Radius and Edge Expansion Cards
- Expand I/O Capacity and Add Functionality
- Analog Audio : 4 Channel Input | 4 Channel Output
- Digital Audio : 2 Stereo Pair Channel Input | 2 Stereo Pair Channel Output
- AEC : 4 Channel Input
- Telephone : 2 Line Analog | 2 Line VoIP
- USB : 1×1, 2×2, and 8×8 Modes

4 Channel Analog Input Card
- Mic and/or line level inputs.
- 4 channels per card.
- +48v phantom power @10mA.
- Signal matching. 5 analog gain settings with +/-24dB of digital trim.
- Extended dynamic range A/D converters. >115 dB.
- Easy wiring. 3.81mm terminal blocks, 12 position plugs with strain relief pull tabs
- Field swappable by qualified technicians.
4 Channel Analog Output Card
- Analog line outputs.
- 4 channels per card.
- High output levels for long cable runs. Up to +24 dBu.
- Digital trim. +12dB down to full off.
- Extended dynamic range D/A converters. >117 dB.
- Easy wiring. 3.81mm terminal blocks, 12 position plugs with strain relief pull tabs.
- Field swappable by qualified technicians.
4 Channel Digital Input Card
- 4 channels (2 stereo pairs), balanced S/PDIF or unbalanced AES.
- Pro or consumer – AES/EBU or S/PDIF.
- Connect to any source – sample rate converts 12 to 192 kHz input signal to 48k internal clock.
- Level matching – +/-24dB digital trim.
- Field swappable by qualified technicians.
4 Channel Digital Output Card
- 4 channels (2 stereo pairs), balanced S/PDIF or unbalanced AES.
- Pro or consumer – AES/EBU or S/PDIF.
- Flexible output sample rates – defaults to 48kHz or can be externally clocked from 12 to 192kHz.
- Output trim – +12dB to full off.
- Easy wiring – 3.81mm terminal blocks, 12 position plugs with strain relief pull tabs.
- Field swappable by qualified technicians.
4 Channel AEC Input Card
- Wideband dedicated processing.
- Zero-latency direct outputs and discrete reference inputs per AEC channel.
- AEC processing available to the card’s direct inputs or internally routed sources.
- 11 mS AEC latency, up to 300 mS tail length, and greater than 100 dB/S convergence time.
- Field swappable by certified technicians.
2 Line Analog Telephone Interface Card
- 2 PSTN (POTS) lines – telco connections via RJ11.
- Multiple applications – teleconferencing, paging, remote monitoring, broadcast.
- Deskset functionality – answer, dial, redial, speed-dial, ignore (DND), decode (DTMF), ID callers, detect progress, monitor line status and faults, + more.
- Compliance – EN 55103-1, EN 55103-2, FCC Part 15, FCC Part 68, RoHS, FCC 47-CFR Part 68, ACTA TIA-968-B, TIA-1096, IC CS-03 Part I, DC-01(E).
- Field swappable by qualified technicians.
Note: The 2 Line Analog Telephone Interface Card is only for use in North America at this time.
2 Line VoIP Interface Card
- Natively integrates with Cisco, AVAYA, and Asterisk SIP-based call platforms. Supports both narrow and wide-band audio codecs and is capable of a broad range of telephony functions including dial, hold, resume, transfer, do not disturb, and conference.
- A diversity of applications – well suited for conferencing, paging, remote monitoring, and broadcast.
- Best-in-class deployment and administration – easy to deploy and manage. The intuitive configuration software is accessible from both the AV and VoIP LANs giving AV integrators and IT/VoIP administrators easy access for configuration and maintenance.
- Market-leading open standards interoperability – designed for enhanced interoperability while leveraging and complementing existing IT investments, the card delivers high-definition voice quality and a superior unified communications experience.
- Multiple Control Options – SymVue application builder and extensive third-party control support allow for intuitive end-user operation while reducing the amount of time needed to develop application specific user interfaces. An expanded series of Crestron certified control modules, including a VoIP Dialer Module, can be found in the Crestron Application Market.
USB Audio Card
- Adds up to 16 channels of USB audio I/O to a Radius DSP, or up to 64 channels to an Edge DSP, bridging computer-based soft codecs or recording and playback software to the expansive Dante™ network audio ecosystem.
