E&M to VoIP Gateway Appliance

Product Part Number: 251L262

The AMTELCO E&M to VoIP Gateway Appliance provides a self contained Asterisk® LTS switching environment with an integrated E&M analog interface.  Bidirectional connection of the 4-wire E&M interface to a corresponding SIP channel on the Ethernet interface is implemented through standard Asterisk dialplan entries.  Independent control of the M-lead triggering and E-lead detection is supported for radio interfaces.  Voice activation (VOX) of the M-lead signaling is supported for radio push-to-talk (PTT) compatibility.  External LED indicators provide visual confirmation of E-lead and M-lead signaling activities.

The gateway unit includes an internal web server allowing user-programmable E&M port settings and arrangement of the Asterisk dialplan through a custom designed web interface (accessible through any standard web browser).  Additional connectivity to the operating system for administration of the Linux environment or Asterisk utilities is available through SSH. 

Additional Product Specifications

Operating Environment:
Linux Distribution:                      Raspbian GNU/Linux 8 (jessie)
Asterisk® Distribution:              13.15.1

Analog Interface:
Ports:                                           1
Interface:                                     4-wire E&M
Protocol Support:                         Type I, Type IV, Type V, Manual (radio interface)
M-lead Triggering:                        Voice activation (VOX), Dialplan extensions, Asterisk Manager Interface
Optional Inbound Call Signaling:  VOX, DTMF
Adjustable Gain:                          -20dB to +10dB in each direction
Connector:                                   RJ45
LED Signaling States:                   M-lead (triggering), E-lead (detection)
Signaling Ground Reference:        Accessible (external pin)


Ethernet Interface:                   10/100 Mbps
Connector:                                RJ45
LED States:                               Link / Activity
Default IP Assignment:             DHCP (powerup)

Local Storage:

Capacity:                                   32 GB
Format:                                     Micro SD

Length x Width x Height:          3.5 in x 2.5 in x 1.5 in
Mounting Support:                    VESA 75

Power Requirements:
Input:                                       +5 VDC @ 2.5 Amps
Connector:                                Micro USB
External Wall Adapter:              Included ©