ALLEN HEATH DX32 Modular Expander User Guide
- June 14, 2024
- ALLEN HEATH
Table of Contents
DX & GX System Guide ISS_5 
Overview
The DX & GX systems enable engineers to increase analogue and AES3 digital I/O in dLive, Avantis, AHM and SQ systems via the use of DX Expanders, GX Expanders and DX Distribution options.
Protocols
The DX protocol carries 32×32 channels of 96kHz audio per DX connection.
Each DX connection can accommodate 1x DX32 or up to 2x DX168/DX164-W/DX012
expanders.
The GX and gigaACE protocols carry 128×128 channels of 96kHz audio per
connection.
Each GX connection can accommodate 1x GX4816 expander, and additionally up to
2x DX32, or up to 4x DX168/DX164-W/DX012 expanders connected to the GX4816.
The ME and dSnake protocols carry 0x40 and 40×40 channels respectively of
48kHz audio per connection.
Each ME connection can accommodate an unlimited number of ME devices, via
daisy chaining and/or a ME-U or PoE hub.
Multiple DX and GX connections can be present in a dLive, Avantis, AHM or SQ
system to massively expand the system analogue I/O.
SLink
The SLink port, found on SQ, Avantis and AHM mixers, is a multi-protocol port
which supports connection via DX, GX, gigaACE, ME and dSnake.
AHM does not support ME connections.
DX Expander Connectivity
DX32
The DX32 is a modular expander offering 4x 8 channels slots to fit a selection
of analogue or AES3 digital I/O.
Socket:| Connects to:|
---|---|---
DX A| Surface or MixRack or SLink or DX Link or DX Hub| (32×32)
DX B| Redundant connection for DX A| (32×32)
8 Channel Module Options
-
M-AIN – 8 Recallable Preamps With XLR Connectors For Balanced Or Unbalanced Microphone And Line Level Signals.
Gain, Pad And 48V Are Digitally Controlled Within The Preamp -
M-AOUT – Line Level, Balanced XLR Outputs. The Outputs Are Relay Protected To Prevent Power On Or Off Thumps
-
M-DIN – 4x Stereo AES3 Inputs On XLR With SRC (32kHz – 192kHz Sampling Rate). Sample Rate Conversion Can Be
Bypassed For 96kHz Operation -
M-DOUT – 4x Stereo AES3 Outputs On XLR (44.1kHz, 48kHz, 88.2kHz Or 96kHz Switchable)
-
M-DX32-INPR – Premium 8 channel microphone preamp
-
M-DX32-OUTPR – Premium 8 channel line-output
http://www.allen-heath.com/ahproducts/dx32/
DX168 / DX164-W / DX012
The DX168 is a fixed format expander offering 16 inputs and 8 outputs in a
rugged stage box.
The DX164-W is a fixed format expander offering 16 inputs and 4 outputs in a
wall mountable chassis.
The DX012 is a fixed format expander offering 12-16 outputs (depending on
configuration) in a 1u rack mountable format .
Connection Options
Mode = Cascade
DX A| Surface or MixRack or SLink or DX Link or DX Hub (if 1st device)|
(32×32)
---|---|---
DX168/DX164-W/DX012 (if 2nd device)| (32×32)
DX B| DX168/DX164-W/DX012 (if 1st device)| (32×32)
Not Used (if 2nd device)| (32×32)
Mode = Redundant
DX A| Surface or MixRack or DX Link or DX Hub| (32×32)
DX B| Redundant connection for DX 1| (32×32)
http://www.allen-
heath.com/ahproducts/dx168/
http://www.allen-heath.com/ahproducts/dx164-w/
DX Redundancy
All DX Expanders can be connected in dual-cable redundant mode (32×32) to
compatible hardware.
SQ and AHM don’t support DX redundancy.
dLive S Class Surfaces and MixRacks have integrated redundant DX sockets;
DX1/2 & DX3/4 on the MixRack and DX5/6 on the Surface. They can also be used
with DX Link and/or DX Hub options to add further redundant DX expanders.
dLive C Class Surfaces, C Class MixRacks and Avantis mixers can benefit from DX redundancy via the use of DX Link and/or DX Hub options.