- Multiple distinct modes of operation including two speakerphone modes for conferencing, along with a 2×2 and 8×8 line I/O mode for multitrack recording and playback.
- Speakerphone and 2×2 line modes are class 1 USB (driverless) for quick and problem free plug-and-play connectivity and provide the ability to utilize a soft codec’s AEC or disable it in favor of Symetrix’ award-winning AEC.
- 8×8 line I/O mode utilizes Class 2 USB. Windows ASIO drivers are included.
- A high-retention Type B USB connection provides a robust and standard direct connection between the DSP and computer.
Hover over image to enlarge

General Specifications
Number of Inputs | Four (4) switchable balanced mic or line level. |
Connectors | 3.81 mm terminal blocks. |
Nominal Input Level | +4 dBu with 20 dB of headroom. |
Maximum Input Level | +23 dBu |
Mic Pre-amp Gain | 0, 11.8, 24, 44 or 54 dB switchable with ± 24 dB trim. |
Mic Pre-Amp EIN | < -127dB with 150 Ohm source impedance. |
CMRR | > 76 dB @ 1 kHz, unity gain. |
Input Impedance | 8k Ohms balanced, 4k Ohms unbalanced. |
Phantom Power (per input) | +48 VDC @ 10 mA maximum. |
Dynamic Range | > 115 dB, A-weighted. |
THD + Noise | < -94 dB, unweighted; 1 kHz @ +22 dBu with 0 dB gain. |
Latency | 0.28 mS |
Mechanical Data
Shipping Weight | 1 lbs. (0.45 kg) |
Certifications or Compliance | EN 55103-1, EN 55103-2, FCC Part 15, RoHS. |
Architect and Engineer Specifications: SymNet 4 Channel Analog Input Card.
The device shall provide four analog mic/line inputs to an EDGE or RADIUS AEC frame that are adjustable from line to mic level with coarse gain, fine trim and phantom power. Up to four of these devices may be installed in a single EDGE frame for up to sixteen channels of local input and up to one of these devices may be installed in a single RADIUS AEC frame for up to four channels of local input. Levels, phantom powers, signal inversions and mutes shall be controllable via software. Audio inputs shall be accessed via rear panel 3.81 mm terminal block connectors.
Audio conversion shall be 24-bit, 48 kHz. The dynamic range shall not be lower than 115 dB, A-weighted with a maximum input level of +23 dBu.
The device shall comply with CE and FCC Part 15 emissions limits. The device shall be RoHS compliant. The mounting plate shall be constructed of cold rolled steel, and mount into a SymNet Radius AEC or EDGE frame I/O card slot. The device shall be a Symetrix SymNet 4 Channel Analog Input Card.
General Specifications
Number of Outputs | Four (4) balanced line level. |
Connectors | 3.81 mm terminal blocks. |
Nominal Output Level | +4 dBu with 20 dB of headroom. |
Maximum Output Level | +24 dBu (+22.8 dBu into a 2k Ohm minimum load). |
Output Impedance | 300 Ohms balanced, 150 Ohms unbalanced. |
Dynamic Range | > 117 dB, A-weighted. |
THD + Noise | < -95 dB, unweighted; 1 kHz @ +22 dBu with 0 dB gain. |
Latency | 0.60 mS |
Mechanical Data
Shipping Weight | 1 lbs. (0.45 kg) |
Certifications or Compliance | EN 55103-1, EN 55103-2, FCC Part 15, RoHS. |
Architect and Engineer Specifications: SymNet 4 Channel Analog Output Card.
The device shall provide four analog line outputs to an EDGE or RADIUS AEC frame that are adjustable with fine trim. Up to four of these devices may be installed in a single EDGE frame
for up to sixteen channels of local output and up to one of these devices may be installed in a single RADIUS AEC frame for up to four channels of local output. Levels and mutes shall be
controllable via software. Audio outputs shall be accessed via rear panel 3.81 mm terminal block connectors.
Audio conversion shall be 24-bit, 48 kHz. The dynamic range shall not be lower than 117 dB, A-weighted with a maximum output level of +24 dBu.
The device shall comply with CE and FCC Part 15 emissions limits. The device shall be RoHS compliant. The mounting plate shall be constructed of cold rolled steel, and mount into a SymNet Radius AEC or EDGE frame I/O card slot. The device shall be a Symetrix SymNet 4 Channel Analog Output Card.
