HC Bridge SRC
Bulk AoIP format and sample rate conversion

HC bridge SRC can be used in many applications, aselection of which are outlined here. This is not an
extensive list of every possibility:

HC Bridge sample rate conversion

Standalone device
HC Bridge SRC provides 256 bi-directional channels of sample rate
conversion for AoIP networks. HC Bridge SRC facilitates connecting audio
between devices running at different sample rates or in different clock
domains on Dante (48 kHz and 96 kHz), AES67 or ST 2110-30 networks.
The two network connections can be to physically or virtually separate networks, providing
control isolation between two sets of equipment where an AoIP discovery and control‘firewall’ is required.

As a standalone device providing conversion, or control
and discovery separation between two networks. The
serial audio on the rear of the unit is looped by a fibre
cable (or cables) between HC Link 1 and HC Link 2.
Four fibre SFPs and two duplex fibre cables will provide
connection redundancy.
As a standalone device the unit can be used withor without an SSL console.

HC Bridge SRC key features

An HC Bridge SRC includes 2 HC cards, each providing 256 Tx and 256 Rx channels at48 kHz or 96 kHz, with 128 Tx and 128 Rx streams at both sample rates. Sample rate
conversion can be disabled if not required.

●S tandalone sample rate conversion of Dante and AoIP sources between two
sample rates or clock domains

An alternate HC Bridge configuration without sample rate converters is available withhigher channel capacity at 48 kHz. An HC Bridge includes 2 HC cards, each provides 512Tx and 512 Rx channels at 48 kHz, 256 Tx and 256 Rx channels at 96 kHz, with 128 Tx
and 128 Rx streams at both sample rates.

●1 2 pairs of GPIO for use with SSL System T consoles

Each card includes a redundant pair of SFP cages for 1GbE RJ45, multi-mode fibre or
single-mode fibre Dante/AoIP connectivity.

●R ear facing HC Link and GPIO connections

Status LEDs
and user buttons

SystemHCBridge
T –SRC
Next-generation– Bulk AoIP networked
conversion broadcast production

If a system requires the use of both sample rates on thesame network, a looped back unit on the network provides
a bulk method to share audio between the different
devices. Dante can support multiple sample rates on
the same network but only devices of the same sample
rate can have audio connected between them. There areexamples of this requirement across live touring, fixedinstallation and music broadcast, using both SSL consoles
and other manufacturers’ consoles.

●R edundant PSUs and Dante/AoIP network connections●F ront facing network connections

HC card 1
USB program port

HC card 2
Dante/AoIP ports

HC card 2
USB program port

With the increased use of Dante on both OB trucks andfestival/event infrastructure, taking a ‘network split’ fromthe stage is an attractive prospect for a broadcast mix. A
Dante or network split is similar to a MADI split, offering
space and cost efficiencies above deploying additional
analogue stage-racks and mic splitters. Sample rate
conversion allows both systems to use independent
clock sources. Physically separating the networks acrossthe HC Bridge allows each team to safely share audio
signals without exposing their network to the other side,
preventing accidental or malicious changes on the othernetwork.

48 kHz and 96 kHz bridge● AoIP discovery and control ‘firewall’ between physically or virtually separate networks

HC card 1
Dante/AoIP

OB truck Dante-to-Dante ‘firewall’

HC Link 2
SFP cages

StatusLEDs

HC Link 1
SFP cages

StatusLEDs

GP inputs &outputs 1-12

Dante ST 2110-30 converter
SSL System T, SSL Live consoles and Network I/O
support Dante and ST 2110 or AES67 on the same
hardware at the same time. Standalone conversion
between Dante and ST 2110 is not required.
However, for some installations it is useful to separate
the audio (Dante) and the video centric (ST 2110)
infrastructure, keeping access to these signals separate.
This provides the benefits of ST 2110 when working withaudio alongside video, in conjunction with the advantagesof automatic stream creation using the Dante API for audio
centric work-flows, particularly where mono audio routing
is required.
Used as a Dante ST 2110-30 converter an HC bridge isanalogous to an SDI or MADI connection between an
audio and video router in a baseband system. As withmany infrastructure design choices, the total number ofsimultaneously used channels and the intended ability tomake changes – or not – factor into connectivity choices.
An HC Bridge SRC or an HC Bridge can be used as aDante and ST 2110-30 (level A, B and C) converter.

RedundantPSUs

Product information
Partcode

Description

Note726932X1

NET I/O HC Bridge

No SFPs included

726933X1

NET I/O HC Bridge SRC

No SFPs included

SFPs for Dante/AoIP connection (four per unit required)
32SPERG2

SFP RJ-45

32SPMLG2SFP LC Multimode

32SPSLG2SFP LC Singlemode

SFPs for Looped Fibre connection (four per unit for fibre redundancy)
32SPMLDBSFP LC Multimode

32SPGLDBSFP LC SinglemodePhysical Specification
Height

1RU, 44.5mm (1.75”)

Width483mm (19”)

Depth

340mm (13.4”)

Weight

4.5kg

AoIP support:Dante, AES67 RTP streams. PTPv1 & PTPv2 (AES67 profile). SAP/SDP for AES67.
Management from Dante Domain Manager for ST 2110-30 streams (level A, B and C). ST 2022-7. PTPv2 (ST 2059-2 and manually editable profile)

International HQ: Begbroke, Oxford, OX5 1RU, England
Tel.System+44 (0)1865
842300 · sales@solidstatelogic.com· www.solidstatelogic.com
T – Next-generation
networked broadcast production