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Modem-converter E1-L/B
(stand-alone model)
Discontinued, recommended replacement is: E1-L/M
 Modem E1-L/B (standalone version) |
Features:
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The E1-L/B is a fractional E1 access device, for transmitting digital data over framed (ITU-T G.704) E1 channels. Digital data port rates are selectable for any multiple of 64 kbps up to 1984 kbps. User data occupies only the required number of E1 frame timeslots reducing billing to only bandwidth used. E1-L/B also supports unframed E1 channels.
E1-L/B device may be ordered with Ethernet, V.35 or multistandard digital interface. The multistandard interface is cable-switchable to RS-232, RS-530, RS-449 or V.35 standards. The V.35 interface uses standard M34 female connector.
Devices may be AC or DC powered (176 to 264VAC at 50Hz or 36 to 72VDC).
Device operation may be controlled via console port (RS-232 port for supervisory terminal connection).
The E1-L/B device may be configured by DIP switches or from console.
Link testing and loopback control may be performed both from console
and from front panel.
When in framed mode of operation, the remote login feature for access the remote E1-L/S or E1-XL device's console is available for E1-L/B-ETV device.
So-called monitoring channel is used (in framed mode only) for accessing the remote device status information and for remote login operation. The Sa4 bit of the timeslot 0 of the E1 frame is used for the monitoring channel operation (according to the ITU-T G.704 Recommendation). In addition, any bit of any timeslot may be assigned for the monitoring channel operation for E1-L/B-ETV device.
The state of the E1-L/B-ETV device may be monitored by SNMP protocol via IP network. The desired Sa bit for monitoring channel operation may be assigned by the SNMP for E1-L/B-ETV device.
| E1 Interface | |
|---|---|
| Line Code (E1-L/B) | HDB3 |
| Line Code (E1-L/B-ETV) | HDB3 or AMI |
| Line Impedance (E1-L/B) | 120 Ohm (twisted pair) or 75 Ohm (coax cable), jumper selectable |
| Line Impedance (E1-L/B-ETV) | 120 Ohm (twisted pair) |
| Receive Signal Attenuation Range (E1-L/B) | from 0 to -30 dB |
| Receive Signal Attenuation Range (E1-L/B-ETV) | from 0 to -43 dB |
| Jitter Attenuator | On receive, up to 120UIpp attenuation |
| Frame Structure | In acc. to ITU-T G.704. Unframed mode available |
| Multiframing | CRC4, CAS |
| Frequency Offsets Adjustment | Controlled slip buffers in receive path |
| Connector Type (E1-L/B) | Removable terminal board |
| Connector Type (E1-L/B-ETV) | RJ-48 (female) |
| Digital Interface | |
| Data Rate | up to 1984 kbps (framed Nx64 kbps), or up to 2048 kbps (unframed) |
| Clock Signals Supported | TXC, RXC, ETC, ERC |
| Modem Control Signals | DTR, DSR, CTS, RTS, CD |
| Connector Type (multistandard interface) | HDB44 (female) |
| Connector Type (V.35 interface) | M-34 (female) |
| Connector Type (RS-530/RS-232 interface) | DB25 (female) |
| Connector Type (X.21 interface) | DB15 (female) |
| Ethernet Interface | |
| Interface Type | 10/100Base-T |
| Data Transfer Rate | up to 1984 kbps (framed Nx64 kbps), or up to 2048 kbps (unframed) |
| Mode | 100 Mbps full duplex, 100 Mbps half duplex, 10 Mbps full duplex, 10 Mbps half duplex, or autonegotiation |
| Address Table Size | 15000 MAC addresses |
| Maximum Packet Size | 4224 bytes, including MAC header |
| Protocols | Transparent or Cisco-HDLC bridging IEEE protocol, selected automatically |
| Quality of Service | 8 priority levels |
| VLAN Support | In acc. to IEEE 802.1q |
| Connector Type | RJ-45 (female) |
| Alarm Interface | |
| Connector Type | Mini DIN (female), 6 pins |
| Relay Contact Current | up to 250 mA |
| Relay Contact Voltage | up to 175 VDC |
| Console Port | |
| Interface Type | RS-232 DCE |
| Serial Protocol | Asynchronous 9600 bps, 8 bits/character, 1 stop bit, no parity |
| Connector Type | DB9 (female), 9 pins |
| Diagnostics | |
| Loopbacks | Local and remote link loops, digital port loop, activated from console and by front panel switch |
| BER Tester | Activated from console and by front panel switch |
| Remote Control | |
| Remote Login | Available for E1-L/B-ETV |
| SNMP-based Management | Device state monitoring, Sa bit assignment (E1-L/B-ETV) |
| Physical | |
| Dimensions | 208 mm x 158 mm x 63 mm |
| Weight | 800 g |
| Power Source | |
| AC Power Source | 176 to 264 VAC, 50 Hz |
| DC Power Source | 36 to 72 VDC |
| Power Consumption | 20 VA Max |
| Environment | |
| Temperature | 0 to 50 °С |
| Relative Humidity | 0 to 80 %, non-condensing |
E1-L/B (V.35/RS-530/RS-449/RS-232/X.21 interface). User's Manual in Russian
E1-L/B and E1-L/R (V.35/RS-530/RS-449/RS-232/X.21 interface). User's Manual in English
E1-L/B-ETV modem (Ethernet 10/100BaseT interface). User's Manual in Russian
E1-L/B-ETH and E1-L/R-ETH, Ethernet 10BaseT interface (discontinued). User's Manual in Russian
MIB files for SNMP management
Cronyx interface cables guide
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