General Specifications
Number of Inputs | Two (2) pairs multi-channel digital stream inputs, in either AES or S/PDIF (4 Channels total; 2 per stream). |
Connectors | 3.81 mm terminal blocks. |
Nominal Input Level | -20 dBFS (+4 dBu with 20 dB of headroom). |
Maximum Input Level | 0 dBFS (+24 dBu) |
Input Impedance | 110 Ohms (AES), 75 Ohms (S/PDIF). |
Dynamic Range | > 128 dB, unweighted. |
THD + Noise | < -125 dB, unweighted. |
Nominal Sample Rate | 48 kHz. |
Sample Rate Sync Range | 12 to 192 kHz. |
Latency | 2.1 mS @ 48 kHz. |
Mechanical Data
Shipping Weight | 1 lbs. (0.45 kg) |
Certifications or Compliance | EN 55103-1, EN 55103-2, FCC Part 15, RoHS. |
Architect and Engineer Specifications: SymNet 4 Channel Digital Input Card.
The device shall provide two pairs of digital inputs (4 channels total) to an EDGE or RADIUS AEC frame that are adjustable with fine trim and selectable in format between AES or S/PDIF.
Up to four of these devices may be installed in a single EDGE frame for up to sixteen channels of local input and up to one of these devices may be installed in a single RADIUS AEC frame for up to four channels of local input. Levels, mutes, inversions and formats shall be controllable via software. Audio inputs shall be accessed via rear panel 3.81 mm terminal block connectors.
Audio conversion shall be 24-bit, 48 kHz with ability to accept 12 to 192 kHz using a sample rate conversion. The dynamic range shall not be lower than 128 dB, unweighted with a maximum input level of 0 dBFS (+24 dBu).
The device shall comply with CE and FCC Part 15 emissions limits. The device shall be RoHS compliant. The mounting plate shall be constructed of cold rolled steel, and mount into a SymNet Radius AEC or EDGE frame I/O card slot. The device shall be a Symetrix SymNet 4 Channel Digital Input Card.
General Specifications
Number of Outputs | Two (2) pairs multi-channel digital stream inputs, in either AES or S/PDIF (4 Channels total; 2 per stream). |
Connectors | 3.81 mm terminal blocks. |
Nominal Output Level | -20 dBFS (+4 dBu with 20 dB of headroom). |
Maximum Output Level | 0 dBFS (+24 dBu) |
Output Impedance | 110 Ohms (AES), 75 Ohms (S/PDIF). |
Dynamic Range | > 128 dB, unweighted. |
THD + Noise | < -125 dB, unweighted. |
Nominal Sample Rate | 48 kHz. |
Sample Rate Sync Range | 12 to 192 kHz. |
Latency | 2.1 mS @ 48 kHz. |
Mechanical Data
Shipping Weight | 1 lbs. (0.45 kg) |
Certifications or Compliance | EN 55103-1, EN 55103-2, FCC Part 15, RoHS. |
Architect and Engineer Specifications: SymNet 4 Channel Digital Output Card.
The device shall provide two pairs of digital outputs (4 channels total) to an EDGE or RADIUS AEC frame that are adjustable with fine trim and selectable in format between AES or S/PDIF. Up to four of these devices may be installed in a single EDGE frame for up to sixteen channels of local output and up to one of these devices may be installed in a single RADIUS
AEC frame for up to four channels of local output. Levels, mutes, clock sources and formats shall be controllable via software. Audio outputs shall be accessed via rear panel 3.81 mm terminal block connectors.
Audio conversion shall be 24-bit, 48 kHz with ability to accept 12 to 192 kHz using an external clock source. The dynamic range shall not be lower than 128 dB, unweighted with a maximum output level of 0 dBFS (+24 dBu).
The device shall comply with CE and FCC Part 15 emissions limits. The device shall be RoHS compliant. The mounting plate shall be constructed of cold rolled steel, and mount into a SymNet Radius AEC or EDGE frame I/O card slot. The device shall be a Symetrix SymNet 4 Channel Digital Output Card.
