Intraplex®IP Link
Intraplex® IP Link
IP Audio Codecs
The Intraplex® IP Link family of IP audio codecs
provides high-end features at an affordable price
Offering an array of audio coding options, the IP Link
codecs are suitable for use in Studio to Transmitter Links
(STLs) as well as audio contribution and distribution
networks. Support for IP multicast and multiple unicast
streams enables one encoder to feed multiple decoders.
By incorporating three IP Interfaces that can be used for streaming and management, the IP Link systems can provide a level of
reliability not seen in comparably-priced codecs.
As the latest addition to the Intraplex family of audio transport products, the IP Link audio codecs bring legendary Intraplex
reliability to the IP codec market.
Product Features
■ Built-in silence sensor with optional
stream switch over
■ IP Link 100/100p: Single bidirectional
stereo audio channel
■ Automatic backup to audio playout from
USB drive or external audio source
■ IP Link 200: Two bidirectional stereo
audio channels
■ Multicoding – can encode the same
audio source in multiple formats for
STL, backup, and Web streaming
■ Standard: Linear, AAC-LC, Opus and
G.722 audio coding
■ Optional: AAC-HE, AAC-HEv2, AAC-ELD,
MPEG2, MPEG3 and Enhanced aptX
audio coding
■ Optional: Automatic audio loudness
leveling and metering compliant with
EBU R-128 and ITU-R
■ Other transport modes: Transparent
AES up to 192 ksps to support
composite FM multiplex signal over AES
■ Protocol Encapsulation: RTP,
SHOUTcast/Icecast, MPEG-TS
■ Three independent IP interfaces for
redundant network operation
■ Optional redundant power supply:
12VDC or 48VDC
■ Optional Dynamic Stream Splicing
providing “hitless” operation and T1/
E1 circuit like performance on less
predictable IP networks
■ Prioritized stream sources at the output
with automatic switch over and switch
back between primary and secondary
streams and backup sources (streams,
USB, external audio source)
■ Integrated with Intraplex LiveLook
(network analytics and monitoring
■ N+1 redundancy with integrated control
of external switching equipment
■ IP Link 200/100p: SynchroCast™
option provides dynamically managed
precision delay for Single Frequency
Network (SFN) broadcasting and
■ Support for IP multicast and multiunicast
■ Web browser user interface and SNMP
network management
■ Eight multipurpose contact closure
inputs and outputs provide:
■ Programmable RTP level Forward Error
Correction (FEC) scheme
■ Transport of logic signals with timealignment to audio
■ Programmable time diversity and
Interleaving of streams to combat burst
packet losses
■ Stream control
■ Alarm notification
■ Integrated with Intraplex IP Link
Scheduler for automated scheduled
program switching
Connecting What’s Next
Product Details
The IP Link family of audio codecs were
designed to provide unprecedented level of
reliability from ground up. At the hardware
level, the N+1 redundancy with built in
control for data switches provide automatic
synchronization of configuration and switch
over capability. This reliability is further
enhanced with optional hot-standby power
At the streaming layer, Dynamic Stream
Splicing provides a set of networking tools
for reliability, such as redundant streams
with network and time diversity. The
support of Forward Error Correction (FEC)
and interleaving further enhances these
capabilities. These tools can be intelligently
combined to achieve reliability generally
associated with T1/E1 circuit over less
robust IP networks. Hitless operation can
be achieved when multiple networks are
available. The use of time diversity on
redundant streams along with FEC and
interleaving can provide protection against
burst packet losses.
The IP Link audio codecs also offer
Multicoding, the ability to simultaneously
encode the same audio program using
multiple different algorithms. Multicoding
can, for example, allow the user to send
linear uncompressed audio on a main STL,
while sending the same program with AAC
coding on a lower-bandwidth backup link
and MP3 to feed a streaming Web server
such as SHOUTcast.
A built-in optional Audio Loudness Leveling
capability ensures that the loudness of
incoming audio is kept at a consistent level
based on the EBU R128and ITU-R standard.
A built-in silence sensor and alarm enable IP
Link codecs to offer a variety of automatic
backup options. If the main link is lost, it can
switch to a secondary feed from a lower-
bandwidth link, if available. In the event of
total IP connectivity loss, the system can
switch to playout from a plug-in USB drive
or from any local audio source connected
to the audio inputs on the rear panel. A
comprehensive Web browser interface
makes the IP Link codecs easy to monitor,
configure, and operate.
The IP Link 200 and 100p provides optional
SynchroCast capability to dynamically align
the playback of audio at geographically
dispersed transmitter sites for SFN
broadcasting. This capability can be used
with compressed or linear audio formats.
