Public Address over IP on Train Station Platforms
DVS-21 VoIP - LCPU
National sales by:
RSR Datacom GmbH & Co. KG
Alfredstrasse 157
D-45131 Essen
Tel.: +49 (0) 201 860 670 - 0
Fax.: +49 (0) 201 860 670 - 40
info@rsr-datacom.de
www.rsr-datacom.de
Deutschland / Germany
A system that speaks for itself.
Voice over IP - Application with the DVS-21 System
Features
! The Basis Platform is the DVS-21
A modular concept, can be universally applied (PA, intercom, remote operation…),
stations can be cascaded, system has interfaces to transmission technology
! Compatibility to Public Address System Requirements
Compliant to german railways specifications like "Public Address on Train Station Platforms", equipment regulations "Public Address on Train Station Platforms" for equipment levels 1 and 2, application description “Public Address Over IP Networks (VolP)"
! Main Functions of IP Public Address
In addition to the general functionality of a public address system there are certain requirements in the area of IP public address which require special solutions. The important requirements are listed as follows:
- Standard communication protocol H.323 / SIP |
- Call/session: RTP monitoring |
|
- Automatic / manual selection |
during an active connection |
|
- Authentication / prioritizing |
- Timeout: during an active connection |
|
(Refusal) |
(Suppression) |
- Issuing of an advance signal before an |
- Voice delay less than 1 s |
announcement |
|
- Connection and call/session monitoring |
- Indication of message operation and errors |
|
- Connection: Keep-alive (Conforming to |
over SNMP trap |
|
|
Connection protocol) |
|
International sales by:
ProCom
Professional Communication
& Service GmbH
Alfredstrasse 157
D-45131 Essen
Tel.: +49 (0) 201 860 670 - 90
Fax.: +49 (0) 201 860 670 - 98
info@procom-communication.de
www.procom-communication.de
! Software, Voice over IP
Linux operating system, DVS-21 API (Application Programming Interface), Application: VolP - LCPU (Voice over IP for LCPU)
! LCPU Hardware
DVS-21 System Module 3HE / 6TE
Intel XScale PAX 255, 400 Mhz
64 MB SDRAM (32 bit @ 100 Mhz)
32 MB Flash Memory (32 bit), CF-card up to 2 GB 10/100 MBit Ethernet controller, RJ45 connection
Universal module connection (Attachment modules: SO, E1, RS232)
All rights and changes reserved V1.2
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