CTC Union IPM-4SE User Manual download pdf (Page 24)

Specifications

Frame format

CRC on/off

Bit rate

Line codes

Rx sensitivity

Tx driver

Line impedance

Pulse amplitude

Pulse shape

Temperature

Humidity

MTFB

CAS(PCM30) / CCS(PCM31)

2.048Mbps

HDB3/AMI

0 ~ -43dB

1.5km over 0.5mm E1 cable

75 ohms (unbalanced)

120 ohms (balanced)

nominal 2.37V (75ohm)

nominal 3.00V (120ohm)

According to ITU-T G.703

0°C ~ 50°C

5 ~ 95%

65,000 hrs

Features

Available in 2, 8 E1 channels

Supports PCM31 or PCM30 framing

Can provide path/card redundancy

E1 timeslots can support cross-connect function

E1 channel can act as Sub-E1 for Drop&Insert

Hot Swappable

●

The ERM-Mux/plus has two dedicated slots for installing E1 aggregate cards. Currently E1 cards are available with 2, 4 or 8E1 ports. In

the backplane design of the ERM-Mux/plus, a maximum of 4 E1s can carry data to and from tributary (I/O) cards. One typical

application could be to install two 4E1 cards in the chassis and have the cards act as one master and one hot-standby card for E1

redundancy. For other applications, an 8E1 card could be used to cross connect E1 timelots prior to assignment to the four available

backplane channels. Another application can use the 'extra' E1 aggregate channels for drop & insert (Sub-E1) rather than performing

cross connection. It can quickly be seen that a large number of applications are possible with the ERM-Mux/plus's flexible design.

CPUA and CPUB slots can insert two CPU modules that

automatically work in redundant operation mode. CPU

modules are responsible for all parameter setup from local PC

or from the selected in-band E1line. The setup of the

ERM-MUX/Plus may be accomplished by:

Local PC connected by Ethernet to SNMP

(can be extend to multiple cases with RS485 twisted-pair ).

Local PC connected by serial NMP port to Windows® NMP

GUI.E1 network connected to SNMP/NMP GUI.Local terminal

console mode.

Specifications

RS-232 port for dumb terminal at 9.6k, 8bit, no parity

SNMP V1 and V2C support

MIB file compliant to MIB-II ASN.1

Firmware upgrade by TFTP

Hot swappable

●

ERM-Mux/Plus-E1

G.703 E1 Aggregate Card

ERM-Mux/Plus-CPU

CPU Control Card

E1 Access Multiplexer

4-24

ERM-MUX-PLUS

www.ctcu.com CTC UNION TECHNOLOGIES CO., LTD.

E1 Access Multiplexer

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CTC Union IPM-4SE User Manual Page 24

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