The Ermetris UIC 568 to SIP VoIP Gateway has been developed for the installations where a cab radio EIRENE, compliant with the UIC568 standard, has to be connected to an audio system realized with VoIP technology. The following scenarios are managed:

  • Public Announcement (PA – UIC 568 std., Service PA)
  • Train conductor recall (TC – UIC568 std., Service IC)
  • Loco-Loco (TL – UIC568 std., IC Service)
  • Environmental listening (AA – std. SES)

AA and TC/TL communications is mutually exclusive. When the AA is not used, the GW ensures compliance with the UIC 568 standard according to the priority rules recommended by EIRENE (chapter 4 Doc. 7) applied to vehicles where a VoIP network is implemented for the train sonorization.

The GW works in a system where a VoCM is installed.The GW make available two channels: one for the public announcement (PA) and another for full duplex communication in the event of a IC service (std. UIC 568). The following parameters has to be set by the user:

  1. SIP User # 1 (for PA communications)
  2. SIP User # 2 (for IC or AA communications)
  3. SIP User # 3 (to produce a GONG sound that informs the conductor is requested to perform a TC call).

A Configuration Flag, to be set in the commissioning phase,  make the GW management of  the Intercom line in AA mode or in UIC568  Standard mode.

Click below to download datasheet

SKU: 018 Category: Tag:


Technical specifications:

Railway EN50155 SIP-VOIP to UIC568 gateway

General features


  • VoIP: G.711 µlaw or Alaw – 8 kHz
  • Diagnostic: SNMP

Power supply

  • 24 Vdc (variations according to EN50155)
  • Consumption: 1 A max at 24 Vdc

Physical characteristics

  • Rack 19” x 1 U (deep 203.2 mm max)
  • Front panel: aluminium


  • Power supply: M12 A code (male)
  • Ethernet: M12 D code (female)
  • UIC568: DB25 (female)
  • 2x DB9 internal converter RS232 to RS422


  • Operating temperature range: EN60068 class T3 -25/+70°C
  • Protection index: IP20 (EN 60529)


  • EN50155 Railway standard
  • Vibrations and shocks: EN 61373 chap.8

cat.1 class B

  • Fire/smoke: UNI/CEI 11170-3
  • MTBF>200.000 h (MIL-HDBK 217F

GM @ 45°C