TN661 UIC-5 Universal Interface Card
MT-4 Radio Systems
TECHNICAL NOTES
Page 5 of 6
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CODANCOMMS.COMTECHNICAL NOTE:
TN661, REV 2-0-0, © Jan 2019
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Recommended Network Requirements for P25 DFSI with Codan UIC
Following is a list of recommended network requirements for both the Codan UIC-4 and UIC-5 cards for P25
Digital Fixed Station Interface connection (in both P25 and analog mode).
These recommended values are for the Codan equipment. Other P25 DFSI equipment (consoles / base stations)
may have diff erent network requirements.
Specifi cation Fixed Network 3G / LTE Network Notes
Latency < 20 ms < 250 ms Based on end user acceptable audio delay
Jitter (UIC-5) < 8 ms < 100 ms *See Note below
Jitter (UIC-4) < 4 ms < 15 ms
Packet Loss (UIC-5) < 3% < 6% Better than DAQ 3.4 voice reproduction
Packet Loss (UIC-4) < 0.5% < 1%
Bandwidth 250 kbps or better (full duplex) Minimum 70kbps for P25 voice and/or 100kbps
for Analog
Note: For jitter conditions beyond the stated values (eg. satellite communications), increasing the audio buff er will
account for these situations at the cost of additional voice latency.
The UIC confi guration settings for the buff er are as follows:
UIC Confi guration Setting Default Value Range
Audio Buff er Length (UIC-4) 200 ms 40 - 500 ms
Audio Buff er Length (UIC-5) 200 ms 20 - 10000 ms
The UIC-4 is more sensitive to jitter and packet loss, the maximum specifi cations shown for a 3G / LTE network
may result in less than ideal performance.
IMBE™ is a trademark of Digital Voice Systems, Inc.
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