The IP Link 100/100p provides a single
bi-directional stereo channel, while the
IP Link 200 adds a second stereo in both
directions. VU meters for each channel, and
a convenient front panel user interface to
access key configuration settings and status
Specifications and designs are subject to change without notice
IP Link 100/100p: One stereo (or two mono) program channels, encode and decode
IP Link 200: Two stereo (or four mono) program channels, encode and decode
Front Display
IP Link 200/100p: Graphical front panel user interface - 3.2 inch display; 256 x 64 pixel, white monochrome OLED; six-button
keypad; VU meters for each audio channel
Audio Coding
Standard: Linear, AAC-LC, Opus, G.722
Optional: MPEG2, MPEG3, AAC-HE, AAC-HEv2, AAC-ELD, Enhanced aptX and transparent AES
Audio Loudness
Optional: Leveling, metering with true-peak measurement and brick-wall limiter applied to the input analog and digital audio
in conformance with ITU-R BX1770-3 and EBU R 128
EBU N/ACIP Tech 3326, SHOUTcast/Icecast, MPEG Transport Stream over IP, Transparent AES, SynchroCast
Optional: Audio delay programmable up to 1 second with 1 microsecond accuracy
Allows the input to be encoded and streamed out using multiple different algorithms simultaneously
Dual domain: AES/EBU and analog
For audio input, AES/EBU / analog is auto-detected
For audio output, AES/EBU and analog are simultaneous
Can provide a TCP stream to a SHOUTcast or other Webcasting server
Configurable for automatic backup to secondary incoming audio stream, playout of audio from USB drive, or playout of audio
from a local device connected to the rear panel inputs
Aux Data Channel
RS-232, in- or out-of-band data transport programmable to 2400, 4800 and 9600, and 19200 bps with time-alignment to
audio streaming
Contact Closures
Eight input and eight output opto-isolated contact closures, with time-alignment to audio streaming
Contact inputs can transport state to peer or control stream state
Contact outputs can receive state from peer or be tied to system alarms
N+1 with integrated support of external switching equipment
Connecting What’s Next
Rear panel:
Ethernet: Three 10/100 Base-T, RJ-45
IP Link 100/100p: XLR for analog L&R and digital AES/EBU inputs and outputs
IP Link 200: XLR for channel 1 analog L&R and digital AES/EBU inputs and outputs, RJ-45 connectors with StudioHub cabling
format for channel 2 audio inputs/outputs
RS-232 data: D-sub, 9 pin male
Contact Closures: D-sub, 26-pin female
USB: Type A
DC Power: Two pin screw terminal
AC Power: C14 power inlet
Front panel:
Ethernet: One 10/100 Base-T, RJ-45
Audio Headphone: One ¼” stereo headphone jack
GPS (IP Link 200/
IP Link 100p only)
External GPS: 10 MHz and 1 PPS BNC connectors
Optional: GPS receiver plug-in board kit with SMA connector for external GPS antenna (provided with kit)
Digital Audio
Accepted Audio
Accepts AES/EBU sample rates between 32 and 192 ksps
Sampling Rates
Sample Rate
Automatic rate conversion at input with dynamic range of 128 dB
AES Transparent Transport
Sample Rate
32, 44.1, 48, and 192 ksps
Analog Audio
Input Impedance
Balanced, greater than 10 k Ohms
Output Impedance
Balanced, less than 52 Ohms
Audio Frequency
48 ksps: 10 Hz to 22 kHz
44.1 ksps: 10 Hz to 20.5 kHz
32 ksps: 10 Hz to 15 kHz
Audio Level
Full scale analog audio input/output:
9 to 24 dBu, user-settable in 1 dB steps
Total Distortion
(THD+N) Less than 0.003% at 1 kHz, -1 dBFS input
Dynamic Range
Greater than 91 dB
Sample Size
16 or 24 bit
Ethernet Data Rate
10/100Base-T (10 or 100 Mbps) full duplex, auto-negotiation
Two WAN ports plus management port. Mirror port on front panel
Network Protocols
Per port 802.1 pq configuration; Three network ports available for both streaming and management
(v1, v2)
Web browser interface
RTP Streams
Total of 12 streams
Setup: Static or SIP
Unicast, multi-unicast, multicast
Standard RFC payload formats, auto configuration
Source IP address and UDP port verification at the receiver for security
TCP Streams
Total 12 SHOUTcast/Icecast transmit or receive streams with selectable codec and coding rate for each stream
Connecting What’s Next
Compliant with EBU N/ACIP Tech 3326
Works in peer to peer and proxy mode
NAT traversal support
Automatic failover mode between Primary, Secondary and Backup streams
Backup Audio
USB Playlist, Local input channel, Other output channel (IPL 200)
Dynamic Stream
Optional: Enables multiple identical audio streams to be sent across the IP network (or two separate IP paths, if available) and
provides for hitless switching at the decoder
Jitter Buffer
Programmable jitter buffer depth up to 1024 packets. Static or automatic jitter buffer adjustment
Forward Error
Multiple FEC schemes configured per stream with 25%, 50%, 66% and 100% overhead selection
Time Diversity
Time delay configured on per stream basis, used with redundant streams for burst packet loss protection
Configured per stream for mitigation of consecutive packet losses
Test Tone
1 kHz test tone at -12 dBFS
Input to output channel equipment loopback while simultaneously sending streams from the input channel
Statistics Tracked
Burst packet loss statistics based on RFC 3611
Per stream and group statistics for packets received, packet lost, packets recovered by FEC and packets sent
Send and receive stream bandwidth
Status Indicators
LED Indicators
Stream activity and status
IP Link 100: Multi-color LED indicators for L&R audio input and output
IP Link 100p: Multi-LED bar graph audio level meters for channel 1 input and output
IP Link 200: Multi-LED bar graph audio level meters for channel 1 and channel 2 input and output
Alarm Reporting
Major/minor alarms, normally open relay contacts, SNMP traps
Maintains internal and syslog messages alarm log
Log files can be sent off to off-site server for storage
User configurable per-stream packet loss threshold
Built-in silence detection with ability to provide alarm and perform switch over of stream on loss of audio
Mechanical and Environmental
1RU: 1.75 x 19 x 10.1 in.
(H X W X D)
(4.45 x 48.3 x 25.7 cm)
EIA rack mountable 5 lbs (2.27 kg) typical
Power Supply
Main: AC 100-240 VAC, 50/60 Hz with type T2A 250 V AC input fuse
Backup: Optional external module, AC to 12 VDC converter or internal module for -48 VDC
15 watts
10% to 90% non-condensing
32º to 122º F (0º to 50º C)
CE, FCC Part 15 Class A, UL 60950, RoHS
Connecting What’s Next
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