DX Link features a Global Redundancy setting which allows 2x redundant DX
streams (DX1/2 & DX3/4) per module. 
Two DX Hub units can be used to
achieve DX redundancy for up to 4 DX expanders. Both DX Hub units connect to a
single gigaACE I/O module in a dLive or Avantis system: 
DX Cascade Mode
The DX168, DX164-W and DX012 all feature Cascade mode, which allows 2
expanders to be daisy chained together on a single DX or SLink
connection.
Any combination of two DX168/DX164-W/DX012 expanders is supported per socket
in Cascade mode, with all inputs and outputs accessible to the mix engine.
Please refer to the table below for channel mapping when using DX Expanders in Cascade mode.
DX Expander 1 (1-16)
| IN| OUT
---|---|---
DX168| 1-16| 1-8
DX164-W| 1-16| 1-4
DX012| n/a| 1-16
DX Expander 2 (17-32)
| IN| OUT
---|---|---
DX168| 17-32| 17-24
DX164-W| 17-32| 17-20
DX012| n/a| 17-32
Each cable can be 100m allowing 200m between DX socket and 2nd device.
DX32 Expanders do not support Cascade mode.
Redundancy is not possible for DX Expanders in Cascade mode.
DX Distribution Connectivity
The DX Link and DX Hub both offer 128×128 channels of 96kHz audio via 4 DX sockets, each capable of 32×32 channels of audio.
DX Link
DX Link is ideal for live music and theatre applications as well as any
environment where the DX expander(s) are located within 100m of the dLive
Surface, dLive MixRack or Avantis mixer.
-
Installs into any I/O port in the system;
o dLive Surface
o dLive MixRack
o Avantis Mixer -
4 DX Link sockets – 32×32 each
-
Switchable redundant mode (1/2 & 3/4)
-
Up to 5 DX Link in S Class systems
-
Up to 3 DX Link in C Class systems
-
Up to 2 DX Link in Avantis systems
-
128×128 DX channels per DX Link module
Up to 128×128 channels of DX expansion
Socket:| Connects to:|
---|---|---
DX 1| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 2| DX32 or up to 2 of DX168 / DX164-W / DX012 or redundant DX1 connection|
(32×32)
DX 3| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 4| DX32 or up to 2 of DX168 / DX164-W / DX012 or redundant DX3 connection|
(32×32)
Redundancy ON/OFF is global per DX Link module
http://www.allen-heath.com/ahproducts/dx-link/
DX Hub
DX Hub is particularly suited to Install and Commercial Audio applications and
any environment where it is desirable to run a single “trunk” CAT5e cable to
the DX Hub from the dLive or SQ system.
-
Connects to:
o dLive via gigaACE I/O module in dLive MixRack or Surface
o Avantis via SLink socket and/or gigaACE I/O module(s)
o SQ / AHM via SLink -
4 DX Link sockets – 32×32 each
-
Up to 5 DX Hub in S Class systems
-
Up to 3 DX Hub in C Class systems
-
Up to 3 DX Hub in Avantis systems
-
Up to 2 DX Hub in SQ systems
-
Up to 2 DX Hub in AHM systems
-
Use two DX Hubs for redundancy (dLive only)
-
128×128 DX channels per DX Hub module
Up to 128×128 channels of DX expansion
Socket:| Connects to:|
---|---|---
gigaACE| gigaACE I/O Module / SLink socket| (128×128)
DX 1| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 2| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 3| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 4| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
http://www.allen-heath.com/ahproducts/dx-hub/
GX Expander Connectivity
GX4816
The GX4816 is a fixed format expander offering 48 inputs and 16 outputs in a
freestanding or rack-mountable chassis. In addition, 2x DX expansion ports are
provided with the second DX port enabling ME Personal Mixing System
compatibility.
DX1 and DX2 on the GX4816 cannot be used for redundant connections to DX
expanders.
When connected to a ME-U, ME-1 or ME-500, the DX2 port is self-configured as a
40ch, 48kHz output only port for the ME personal mixing system. Channel names
and stereo links are communicated to connected ME systems. The ME patch in SQ
or Avantis will be automatically sent to this port and will override any
output patch to DX2.
