ERM-MUX/Plus-E&M Voice Tributary Card
The ERM-Mux/plus E&M Voice Tributary Card provides six independent Ear & Mouth Voice channel capability. Each channel can independently assign any 64Kbps timeslot from the aggregate E1. Individual Shielded RJ-45 connectors provide the voice connections. Standard UTP or alternately shielded UTP are both acceptable cabling media. These voice channels may be linked to PBX (Private Branch Exchange) to facilitate voice to voice connections. The channels support selection of Type 1~5, support 2 or 4 wire operation and have 0.5dB steps for signal attenuation. When using this card, an appropriate voice compatible power module must be used in the ERM-MUX/Plus.
Features:
- Six independent channels
- 2/4 wire independent setting
- 1x64 setting from any E1 channel
- E&M Signaling PBX trunks
- Provides E line, M line, SB (battery) and SG (ground) lines
- G.711 Codec
- LED indicators for Power, Alarm, activity
- Hot Swappable
Specifications:
Loop current: 5~30 mA, maximum 70 mA.
Return loss: 300-600Hz >12dB (2W)
600-3400Hz >15dB (2W)
300-3400Hz >20dB (4W)
Group delay: @-10dBm0 <750uSec(2W) <600uSec(4W)
Total Distortion: according to ITU-T G.223
Channel crosstalk: < -65dB, 1020Hz@0dBm0
Noise: <-65dBm0p weighted
Temperature: 0°C ~ 50°C
Humidity: 5~95%
MTFB: 65,000 hrs
