Security and Communication

ET 908H
Hybrid modules for integration in housings and panels

High OpenDuplex® IoIP® and

volume technology SIP

The perfect built-in solution Features and highlights

The hybrid modules ET 908H (RJ45 jacks mounted horizontally) and – Built-in inputs and outputs for connection of e.g. door openers – can
ET 908H-1 (RJ45 jacks mounted vertically) have been deve­loped for be extended via expansion plug
­installation in existing housings or for construction of special ­Intercom – Hybrid modules for custom designed stations
stations. As they support both IoIP connections and SIP solutions (hybrid), – Special audio functions ensure superior speech quality in any situation
the hybrid modules can easily be integrated into any Voice over IP system
– Sound output or playback of pre-recorded messages can be used to
as well as any existing Commend Intercom system. The ­desired opera-
provide information and reassurance to callers
tion mode is selected via the configuration software.
– Ready for connection of induction loop systems, which enable
­persons wearing hearing aids with an induction loop to receive
Applications for the hybrid modules are all kinds of call and emergency
­Intercom audio signals in clear, uninterrupted quality
call stations, where the stations are built-in and only the external call but-
tons are used. This means, special solutions for e.g. emergency call pil-
lars, elevator cabins, ­ticketing machines or barriers at entrances and exits
can be created, which optimally satisfy function and optical appearance
of the customer specifications.

Furthermore, the hybrid modules are perfectly suited for use as door sta-
tions at entrance areas and gateways due to two integrated relay ­outputs.

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 Security and Communication

Passion for Audio

by Commend

Ultimate speech intelligibility in any situation

OpenDuplex® with HD voice and enhanced HD Voice by Commend enables natural,
hands-free talking and listening – as crystal clear and natural as a face-to-face
conversation.

IVC
Natural Intelligent Volume High Background noise Loudspeaker/microphone
communication Control volume suppression surveillance

Audio // Basics Audio // Functions IoIP SIP

Enhanced HD Voice by Commend transfers the au- Dynamic background noise suppression virtually
eHD Voice
dio signal at a bandwidth of 16 kHz, thus capturing eliminates all ambient noise
(IoIP)
the entire frequency spectrum of the human voice.
Loudspeaker-microphone surveillance – ensures the
HD Voice HD Voice by Commend transfers the audio signal at availability of the Intercom station while reducing the
(SIP) a bandwidth of 7 kHz need for manual verification of its functionality
Amplifier Highly efficient class-D amplifier with 10 W Audio monitoring – fully automated emergency calls trig­
g­ered by defined noise levels for more security
Peer-to-peer audio – reduces network and server load to
Learn more ensure efficient use of resources

audio.commend.com Audio recording and lip synchronous audio/video record-

ing of conversations for documentation and evidence 1)

keeping purposes
Conference call function for simultaneous talking with
multiple conversation partners
Speech activity detection senses when calls are
finished (no microphone signal) and terminates the con-
nection automatically
Simplex mode for applications requiring controlled
communication – e.g. for security solutions based on the
“push-to-talk/release-to-listen” method
OpenDuplex® for natural, hands-free communication

IVC (Intelligent Volume Control) automatically adjusts the

­device’s volume setting to the ambient noise level

Public address functions 2)

1) Audio recording option on a compatible VMS via ONVIF Profile S.

2) Public address functions via multicast or ONVIF Profile S announcements from a compatible VMS.

