
The ERM01 is a 4U 19(23)" concentrator rack type E1
DSU/CSU for Fractional and Unframed G.703 E1 Access for
central office installations. There are 13 slots available for hot
swappable G.703 E1 cards. An optional SNMP card can be
installed into the last slot for configuration and management,
leaving 12 slots available for G.703 cards. The SNMP card
provides both local control via an RS-232 serial console port and
remote IP management using Telnet or industry standard SNMP
protocol. Each E1 card may be linked to a remote E1/FE1
stand-alone Access Unit for various LAN, Data, or hosts over E1
network services. The ERM01 accommodates an optional
second hot swappable shared power supply module which may
derive power from AC (90-250) or DC (-48V) power sources. On
the rear panel, combinations of BNC, RJ-45 and wire-wrap
terminals are utilized for E1 Line interface connections. Adapter
cables are used to convert the HDB26F DCE data ports to V.35,
RS-530, RS-449, X.21 or 10/100 Base Ethernet depending on
the installed card.
ERM01
Managed G.703 E1 CSU/DSU Concentrator
Features
Managed chassis (Optional) with DSU/CSU blades
Supports Fractional and Unframed E1 with EOC control
Hot swappable blades and power modules
Interface Cards for V.35, X.21, RS-530, RS-449, RS-232,
Ethernet Bridge and Router
I/O connectors all on rear panel
Multiple clock source selection (Internal or External: E1
recovery, DTE or DCE)
Built-in BERT with V.54 diagnostic capabilities for
performing local and remote loopback
Supports local serial Console, remote Telnet and SNMP
Supported by SmartView EMS
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Ordering Information
ERM01 Chassis
ERM01-AC-CH :
ERM01-DC-CH :
ERM01R-AC-CH :
ERM01R-DC-CH :
ERM01B-AC-CH :
ERM01B-DC-CH :
AC power type chassis w/ E1 BNC, RJ45
DC power type chassis w/ E1 BNC, RJ45
AC power type chassis w/ E1 RJ45
DC power type chassis w/ E1 RJ45
AC power type chassis w/ E1 BNC
DC power type chassis w/ E1 BNC
Power Card
ERM01-AC :
ERM01-DC :
AC Power card ( 100 ~ 240 VAC )
48VDC, 72VDC Power card
Clock mode 0
Rx & Tx clocks (recovered) to (DCE1) sync DTE
Clock mode 1
Rx & Tx clocks (internal oscillator) to(DCE2) sync DTE
Clock mode 2
Rx clock to sync device,(DTE1) Tx clock from sync device
Clock mode 3
Rx & Tx clocks from (DTE2) sync DCE (from ETC and ERC pin)
Clock mode 4
Rx & Tx clocks from sync DCE (DTE3) (all from ETC pin)
ITU-T G.703, G.704, G.706 and G.732 and ETSI ETS 300 420
AC: 100~240VAC
DC: -42~-55
80W
Chassis : 285 x 438 x 180mm
(D x W x H)
Line card: 260 x 22 x 180mm (D x W x H)
6.6kg
0~50°C (Operating) ,-10~70°C (Storage)
10~90% non-condensing
CE, FCC, RoHS
57,000
hrs (25°C)
G.703 E1
Frame format
Bit rate
Line Code
Receiving level
Line Impedance
Jitter Performance
Pulse amplitude
Connector
Transmit frequency
tracking
Return loss
User Data Channel
Interface Types
Connector
Line code
Data Rate
Time slot allocation
Control signals
Loopback
Unframed/ Framed, CCS(PCM31)/
CAS(PCM30)/ CRC4 on/off
2.048Mbps±50 ppm
AMI/ HDB3
0 ~ -43dB
75 ohm(BNC) / 120 ohm (RJ-45)
According to ITU-T G.823
Nominal 2.37V ±10% for 75ohm,
Nominal 3.00V ±10% for 120ohm
Zero amplitude ± 0.1V
BNC for unbalanced and RJ-45 for balanced
Internal timing ±30 ppm
Loopback timing ±50 ppm
External timing ±100 ppm
12dB for 51 ~ 102KHz
18dB for 102 ~ 2048KHz
14dB for 2048~ 3072KHz
RS-530/RS-449/RS-232,X.21/V.35,
10/100Base-T Ethernet Bridge & Router
High density DB26 Female
NRZ (except bridge)
N x 56Kbps or N x 64Kbps, Where N equal 1 to 32
User defined
CTS constantly On,
DSR constantly ON, except during test loops,
DCD constantly ON or follows RTS, except during signal loss
Line loopback, Payload loopback, Local loopback,
DTE loopback
Clock modes
Standards
Power Input
Power Consumption
Dimensions
Weight
Temperature
Humidity
Certification
MTBF
5-1
E1 CSU/DSU Concentrator
ERM01
www.ctcu.com
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