Raisecom Technology Co., Ltd
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3. Parameters
3.1. Basic configuration
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Main circuit: 8 fast Ethernet ports, 16 E1 ports.
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Power supply: two power supply modules, 90-264V/AC or -36V- -72V/DC.
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Management interface: CONSOLE, SNMP network management interface
(utilize any of the 8 fast Ethernet ports).
3.2. Ethernet interface parameters
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Speed: 10/100M auto-negotiation
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Connector:
RJ-45
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IEEE802.3
compliant
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IEEE802.3x flow control
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AUTO-MDI/MDIX
3.3. E1 interface parameters
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75ohm unbalanced or 120ohm balanced E1 connector.
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16 E1 ports, the first 8 E1 ports utilize one DB37 and the second 8 E1 ports
utilize another DB37.
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Bit rate: 2048Kbps±50ppm.
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Line coding: HDB3.
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Input impedance: 75ohm unbalanced.
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Electric
characteristic: ITU-T G.703 compliant.
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Frame structure: ITU-T G.704 compliant
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Jitter: ITU-T G.823 compliant.
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In single E1 mode:
E1 interface supports both framed and unframed E1 mode and can be
configured through software (unframed mode by default).
In framed E1 mode, support N*64k sub-rate access and FAS (PCM31
without CRC4), FAS+CRC4 (PCM31 with CRC4), FAS+CAS (PCM30
without CRC4) and PAS+CRC4+CAS (PCM30 with CRC40).
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In E1 Inverse Multiplexing mode:
Adopt frame-interleave multiplexing to realize the transportation of Ethernet over
multiple E1.
E1 wire sequence auto-sensing
The maximum relative latency of E1 line is +/-16ms
Automatically adjust the E1 link capacity of transmission channel if one or more
E1 link fails
Only support framed E1 (PCM31, FAS+CRC4 by default), CRC auto-negotiation