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 Security and Communication

ET 908H
Technical specifications

Technical data
Microphone input: possibility for connection of an electret condenser
microphone or a dynamic microphone
electret condenser microphone: nominal −43 dB/Pa
(feeding voltage: 2.5 V at 3.3 kΩ)
Loudspeaker output: 10 W at 4 Ω/6 W at 8 Ω Line length in LAN
max. 6.3 Veff (volume level “11”)
The maximum line length of Cat. 5 cabling in a LAN is 100 m (328 ft) – e.g.
Ext. microphone, loudspeaker: possibility for connection of e.g. a headset/handset from switch to ET 908H.
EP output: max. 880 mVeff (volume level “11”) , Ri = 200 Ω
EM input, nominal level: 14 mV on 3.3 kΩ
(feeding voltage 2.5 V)
Call button: possibility for connection of 3 single buttons or a keypad Extent of supply
External LED: possibility for connection of an RGB-LED – Hybrid module
Inputs: 3 inputs for floating contacts – Mounting kit (4 fixing spacers with M3 thread, red LED)
(IoIP: detection of 5 input states) – MIC 480 (ET 908HMI and ET 908HMI-1 only)
Outputs: 2 relay outputs (switch-over contacts) – Claiming code
max. 60 W (DC)/37.5 VA (AC) – Open source compliance information
max. 2 A
max. 60 VDC/30 VAC – Short reference
expected life: min. 5 x 104 (2 A), 105 (1 A)
Line input: for feed-in of audio (e.g. music, radio conference)
nominal level: 0 dBu (0.775 V) at 10 kΩ System requirements
IoIP audio bandwidth: 16 kHz
IoIP
SIP audio bandwidth: 7 kHz
Intercom Server
Operating temperature range: −40 °C to +70 °C (−40 °F to +158 °F) – GE 800 (min. PRO 800 6.3) with G8-IP (min. version 6.6A) or
Storage temperature range: −40 °C to +70 °C (−40 °F to +158 °F) – GE 300 (min. PRO 800 6.3) with G3-IP (min. version 6.6A) or
Relative humidity: up to 95%, not condensing – IS 300/G8-IP-32 (min. PRO 800 6.3, min. version 6.6A) or
Connection: spring clamp terminals – S3/S6/VirtuoSIS (min. version 7.1)
(conductor cross-section: 0.2 – 1.5 mm2) Configuration software
expansion plug, e.g. for EB2E2AHE – CCT 800 (min. version 7.1)
IP uplink: shielded RJ45 modular jack – IP Station Config (included in setup of CCT 800)
IP downlink: shielded RJ45 modular jack
Power supply: DC power supply: 24 VDC (15 – 28 VDC),
SIP
max. 1.0 A @ 15 V, max. 0.54 A @ 28 V
PoE (Power over Ethernet): IEEE 802.3af/Class 0, – S3/S6/VirtuoSIS (min. version 7.1) or
IEEE 802.3at/Type 1 – Compatible SIP server (see compatibility list “Interoperability SIP”) or
Power consumption idle 2.6 W, max. 15 W – Serverless operation
(depending on configuration)
Device class: ES1, PS2 as per IEC/EN 62368-1 Device firmware
Network cabling: min. shielded Cat. 5 – IoIP-Device (min. version 7.2)
Protocols (IoIP): IPv4, UDP, DHCP, RTP, RTCP, SNMPv2c, SNTPv4 – SIP Series (min. version 3.8.1, build 61)

Protocols (SIP): IPv6, IPv4, TCP, UDP, HTTP (RFC 2617, RFC 3310),
ATTENTION
RTP (RFC 3550), TLS, SRTP, RTCP, DHCP, STUN,
TFTP, SDP (RFC 2327), SIP (RFC 3261), SNMPv2, Downgrading to firmware version SIP Series 3.9 build 24 or lower is not
URI (RFC 2396), DTMF Decoding (RFC 2876, s­upported.
RFC 2833), SIP User Agent (UDP RFC 3261),
SIP Refer Method (RFC 3515)
Codecs (SIP): G.711 a-Law, G.711 μ-Law, G.722
Data rate: 2 x 10/100 MBit/s (Full/Half Duplex) auto MDIX
Dimensions (W x H x D): ET 908H: 65 x 130 x 18 mm (2.56 x 5.12 x 0.71 in)
ET 908H-1: 65 x 130 x 22 mm (2.56 x 5.12 x 0.87 in)
Weight: approx. 170 g (0.37 lbs)

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 Security and Communication

Requirements to the network for use as SIP device

Ports
– The configuration via the web interface is done via TCP port 80 (cannot be configured).
– The communication from the SIP device to the SIP server is done via the following ports (both are configurable):
– SIP: UDP port 5060
– RTP: UDP port 16384 (incoming)

Requirements to the network for use as IoIP device

IP addresses and ports
– For the ET 908H, the DHCP functionality is available. If DHCP is not used, the ET 908H must have a fixed IP address.
– In case of a changing public IP address, dynamic registration of an ET 908H is possible.
– Communication from the program IP Station Config is done via port 16399 (cannot be configured).
– Communication from the ET 908H to the Intercom Server (UDP protocol) is done via port 16400 (configurable).

QoS requirements
– One-way delay max. 100 ms
– Delay jitter max. 50 ms
– 0% packet loss for perfect audio quality

Bandwidth
For further information on bandwidth, see guideline “IoIP Technology“.