General Specifications
Number of Inputs | Four (4) acoustic echo cancellation. |
Connectors | 3.81 mm terminal blocks. |
Nominal Input Level | +4 dBu with 20 dB of headroom. |
Maximum Input Level | +23 dBu. |
Mic Pre-amp Gain | 0, 11.8, 24, 44 or 54 dB switchable with ± 24 dB trim. |
Mic Pre-amp EIN | <-127 dB with 150 Ohm source impedance. |
CMRR | > 76 dB @ 1 kHz, unity gain. |
Input Impedance | 8k Ohms balanced, 4k Ohms unbalanced. |
Phantom Power | +20 VDC @ 10 mA maximum. |
A/D Dynamic Range | < 115 dB, A-weighted. |
A/D Latency | 0.28 mS (direct), 11 mS (AEC enabled). |
A/D THD + Noise | <-94 dB, unweighted. |
Tail Length | > 250 mS. |
Convergence Time | > 100 dB/S. |
Mechanical Data
Shipping Weight | 1 lbs. (0.45 kg). |
Certifications or Compliance | EN 55103-1, EN 55103-2, FCC Part 15, RoHS. |
Architect and Engineer Specifications: SymNet 4 Channel AEC Input Card.
The device shall provide four acoustic echo cancellation inputs to an EDGE or RADIUS AEC frame with coarse gain, fine trim and phantom power. Up to four of these devices may be installed in a single EDGE frame for up to sixteen channels of local input and up to one of these devices may be installed in a single RADIUS AEC for up to four channels of local input. Levels, phantom powers, signal inversions and mutes shall be controllable via software. Audio inputs shall be accessed via rear panel 3.81 mm terminal block connectors.
Audio conversion shall be 24-bit, 48 kHz. The dynamic range shall not be lower than 115 dB, A-weighted with a maximum input level of +23 dBu.
The device shall comply with CE and FCC Part 15 emissions limits. The device shall be RoHS compliant. The mounting plate shall be constructed of cold rolled steel, and mount into a SymNet Radius AEC or EDGE frame I/O card slot. The device shall be a Symetrix SymNet 4 Channel AEC Input Card.
General Specifications
Telco “Line” Connector | RJ11. Format: POTS (plain old telephone service) or analog extension from a PBX. |
Telco “Set” Connector | RJ11. Format: POTS (plain old telephone service) or analog extension from a PBX. Note: Relay bridged to Line port with option in software to isolate based on hook status. |
Frequency Response | 250 Hz to 3.3 kHz ±1.0 dB. |
THD+Noise | < 0.3%. |
Signal to Noise Ratio | > 62 dB. |
LEC Tail Time | 32 mS. |
Null | 55 dB nominal. |
Compliance | G.165, G.168 compliant. |
Tx Level | -10.0 dBm RMS average; +3.2 dBm maximum. |
Rx Level | -10.0 dBm RMS average; +3.2 dBm maximum. |
Transhybrid Loss | > 48 dB with LEC enabled. |
Ringer Equivalency Number | 0.0 dB. |
Mechanical Data
Shipping Weight | 1 lbs. (0.45 kg). |
Certifications or Compliance | EN 55103-1, EN 55103-2, FCC Part 15, FCC Part 68, RoHS, FCC 47 CFR Part 68, ACTA TIA-968-B, TIA-1096, IC CS-03 Part I, DC-01(E). |
This device is in compliance with the Federal Communications Commission’s (FCC) Rules and Regulations 47 CFR Part 68, and the Administrative Council on Terminal Attachments
(ACTA) – adopted technical criteria, TIA-968-B – Telephone Terminal Equipment, Technical Requirements For Connection of Terminal Equipment To The Telephone Network, August 2009 and TIA-1096.
This device meets the Industry Canada technical specifications CS-03 Part I for terminal equipment and related access arrangements intended for direct connection to analogue wireline facilities and DC-01(E) for the declaration of conformity and registration of terminal equipment.
Architect and Engineer Specifications: 2 Line Analog Telephone Interface Card.
This device shall provide two analog telephone interface inputs to an EDGE or RADIUS AEC frame with standard PSTN telephony functions. Up to four of these devices may be installed in a single EDGE frame for up to eight channels of local input and up to two of these devices may be installed in a single RADIUS AEC for two channels of local input. Levels, mutes, inversions and formats shall be controllable via software. Audio inputs shall be access via rear panel RJ11 (6P6C) connectors.
Audio conversion shall be 24-bit, 48 kHz. The dynamic range shall not be lower than 115 dB, A-weighted with a maximum input level of +23 dBu.
