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
■■ Optional redundant power supply :
+12V, -48V DC
■■ IP Link 100/100p: Single bidirectional
stereo audio channels
■■ Built-in silence sensor with optional
stream switch over
■■ IP Link 200: Two bidirectional stereo
audio channels
■■ Automatic backup to audio playout from
USB drive or external audio source
■■ Standard: Linear, AAC-LC, Opus and
G.722 audio coding
■■ Multicoding – can encode the same
audio source in multiple formats for
STL, backup, and Web streaming
■■ 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 kS/s to support composite
FM multiplex signal over AES
■■ Protocol Encapsulation: RTP,
■■ Interoperable with standard SIP/RTPenabled devices
■■ Three independent IP interfaces for
redundant network operation
■■ 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)
■■ Programmable RTP level Forward Error
Correction (FEC) scheme
■■ Programmable Time Diversity and
Interleaving of streams to combat burst
packet losses
Connecting What’s Next
■■ Integrated with Intraplex IP Link
Scheduler for automated scheduled
program switching
■■ Integrated with Intraplex LiveLook
(Network Analytics and Monitoring
■■ N+1 redudancy 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
■■ Four multipurpose contact closure
inputs and outputs provide
■■ Transport of logic signals with timealignment to audio
■■ Stream control
■■ Alarm notification
Product Details
The IP LINK family of audio codecs was
designed to provide unprecedented level of
reliability from ground up. At the hardware
level, the N+1 redundancy with built in
control for both audio routers and data
switches provide automatic synchronization
of configuration and switch over capability.
This reliability is further enhanced with
optional hot-standby power supply.
At the streaming layer, the 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 and 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 configure
and operate.
The IP Link 200 and 100p provide 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 and 100p provide a single bidirectional stereo channel while the IP Link
200 adds a second stereo in both directions.
Both the IP Link 200 and IP Link 100p
include 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: 1 stereo (or 2 mono) program channels, encode and decode
IP Link 200: 2 stereo (or 4 mono) program channels, encode and decode
Front Display
IP Link 100p and IP Link 200
Coding Options
Standard: Linear, AAC-LC, Opus, G.722
Optional: MPEG2, MPEG3, AAC-HE, AAC-HEv2, AAC-ELD, Enhanced aptX and Transparent AES transport
EBU N/ACIP Tech 3326, SHOUTcast/Icecast, MPEG Transport stream over IP, Transparent AES,
Programmable up to 1 second with 1 microsecond accuracy
Allows the input to be encoded and streamed out using multiple different algorithms simultaneously
For input, digital/analog auto-detection
For output, digital and analog 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 between: 2400, 4800 and 9600 bp/s
Associated Data
With time-alignment to audio via RS-232 @2.4, 4.8, 9.6, 19.2 kbs and via UDP/IP messages
Contact Closures
8 opto-isolated contact closures in each direction, with time-alignment to audio
Inputs can transport state to peer or put a stream in or out of service
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:
IP Link 100: 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 input/output
RS-232 data: DB-9
Contact Closures: HD-26
Front panel: Audio headphone jack
Internal antenna: SMA
External (10 MHz, 1 PPS connectors): BNC
Digital Audio
Accepted Audio
Accepts any AES/EBU sample rate between 32 and 48 kS/s
Sampling Rates
Audio Sample
Selectable 16 or 24 bit
Sample Rate
Automatic rate conversion at input to any other AES/EBU sample rate between 16 and 48 kS/s
Balanced, 110 ohms ±20%
AES Transparent Transport
Sample Rate
32, 44.1, 48, and 192 kS/s
Analog Audio
Input Impedance
Balanced, greater than 10 k ohms
Output Impedance
Balanced, less than 52 ohms
Ethernet Data Rate
10/100Base-T (10 or 100 Mb/s) Full duplex
Auto-negotiation with network
2 WAN ports plus separate management
Network Protocols
Per port 802.1 pq configuration; 3 Network ports available for both streaming and management traffic
(v1, v2)
Web browser interface
RTP Streams
Total of 12 streams
Setup: Static or SIP
Unicast, multiunicast, multicast
Standard RFC payload formats, Auto configuration
Source IP address and UDP port verification at the receiver for security
TCP Streams
Total 12 HTTP streams to feed
SHOUTcast or Icecast servers with selectable codec and coding rate for each stream
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
Dynamic Stream
Optional: Enables redundant streams to be received across one or more networks
Jitter Buffer
Programmable jitter buffer depth to 1024 packets
Connecting What’s Next
Forward Error
Multiple levels of 1 and 2 dimensional FEC schemes Configured per stream from 25%, 50%, 66% and 100% overhead
Time Diversity
Time delay configured on per stream basis, used with redundant streams for burst packet loss
Matrix configured per stream used to prevent consecutive packet losses
Packet Loss
Automatically performed by the system
Test Tone
1004 Hz test tone at -12 dBFS Equivalent to +8 dBm input
Received stream loopback equipment loopback
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
Sent and received total stream bandwidth
Status Indicators
LED Indicators
Link activity, link status
IP Link 100: Multi-color LED indicators for L&R audio input and output
IP Link 100p: VU meters for Channel 1 input and output
IP Link 200: VU 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 14.25 in.
(H X W X D)
(4.45 x 48.3 x 36.2 cm)
EIA rack mountable 5 lbs (2.27 kg) typical
Power Supply
Main: Universal AC, 50/60 Hz
Backup: Optional external module, universal AC to 12 VDC converter
20 watts or less
Fuse Protection
2A AC input fuse
Convection cooled
To 95% 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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