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 Security and Communication

ET 908H
Installation instructions Safety instructions
– This device shall be installed or replaced by trained and qualified personnel
only.
– Conductive housing and mounting plates must be connected to protective
earth.
Dimensions – Before using this device, ensure all cables are connected correctly and are
not damaged.
Measuring units in mm (in), not to scale!
– Disconnect the DC power and all Ethernet cables for any maintenance of
the device.
ET 908H
15 (0.59) – Allow the device to cool down completely before touching any parts.
18 (0.71) – Install or store this device out of the reach of children and do not allow
persons unfamiliar with the device and these instructions to handle and
operate the device.
8 (0.31)

– All connected circuits shall fulfil the following requirements:

– Safety Extra Low Voltage (SELV) and Limited Power Source (LPS) ac-
ET 908H-1 cording to IEC/EN 60950-1 or
– ES1, PS2 circuits and Annex Q (Limited Power Source) according to
IEC/EN/UL 62368-1
18.5 (0.73)
21.5 (0.85)

– All changes or modifications not expressly approved by the party

­responsible for compliance could void the user’s authority to operate the
equipment.
8 (0.31)

Mounting instructions
– The device must be protected against dust, dirt, humidity and eventual
environmental influences. The housing must protect against ES1­/PS2
25 (0.99)

­circuits .­
35 (1.38)

– Use shielded Ethernet cables only.

– Ensure a minimum distance of 8 mm (0.31 in) to the housing or mount-
ing plate (e.g. using spacer pins included in the extent of supply).
– The max. diameter for spacer pins is 9.1 mm (0.36 in) for plastic and 5.6
mm (0.22 in) for conductive materials.
– This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interfer-
ence when the equipment is operated in a commercial environment. This
equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may
130 (5.12)
80 (3.15)

60 (2.36)

cause harmful interference to radio communications. Operation of this

equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his
own expense.

ø3,2 (4x)
(0.13)

ø4 (4x)
(0.16)

55 (2.17) 5
65 (2.56) (0.2)

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 Security and Communication

Connection
NOTE
The connection diagram to the left shows a hybrid module with RJ45 jacks ­mounted vertically (ET 908H-1).

Loudspeaker (4 or 8 Ω)

Microphone
Handset:
Loudspeaker

Inputs Buttons

LINE IN+
LINE IN–
MIC+
MIC–
GND

GND

EM+
EM–
EP+

LS+
EP–

LS–
IN3
IN2
IN1

T
0

Connection keyboard
Up to 3 buttons at the terminals “T”, “0” and “X” or a keypad at the keypad-
pin plug (10 pins, distance 2.54 mm/0.1 in).
Keypad
(see keypad matrices)
R5
R1
R2
R3
R4
C1
C2
C3
C4
C5

Reset ET 908H / ET 908HMI (SIP)

During startup, connect the contacts “GND”, “T” and “X” (short circuit) until
Expansion jack the red LED connected to “LEDR+” and “LEDR–” starts blinking. The hybrid
(e.g. EB2E2AHE) module is reset.

+5V 5V JST jack

LED+
R 470 Ω internal series
LEDR G 470 Ω
LEDG R/G/B B 150 Ω resistors
LEDB for external LEDs

NC
OUT2 COM
NO

IP uplink IP downlink
LEDR+
LEDR–
COM

DC+

(LAN + PoE) (LAN)

DC
NO
NC

OUT1 15-28V

– PoE has to be connected to the RJ45 jack “IP uplink”.

– Further IP devices can be connected to the RJ45 jack “IP downlink”, e.g. an IP camera.
– Due to the switch function, up to 20 ET 908H can be linked in series (or other IP devices, e.g. PC).

ATTENTION
If multiple ET 908H are connected in series, only the first device can be supplied with Power over Ethernet.
All other devices (connected in series) must be supplied separately by an external power supply unit or PoE injector.

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The design and/or specifications of products may be subject to change for improvement without prior notice. Errors excepted.
 Security and Communication

Keypad matrices
IoIP SIP – “Enable Full Keypad“ SIP – “Function Buttons“

R1 R2 R3 R4 C1 C2 C3 C4 C5 R1 R2 R3 R4 C1 C2 C3 C4 C5 R1 R2 R3 R4 C1 C2 C3 C4 C5

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COMMEND products are developed and manufactured OBS COMMEND is represented all over the world by local Commend Partners and
by Commend Inter­national in Salzburg, Austria. ESSIVE helps to improve security and communication with tailored Intercom solutions.
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The technical data contained herein has been provided solely for informational
purposes and is not legally binding. Subject to change, technical or otherwise.
IoIP®, OpenDuplex® and Commend® are trademarks registered by Commend
International GmbH. All other brands or product names are trademarks or
registered trademarks of the respective owner and have not been specifically
earmarked.

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The design and/or specifications of products may be subject to change for improvement without prior notice. Errors excepted.