The device shall comply with CE, FCC Part 15 emissions limits, and FCC Part 68. The device shall be RoHS compliant. The mounting plate shall be constructed of cold rolled steel, and mount into a SymNet RADIUS AEC or EDGE frame I/O card slot. The device shall be a Symetrix 2 Line Analog Telephone Interface Card.
General Specifications
Connector | RJ45 |
Ethernet Cable | Standard CAT5, maximum device to device length = 100 meters. |
Ethernet Interface | 10/100 Base-T. |
Mechanical Data
Shipping Weight | 1 lbs. (0.45 kg) |
Certifications or Compliance | UL 60065, cUL 60065, IEC 60065, EN 55103-1, EN 55103-2, FCC Part 15, RoHS, WEEE. |
What Ships in the Box | SymNet I/O card, card bracket, 2 black 4-40 Phillips head screws, 3 stainless steel 4-40 Phillis head screws, a quick start guide. Field swappable by certified technicians. |
Architect and Engineer Specifications: 2 Line VoIP Interface Card.
This device shall provide two VoIP lines to an Edge, RADIUS AEC or RADIUS 12×8 EX frame with standard SIP telephony functions. Up to four of these devices may be installed in a single Edge frame for up to eight VoIP lines and up to one of these devices may be installed in a single RADIUS AEC or RADIUS 12×8 EX for up to two VoIP lines. VoIP network connection shall be accessible via a rear panel RJ45 Ethernet connector with configuration available both via the VoIP LAN interface and the AV LAN interface.
The device shall comply with CE and FCC Part 15 emissions limits. The device shall be RoHS and WEEE compliant and carry a three-year manufacturer’s warranty. The mounting plate shall be constructed of cold rolled steel, and mount into a Edge, RADIUS AEC, or RADIUS 12×8 EX frame I/O card slot. The device shall be a Symetrix 2 Line VoIP Interface Card.
General Specifications
Interface | 2.0 |
Class | Audio Device Class 1.0 and 2.0. |
Mode | Speakerphone (disable Computer AEC) 1x1, Speakerphone (allow Computer AEC) 1x1, Line 2x2, or Line 8x8. |
Connector | One (1) high-retention Type B female. |
Sample Rate | Internally 48 kHz. Externally, 48 KHz in legacy modes (speakerphones, 2x2), 16 KHz to 96 KHz in 8x8 mode. |
Bit Depth | 16-bit in legacy modes (speakerphones, 2x2), 16 or 24-bit in 8x8 mode. |
Environmental | Environmental specifications same as hosting unit. |
Inputs | Gain, Invert, Mute, Meter, Channel Name. |
USB Status | Connected, Streaming (Active). |
Outputs | Gain, Mute, Meter, Channel Name. |
Mechanical Specifications
Shipping Weight | 1 lbs. (0.45 kg). |
Certifications or Compliance | EN 55103-1, EN 55103-2, FCC Part 15, RoHS. |
Form Factor | Standard Symetrix DSP I/O card form factor. |
What Ships in the Box | Symetrix I/O card, card bracket, 2 black 4-40 Phillips head screws, 3 stainless steel 4-40 Phillis head screws, a quick start guide. Field swappable by certified technicians. |
Architect and Engineer Specifications: USB Audio Card.
The device shall provide a USB audio interface to EDGE, RADIUS AEC or RADIUS 12×8 EX frames with up to 16 to 64 channels in four configurable modes of operation: Speakerphone (disable Computer AEC) 1×1, Speakerphone (allow Computer AEC) 1×1, Line 2×2 (all Class 1), or Line 8×8 (Class 2). Up to four of these devices may be installed in a single EDGE frame for up to 64 channels and up to one of these devices may be installed in a single RADIUS AEC or RADIUS 12×8 EX for up to 16 channels. USB connection shall be accessible via a rear panel Type B high-retention connector. Interface configuration is via the provided designer software application that operates on a Windows computer, with network interface installed, running Windows® 7 or higher operating system. Computer connection for configuration shall be via the hosting device’s rear panel Ethernet connector.
The device shall comply with CE and FCC Part 15 emissions limits. The device shall be RoHS and WEEE compliant and carry a three-year manufacturer’s warranty. The mounting plate shall be constructed of cold rolled steel, and mount into a Symetrix EDGE, RADIUS AEC, or RADIUS 12×8 EX frame expansion card slot. The device shall be a Symetrix USB Audio Card.