Modem-Converter E1-L/S
© 2006 Cronyx
1.3. Ordering Information
E1-L / S
—
ETV
—
SNMP
—
AC
Power supply:
AC — 176...264 VAC
DC — 36...72 VDC
Digital port:
ETV — Ethernet 10/100Base-T
V
— V.35
M
— multistandard (V.35/RS-530/RS-232/X.21)
SNMP port:
dedicated Ethernet 10Base-T
port for SNMP-based
management
Version:
S — 1U rack mount for 19-inch
cabinet
1.4. Technical Specifications
E1 Link Interface
Nominal bit rate ..............................................2048 kbps
Connector ........................................................RJ-48 (8-wire socket)
Coding .............................................................HDB3 or AMI
Framing ............................................................Framed mode: frame structure in accor-
dance with the ITU-T Recommendation
G.704; multiframes: CRC4, CAS (G.704).
Unframed mode: transparent stream trans-
mission without framing
Error monitoring ............................................Code violation
Frequencies offset adjustment ......................Controlled slip buffers on input
Transmit timing source .................................Internal oscillator, E1 receiver, digital in-
terface
Line impedance...............................................120 Ohm symmetric (twisted pair)
Receiver signal level .......................................From 0 up to –43 dB
Jitter attenuation .............................................Both in receive and transmit path, up to
120 UIpp attenuation
Surge protection..............................................TVS
Over-current protection ................................Safety fuse
Содержание E1 - L/S
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