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ELF2-AE - external E1 interface for Asterisk
| 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
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DescriptionExternal 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| General | 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%
| | E1 interface | 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
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Order codesELF2-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 |
ApplicationsELF2-AE devices and backup Asterisk server
Call center & Organization of Interactive Voice Response ServicesAccording 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 gatewayELF2-AE alone with the Asterisk software can be used for creation of a termination node of a IP telephony provider.
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