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The Clear-Com Gateway platform consists of the compact CG-X1 and CG-X4 devices for connecting 2-way radios, intercoms, telephones and IP networks. The CG-X4 carries a higher port density of 8 ports in a small form factor. Up to 16 ports can be housed in a single, standard 19” 1RU space with optional rack mount kit.


  • 4 modules for 8-ports in a small form factor
  • 4-wire connectivity (intercom, radio and audio sources)
  • VoIP connectivity (SIP and RoIP)
  • Digital radio connectivity (Digital Voice Systems' AMBE™ 3003 VoCoder technology)
  • Radio Bridging: port-to-port, port-to-multi-port, Radio-over-IP (RoIP), analog-to-digital, digital-to-digital
  • Radio Interfacing: trigger radios with 4-wire port signaling, DMR and P25 compatibility
  • IP Interfacing: Voice-over-IP (VoIP), RoIP, Unicast, Multicast, SIP (8 assignable SIP accounts per IP module)
  • Module design and highly configurable

Item Code

CG-X4-M4W1: X4 2 port 4-wire Gateway

CG-X4-M4W2: X4 4 port 4-wire Gateway

CG-X4-M4W3: X4 6 port 4-wire Gateway

CG-X4-M4W4: X4 8 port 4-wire Gateway

CG-X4-MIP1: X4 1 port IP 1 port 4-wire Gateway

CG-X4-MIP1-M4W1: X4 1 port IP 3 ports 4-wire Gateway

CG-X4-MIP1-M4W2: X4 1 port IP 5 ports 4-wire Gateway

CG-X4-MIP1-M4W3: X4 1 port IP 7 ports 4-wire Gateway


4-Wire Audio Ports

4-Wire: Input/Output Levels: -16 to 7 dBm @ 600Ω, adjustable in 0.1dB steps

Frequency Response: 5 to 3400Hz; +/-1 dB ref. to 1kHz

Isolation: >60 dB

Idle Noise: <20 dbrnC0

Input Impedance: 600Ω or 100Ω, software selectable each port

Output Impedance: 600Ω, true differential

Hybrid Return Loss: 25dB minimum

Port Signaling

M-Lead Relay: Optical: Coupled MOS

Maximum Contact Voltage: 60V DC, 20V AC

Maximum Current: 50mA

E-Lead Input: Active High Input: Open circuit or >+1.8V DC

Active Low Input: Ground, negative voltage or <+0.32V DC C

lear-Com Signaling: Eclipse and HelixNet DTMF Signaling E&M Lead (COR & PTT) Signaling

Voice-over-IP Module

IP Ports: Format: Supports 10Base-T and 100Base-T

Networking Stack: TCP/IPv4

Protocols: SIP, SDP, RTP, IPV67 and STUN (Simple Traversal of UDP through Network Address Translation)

Codecs: G.711 (fully compatible), G.726 (16/24/33/40 kbps), G.722, DVI4 (narrow/HD/Ultra HD), Linear PCM

SIP Accounts: 8 per module

Digital Radio Module

VoCoder: 3-channel

Digital Voice Systems: AMBE-3003™ Vocoder encode or decode AMBE™

Input/Output: Analog and Serial

Encode/Decode: P25, DMR

Interface and Connectors

LAN: RJ45 (port 7)

PC Configuration: USB Port Type B

4-Wire: RJ45

Power Supply
Switchable plug-in adapter with locking connector and IEC cord
Input Voltage: 85 – 264V AC; 100 – 240V AC; nominal
Output Voltage: 12V; 1.67A
MTBF (min.): 200,000 hours demonstrated

Operating: 32° - +122°F (0° - +50°C)

Storage: -40° - +176°F (-40° - +80°C)

Humidity: 0 – 95%, non-condensing


CG-X4: 5.7 x 1.4 x 13in (WxHxD)

(144.8mm x 35.6mm x 330.2mm)

CG-X4: 4.75lbs (2.15kg)

Ready to get

Our team of communications professionals are here to support your project. Contact us today to start designing your custom intercom solution.

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