IP Audio Intercoms

IP Split Type Audio Intercom Terminal (Controller + Panel)

Item No.: NAS-8521
Mainly used for business consulting and emergency calling at ATM (Automatic Teller Machine) or self-service areas in bank.
Description Specifications Wiring Diagram Dimensional Drawing
● Adopting unique split type intercom design (controller + panel), effectively avoid the exposure of the network cable in the user area, ensuring the communication security in banks.
● One NAS-8521A intercom controller can drive 16 intercom panels simultaneously, the series connection between the intercom panels could reach the length of 300 meters.

● Features of NAS-8521A IP intercom controller:
a. Equipped with 1×3.5mm Recording Output interface, can be connected to DVR/NVR for audio recording.
b. Equipped with 2×Alarm Input and 2×Alarm Output interface for external linkage with emergency button, infrared detector, smoke detector, alarm light or electronic door lock.
c. Supporting local triggering the broadcasting of the audio files in the SD card via alarm signal (e.g. voice messages to remind the user of security issues during withdrawal).
d. Optional: 2×10W digital amplifier module (can be used for local sound reinforcement of background music or security warning messages by connecting external passive speakers).
e. Equipped with standard RJ45 interface, accessible to the system wherever Ethernet is available, supporting cross-segment and cross-router.

● Features of NAS-8521B/C IP intercom panel:
a. Providing single button & dual button panels for options.
b. Adopting full metal case and leakproof structure, secure and solid.
c. Supporting embedded installation or wall-mounted installation.
d. Supporting tamper alarm function, being able to activate warning siren whenever the equipment has been forcibly damaged.
e. Protection grade could reach IP54.
f. Supporting one-touch calling to the target intercom terminal (by presetting the calling target on the server) to realize full duplex intercom.
g. Available for custom settings of ringtones (including "calling through", "busy line" and "target hang up") by copying corresponding audio files to the SD card.
h. Built-in 3W speaker and microphone, available for hands-free calls.
●Model No.: NAS-8521A IP Intercom Controller
●Power Supply & Consumption:  DC 12V/2A, ≤23W
●Network Protocol:  TCP, UDP, ARP, ICMP, IGMP, HTTP
●Network Chip Rate:  10/100Mbps
●Audio Sampling & Bit Rate:  8kHz~44.1kHz, 16bit, 8kbps~320kbps
●Audio Coding:  MP3, PCM, ADPCM
●Built-in Amplifier:   2×10W/8Ω Class-D Digital Amplifier
●Color:  Silver
●Material:  Plastic
●Language:  English
●Interface:  1xPower Port, 2xRJ45, 1x3.5mm Audio Output, 1×3.5mm Recording Output, 2xAlarm Input, 2xAlarm Output, 2×Amplifier Output, 1xSD Card Port
●Working Temperature & Humidity:  0℃~50℃, ≤90%RH (Not Condensing)
●Dimensions & Weight:  210x155x45mm, 0.5kg

●Model No.: NAS-8521B/C/E IP Intercom Panel
●Color:  Silver
●Panel Material:  Aluminum
●Installation:  Embedded or Wall-mounted
●Language:  English
●Interface:  2xRJ45
●Working Temperature & Humidity:  -20℃~70℃, ≤90%RH (Not Condensing)
●Dimensions & Weight:  NAS-8521B/C: 166x115x32mm, 0.8kg
 NAS-8521E: 155x67x30mm, 0.3kg
NAS-8521A IP Intercom Controller

NAS-8521B/C IP Intercom Panel

NAS-8521E IP Intercom Panel
(Suitable for Compact Space Installation)


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Changsha SPON Communication Technology Co., LTD was established in 2004 with over 20000 Square meter workplace . It is a national high-tech enterprise which has own core intellectual property and innovative research & development capabilities. We have rich experience in IP video and audio products and PA system products.
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