ERM-MUX/Plus-E1 G.703 E1 Aggregate Card
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.
Features:
- Available in 2, 4 or 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
Specifications:
Frame format: CAS(PCM30)/CCS(PCM31)
CRC: on/off
Bit rate: 2.048Mbps
Line codes: HDB3/AMI
Rx sensitivity: 0 ~ -43dB
Tx driver: 1.5km over 0.5mm E1 cable
Line impedance: 75 ohms (unbalanced); 120 ohms (balanced)
Pulse amplitude: nominal 2.37V (75ohm); nominal 3.00V (120ohm)
Pulse shape: According to ITU-T G.703
Temperature: 0°C ~ 50°C
Humidity: 5~95%
MTFB: 65,000 hrs