ME connection via DX2 is not supported when connected to a dLive or AHM
system.
dLive compatibility with GX4816 requires firmware V1.86 or higher
https://www.allen-heath.com/ahproducts/io-gx4816/
Socket:| Connects to:|
---|---|---
GX| gigaACE I/O Module / SLink socket on SQ/Avantis/AHM| (128×128)
DX 1| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 2| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
or| |
DX 2| ME Personal Mixing System
(not supported when connected to dLive or AHM)| (0x40)
Connecting to dLive
S Class
DM0/DM32/DM48/DM64 Up to 448×448 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
DX 1| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 2| Redundant connection for DX 1 only| (32×32)
DX 3| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 4| Redundant connection for DX 3 only| (32×32)
I/O Port 1| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
I/O Port 2| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
I/O Port 3| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
S3000 / S5000 / S7000
Up to 288×288 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
DX 5| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 6| Redundant connection for DX 5 only| (32×32)
I/O Port 4| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
I/O Port 5| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
C Class
For DX redundancy with C Class hardware use DX Hub or DX Link options
CDM32 / CDM48 / CDM64 Up to 192×192 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
DX 1| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX 3| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
I/O Port 1| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
C1500 / C2500 / C3500 Up to 160×160 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
DX 5| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
I/O Port 4| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
dLive & DX
All dLive Surfaces and MixRacks benefit from integrated DX sockets – dLive
Surfaces offer 1x DX connection and dLive MixRacks offer 2x DX connections
with redundant sockets for dual-cable connection available on S Class
hardware.
If further DX expanders are required, DX Link I/O modules and DX Hub remote hubs can be added to
the system. Both provide 4x DX connections.
A gigaACE I/O module is required for DX Hub connection
A fully expanded S Class system with 5x DX Hub/DX Link and 46x DX168 would add
736 inputs and 368 outputs to the syste(DX Link shown in diagram) 
A fully
expanded C Class system with 2x DX Hub/DX Link and 22x DX168 would add 352
inputs and 176 outputs to the system (DX Link shown in diagram) 
dLive & GX
1x gigaACE I/O module in the Surface or MixRack enables the connection of 1x
GX4816 to a dLive system.
dLive compatibility with GX4816 requires firmware V1.86 or higher
ME connection to the GX4816 via DX2 is not supported when connected to a dLive
system
Additional gigaACE I/O modules can be added for additional GX4816
connections, allowing up to 2x GX4816s on a C Class system, and up to 5x
GX4816s on an S Class system. 
For information on supported DX and ME connections to
a GX, please see the GX Expander Connectivity section.
Connecting to Avantis
Avantis 
Up to 384×384 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
SLink| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX Hub| (128×128)
GX4816| (128×128)
I/O Port 1| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
I/O Port 2| DX Link| (128×128)
gigaACE →DX Hub| (128×128)
gigaACE →GX4816| (128×128)
Avantis & DX
The integrated SLink port on Avantis allows the direct connection of 1x DX32
or up to 2x DX168/DX164-W/DX012 expanders. 
Alternatively, a DX Hub can be connected to the SLink port, or a gigaACE I/O module, to provide 4x DX connections enabling the use of up to 8 DX expanders.
Up to 2x DX Link I/O modules, or gigACE+DX Hub combinations, can be installed
in the I/O ports to further expand DX connectivity up to a maximum of 24x DX
Expanders 
Avantis & GX
The integrated SLink port on Avantis allows the direct connection of 1x
GX4816. An optional gigaACE I/O card can also be used for direct connection to
a GX4816.
Connection of up to 3x GX4816s is supported via the use of both the internal
SLink port and up to 2x gigaACE I/O modules. 
For information on supported DX and ME connections to a GX, please see the GX Expander Connectivity section.
