Gateway Products

Gateway products are required to interconnect systems that run different protocols. In a railway network there are many telecommunication solutions, based on different standards, delivered by many telecom suppliers, delivered over many years. The goal is to migrate all these networks to (SIP) IP, but for many years to come a multitude of protocols need to be supported.

RideOnTrack designed gateway products as typically needed in a railway telecommunication network. Our products support CAS (incl FXO, FXS, E&M, local Battery), CCS (incl. ISDN, QSIG, GSM-R enhancements) and SIP (incl SIP-R and vendor specific flavour). The customer can decide on any combination as is required for his network.

Schematic

Supported Standards:

SIP <-> CAS

SIP <-> ISDN

SIP <-> QSIG

SIP <-> SIP-R

SIP <-> ISDN GSM-R specific

SIP <-> SIP vendor specific

CAS <-> ISDN

CAS <-> QSIG

CAS <-> SIP vendor specific

CAS <-> SIP-R

ISDN <-> ISDN GSM-R specific

ISDN <-> QSIG

ISDN <-> SIP-R

ISDN <-> SIP vendor specific

QSIG <-> ISDN vendor specific

QSIG <-> SIP vendor specific

QSIG <-> SIP-R

The SIP physical connectivity is Ethernet. The CAS/ISDN/QSIG interface is based on G703 (E1). Our standard solution consists of a server with free PCIe slots. These slots can be equipped with PCIeboards supporting the following configurations: 1xE1, 4xE1, 8xE1 or 16xE1. For larger networks, four boards of each 16xE1 can be put in one server resulting in the support of 64xE1. The amount of Ethernet ports as well as the speed of the ports is as per server selection.

The gateway supports protocol granularity on the E1 level. For instance a 16xE1 card could support, 4 x CAS <-> ISDN, 4 x SIP <-> ISDN, 2 x ISDN <-> QSIG and 6 x CAS <-> QSIG or any of the other 17 combinations listed (in E1 steps).

The gateways also support analogue end devices making use of FXO, FXS, E&M and RB signalling . Rail Infrastructure providers do still have many analogue phones  as well as E&M connectivity for instance towards Analogue Radio,  Public Address and Alarm Systems. All these systems are connected via the existing, sometimes very old, CU-infrastructure. As it is very expensive to run fibre to all end devices in a Rail Network, there is the tendency to keep on using the CU-plant as long as possible.