Product Part Number: 251L282 (2 port)
Product Part Number: 251L277 (4 port)
The AMTELCO E&M to VoIP Gateway Appliances provide a self contained Asterisk® LTS switching environment with multiple integrated E&M analog interfaces. Bidirectional connection of the 4-wire E&M interfaces 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.
The AMTELCO Gateway Appliances can be powered from the network using Power over Ethernet (PoE), or using an included DC wall adapter. An integrated fan provides for internal component cooling, and an external power switch is included for controlled shutdown and startup of the appliance.
Additional Product Specifications
| Operating Environment: | |
| Linux Distribution: | Raspbian GNU/Linux 8 (jessie) |
| Asterisk® Distribution: | 13.15.1 |
| Analog Interfaces: | |
| Ports: | 2 or 4 |
| Interface: | 4-wire E&M |
| Protocol Support: | Type I, Type II, 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, per port: | RJ45 |
| LED Signaling States: | M-lead (triggering), E-lead (detection) |
| Signaling Ground Reference: | Accessible (external pin) |
| Network: | |
| Ethernet Interface: | 10/100 Mbps |
| Connector: | RJ45 |
| LED States: | Link / Activity |
| Default IP Assignment: | DHCP (assigned upon power up) |
| Local Storage: | |
| Capacity: | 32 GB |
| Format: | Micro SD |
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Dimensions: |
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| Length x Width x Height: | 6.25 in x 3.625 in x 1.875 in |
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Power Requirements: |
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Either, or both for redundancy, are supported: |
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Power over Ethernet: |
48VDC (802.3at) |
| Micro USB: | +5 VDC @ 2.5 Amps (External Wall Adapter Included) |