Connecting to SQ
SQ-5 / SQ-6 / SQ-7
Up to 256×256 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
SLink| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX Hub| (128×128)
GX4816| (128×128)
I/O Port| SLink I/O Module →DX32| (32×32)
SLink I/O Module →Up to 2 of DX168 / DX164-W / DX012| (32×32)
SLink I/O Module →DX Hub| (128×128)
SLink I/O Module →GX4816| (128×128)
SQ firmware V1.4 or higher required for DX32 support
SQ & DX
The integrated SLink port on SQ mixers allows the direct connection of 1x DX32
or up to 2x DX168/DX164-W/DX012 expanders. 
Alternatively, a DX Hub can be connected to the SLink port to provide 4x DX
connections enabling the use of up to 8 DX expanders. 
An optional SLink I/O module can be installed in the SQ I/O port
to enable further DX connectivity. 
SQ does not support DX redundancy
DX32 support requires SQ firmware V1.4 or higher
SQ & GX
The integrated SLink port on SQ mixers allows the direct connection of 1x
GX4816. An optional SLink I/O card can also be used for direct connection to a
GX4816. 
The connection of 2x GX4816s is supported via the use of both the internal
SLink port and the optional SLink I/O module. 
For information on supported DX and ME connections to a GX, please see the GX
Expander Connectivity section.
GX4816 support requires SQ firmware V1.4 or higher
Connecting to AHM
AHM-64
Up to 256×256 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
SLink| DX32 or up to 2 of DX168 / DX164-W / DX012| (32×32)
DX Hub| (128×128)
GX4816| (128×128)
I/O Port| SLink I/O Module →DX32| (32×32)
SLink I/O Module →Up to 2 of DX168 / DX164-W / DX012| (32×32)
SLink I/O Module →DX Hub| (128×128)
SLink I/O Module →GX4816| (128×128)
AHM-16, AHM-32
Up to 128×128 channels of DX/GX expansion
Socket:| Connects to:|
---|---|---
I/O Port| SLink I/O Module →DX32| (32×32)
SLink I/O Module →Up to 2 of DX168 / DX164-W / DX012| (32×32)
SLink I/O Module →DX Hub| (128×128)
SLink I/O Module →GX4816| (128×128)
AHM & DX
The integrated SLink port on AHM-64 allows the direct connection of 1x DX32 or
up to 2x DX168/DX164-W/DX012 expanders.
AHM does not support DX redundancy 
Alternatively, a DX Hub can be connected to the SLink port
to provide 4x DX connections enabling the use of up to 8 DX expanders. 
An optional SLink I/O module can be installed in the AHM I/O
port to enable further DX connectivity.
Requires AHM firmware V1.2 or higher. 
AHM & GX
The integrated SLink port on AHM-64 allows the direct connection of 1x GX4816.
The optional SLink I/O card on AHM-16 and AHM-32 can also be used for direct
connection to a GX4816.
ME connection to the GX4816 via DX2 is not supported when connected to an AHM
system. 
The connection of 2x GX4816s is supported on AHM-64 via the use of both the
internal SLink port and the optional SLink I/O module.
Requires AHM firmware V1.2 or higher 
Channel Mapping
DX Link and DX Hub
Please refer to the table below for channel mapping when using DX Expanders in
conjunction with DX Link or DX Hub hardware.
dLive & Avantis: DX Hub & DX Link patching is performed on the I/O page under
the appropriate I/O Port tab.
SQ: DX Hub patching is performed on the I/O page under the SLink or I/O Port
tab.
AHM: DX Hub patching is performed on the Assign page under the I/O Patchbay
tab.
