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ELF2-AE - external E1 interface for Asterisk

Product preview

elf2-1u

Features
  • Master/slave relative to E1, master/slave relative to Asterisk
  • Hardware echo supressor
  • Support of the main telephony signaling CAS, CCS, including SS7
  • Enlarged buffer for support of the virtualized servers
  • Hot swapping of interface, not stopping the server
  • Point-to-point mode, independently from the server
  • Optional bypass mode
  • Rack-mount
  • Supported in the standard DAHDI packages
  • The best price/performance ratio

 

Resources

Description

External interface ELF2-AE represents a device, designed for input/output of the E1 synchronous streams via the TDMoX protocol in IP АТС Asterisk. Together with Asterisk, the interface provides functionality of АТС, IP АТС, E1 cross-connect, data transfer via E1 and many other things. ELF2-AE is physically connected to the Asterisk server via the Ethernet interface. The TDMoX protocol implemented in the device is optimized for high latencies in the network. So, in the enlarged buffer mode ELF2 allows start of the Asterisk server in virtual environment - under the control of KVM, ESXi, XEN and others. The device serves up to 4 E1 ports with the optional bypass mode between ports.

Return MAC address of the server is determined by the device automatically, it allows connection of several interfaces to a single server and organize their hot reservation.

 

Technical data

Dimensions
140x110x35/480x105x44 mm
Weight
0.35kg (case) / 0.85 kg (rack-mount)
Power consumption
5 W
Ambient temperatures
0°С to +70°С
Humidity
Less then 80%
Power voltage
220V +-20%
Connector type
RJ45, 8 pins
Cable type
Symmetrical twisted pair, 120 ohm
Nominal pulse voltage
3 V +- 10%
Data transmission speed
2048 kbit/s +- 50 ppm
Coding
AMI/HDB3
Signal attenuation, no more (E1a)
-40 db
Signal attenuation, no more (E1b)
-6 db
Corresponding standard
ITU G.703, G.704, G.706, G.732, G.823
Ethernet port
Connector type
RJ45, 8 pins
Cable type
Symmetrical twisted pair (UTP)
Data transmission speed, mbit/s
100
Corresponding standard
IEEE 802.3
Operating modes
Duplex, Half duplex, Auto negotiation

Order codes

ELF2-AE
1 E1 port, 1 Ethernet port, case
ELF2-AE-EC
1 E1 port, 1 Ethernet port, echo canceller, case
ELF2-AE-1U

1 E1 port, 1 Ethernet port, rack mount

ELF2-AE-EC-1U 1 E1 port, 1 Ethernet port, echo canceller, rack mount
ELF2-AE2-1U 2 E1 ports, 1 Ethernet port, rack mount
ELF2-AE2-EC-1U 2 E1 port, 1 Ethernet port, echo canceller, rack mount
ELF2-AE2-EC-BP-1U 2 E1 ports, 1 Ethernet port, echo canceller, bypass, rack mount
ELF2-AE4-1U 4 E1 ports, 2 Ethernet ports, rack-mount
ELF2-AE4-EC-1U 4 E1 ports, 2 Ethernet ports, echo suppression, rack-mount
ELF2-AE4-EC-BP-1U 4 E1 ports, 2 Ethernet ports, echo suppression, bypass, rack-mount

 

Applications

ELF2-AE devices and backup Asterisk server

Call center & Organization of Interactive Voice Response Services

According to the foregoing diagram a simple call queue can be realized as a voice menu and automatic fax sending with the requested information.

Flexible PBX

 

VoIP gateway

ELF2-AE alone with the Asterisk software can be used for creation of a termination node of a IP telephony provider.

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