications services using PON and FTTB technology (SIP telephony, Internet access, IPTV), which will encourage subscribers to switch to more expensive pricing plans.

Network Maintenance and Monitoring System of VoIP Gateways Parameters

Using a specialized network monitoring system from MBDD Systems, it is possible to control all the key parameters of digital VoIP gateways (availability, bandwidth and emergency events).

Gateway Monitor software is a specialized network monitoring system for servicing up to 500 digital VoIP gateways.

Gateway Monitor uses SNMP protocol to work on the network.