User's Manual

DMR repeater 18/02/2011 Versione 1.3
Documento Riservato - non divulgabile senza autorizzazione
Pag. 12 / 32
Base Bandwidth
Audio 300-3400 Hz ±1dB
Modulation 0-5 KHz
Calibration and tests Automatic at start-up and/or by remote control
Remote control Via ethernet / serial RS232 / GPRS
4
4
.
.
3
3
I
I
P
P
I
I
N
N
T
T
E
E
R
R
F
F
A
A
C
C
I
I
N
N
G
G
4.3.1 LAN PROTOCOL
4.3.2 LAN REQUIREMENTS
Protocols for voice packets
UDP/IP (ipv4), unicast (from RA-TI-XXX to master) and multicast
(from master to RA-TI-XXX), with DSCP set to “EF” (Telephony
service class), according to RFC 4594
Protocols for BS “internal” network
control
UDP/IP (ipv4), unicast and multicast, with DSCP set to “CS6
(Network Control service class), according to RFC 4594
Protocols for remote control, setup
and surveillance
UDP/IP and TCP/IP (ipv4) unicast and broadcast with DSCP set to
AF13 (High-Throughput Data
service class), according to RFC
4594
Audio format
Analog: 64 kb/s – 8 bit x 8 KHz linear coded
DMR: AMBE II+
TM
(Advanced Multi-Band Excitation)
Audio frame block net payload
Analog: 60 ms – 480 bytes/samples
DMR selectable single/double timeslot: 60 ms
27 bytes each
timeslot