DX168 Non-Redundant
| | IN| OUT
---|---|---|---
Link 1| DX1| 1-16| 1-8
DX1 (Cascade)| 17-32| 17-24
Link 2| DX2| 33-48| 33-40
DX2 (Cascade)| 49-64| 49-56
Link 3| DX3| 65-80| 65-72
DX3 (Cascade)| 81-96| 81-88
Link 4| DX4| 97-112| 97-104
DX4 (Cascade)| 113-128| 113-120
DX32 Non-Redundant
| | IN| OUT
---|---|---|---
Link 1| DX32-1 card 1| 1-8| 1-8
DX32-1 card 2| 9-16| 9-16
DX32-1 card 3| 17-24| 17-24
DX32-1 card 4| 25-32| 25-32
Link 2| DX32-2 card 1| 33-40| 33-40
DX32-2 card 2| 41-48| 41-48
DX32-2 card 3| 49-56| 49-56
DX32-2 card 4| 57-64| 57-64
Link 3| DX32-3 card 1| 65-72| 65-72
DX32-3 card 2| 73-80| 73-80
DX32-3 card 3| 81-88| 81-88
DX32-3 card 4| 89-96| 89-96
Link 4| DX32-4 card 1| 97-104| 97-104
DX32-4 card 2| 105-112| 105-112
DX32-4 card 3| 113-120| 113-120
DX32-4 card 4| 121-128| 121-128
DX168 Redundant
| | IN| OUT
---|---|---|---
Link 1/2| DX1| 1-16| 1-8
Link 3/4| DX3| 65-80| 65-72
DX32 Redundant
| | IN| OUT
---|---|---|---
Link 1/2| DX32-1 card 1| 1-8| 1-8
DX32-1 card 2| 9-16| 9-16
DX32-1 card 3| 17-24| 17-24
DX32-1 card 4| 25-32| 25-32
Link 3/4| DX32-3 card 1| 65-72| 65-72
DX32-3 card 2| 73-80| 73-80
DX32-3 card 3| 81-88| 81-88
DX32-3 card 4| 89-96| 89-96
DX164-W Non-Redundant
| | IN| OUT
---|---|---|---
Link 1| DX1| 1-16| 1-4
DX1 (Cascade)| 17-32| 17-20
Link 2| DX2| 33-48| 33-36
DX2 (Cascade)| 49-64| 49-52
Link 3| DX3| 65-80| 65-68
DX3 (Cascade)| 81-96| 81-84
Link 4| DX4| 97-112| 97-100
DX4 (Cascade)| 113-128| 113-116
DX012 Non-Redundant
| | IN| OUT
---|---|---|---
Link 1| DX1| n/a| 1-16
DX1 (Cascade)| n/a| 17-32
Link 2| DX2| n/a| 33-48
DX2 (Cascade)| n/a| 49-64
Link 3| DX3| n/a| 65-80
DX3 (Cascade)| n/a| 81-96
Link 4| DX4| n/a| 97-112
DX4 (Cascade)| n/a| 113-128
DX164-W Redundant
| | IN| OUT
---|---|---|---
Link 1/2| DX1| 1-16| 1-4
Link 3/4| DX3| 65-80| 65-68
DX012 Redundant Example
| | IN| OUT
---|---|---|---
Link 1/2| DX1| n/a| 1-16
Link 3/4| DX3| n/a| 65-80
GX4816 – DX/ME Sockets
Please refer to the table below for channel mapping when using DX Expanders in
conjunction with a GX4816.
dLive: GX4816 patching is performed on the I/O page under the appropriate
I/O Port tab.
Avantis & SQ: GX4816 patching is performed on the I/O page under the
SLink or I/O Port tab.
AHM: GX4816 patching is performed on the Assign page under the I/O
Patchbay tab.
If a ME Personal Mixing system is connected to the DX2 socket on the GX4816,
patching to the ME system is performed on the I/O page under the ME tab (all
mixers).
Connection of a ME system via DX2 is not supported on dLive and AHM systems.
GX4816 Local I/O
| IN| OUT
---|---|---
Analogue| 1-48| 1-16
DX168 Non-Redundant
| | IN| OUT
---|---|---|---
DX 1| DX1| 65-80| 65-72
DX2 (Cascade)| 81-96| 81-88
DX 2| DX2| 97-112| 97-104
DX2 (Cascade)| 113-128| 113-120
DX32 Non-Redundant
| | IN| OUT
---|---|---|---
DX 1| DX32-3 card 1| 65-72| 65-72
DX32-3 card 2| 73-80| 73-80
DX32-3 card 3| 81-88| 81-88
DX32-3 card 4| 89-96| 89-96
DX 2| DX32-4 card 1| 97-104| 97-104
DX32-4 card 2| 105-112| 105-112
DX32-4 card 3| 113-120| 113-120
DX32-4 card 4| 121-128| 121-128
DX164-W Non-Redundant
| | IN| OUT
---|---|---|---
DX 1| DX1| 65-80| 65-68
DX1 (Cascade)| 81-96| 81-84
DX 2| DX2| 97-112| 97-100
DX2 (Cascade)| 113-128| 113-116
DX012 Non-Redundant
| | IN| OUT
---|---|---|---
DX 1| DX1| n/a| 65-80
DX1 (Cascade)| n/a| 81-96
DX 2| DX2| n/a| 97-112
DX2 (Cascade)| n/a| 113-128
Networking
The DX protocol is a Fast Ethernet point-to-point connection (100BASE-TX, IEEE
802.3u) and is Layer 2 compliant. Layer 2 network switches and media
converters can be used, provided they support Fast Ethernet connections.
gigaACE, utilised by DX Hub and GX4816, is a Gigabit Ethernet point-to-point
connection (1000BASE-T, IEEE 802.3ab), Layer 2 compliant. Layer 2 network
switches and media converters can be used, provided they support Gigabit
Ethernet connections.
General Rules
Layer 2.5 and higher protocols including Spanning Tree, Tagged Egress Packets,
and Broadcast Storm Protection can cause interruption to audio data or audible
clicks. Smart / managed switches may allow turning off Layer 3 or 4 functions,
but as a general rule we recommend using Layer 2 devices only.
Note that no other network device should be plugged into a switch carrying
gigaACE or DX audio unless a dedicated VLAN is set up.
Parallel connection of multiple DX Expanders on a switch is not possible.
When using an Ethernet switch or media converter, we suggest you check for
errors and test for functionality and reliability before putting your system
into service.
Cables
STP CAT5 (or higher) cables are required for connections to DX expanders.
STP CAT5e (or higher) cables are required for connections to DX Hub and GX4816
UTP cables are not supported
The maximum length of each cable is 100m. With 2 DX expanders in Cascade mode
this allows a distance of up to 200m between the SQ/Avantis/dLive and the
second DX expander. Using a DX Hub allows for an additional 100m cable run
between the gigaACE module/SQ and the DX Hub giving a maximum distance of 300m
between the MixRack and the second DX expander.
Allen & Heath can supply a number of network cables – details available on our
website. 
VLANs
It takes some trial and error to configure a VLAN for use with DX or gigaACE,
and the actual configuration depends on the specific switch in use. In our
tests, we also found that many switches do not handle the gigaACE / DX packets
with the time accuracy our clock requires, particularly over trunk lines and
SFP modules, resulting in sync errors and in some cases, audible glitches.
Thus, use of VLANs is not officially supported and the notes below are given
as a guideline only.
One VLAN is needed for each point-to-point connection i.e. you cannot have
more than two DX / gigaACE devices on the same VLAN. No other traffic should
be present on this VLAN.
The ports should be forced to 100Mbps (Fast Ethernet) for DX / ACE / dSNAKE,
or Gigabit Ethernet for gigaACE – we had mixed experiences with auto-
negotiating ports. The ports need full 100Mbps / 1000Mbps bandwidth. This
means that, in order to have a gigaACE VLAN on a switch, the trunk between
switches must be higher than Gigabit (10 Gigabit recommended).
ALL Layer 2.5 and higher protocols must be disabled, as mentioned above.
Essentially any packet on the VLAN other than audio transport is likely to
cause audible glitches. The VLAN should be fully transparent to Layer 2
traffic, with no extra packet.
Also note that dLive firmware prior to V1.8 had gigaACE fixed to VLAN 1, which
would often conflict with the management VLAN on some switches. The VLAN tag
was been removed in V1.8 allowing user tagging of gigaACE traffic.
Fibre optics
Most standard Cat5 to F.O. converters will work, provided they support the
required connection type / speed (see above).
DX & GX System Guide ISS_5
References
- Allen & Heath - Heard Everywhere
- DX Hub - Allen & Heath
- Everything I/O - Allen & Heath
- DX164-W - Allen & Heath
- DX168 - Allen & Heath
- DX32 - Allen & Heath
- Audio Networking - Allen & Heath
- GX4816 - Allen & Heath
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