Digital Cable Modem М-101 is designed to build a high -speed duplex digital link between remote devices with Е1 interface. The specific feature of the modem is in its ability to pass two Е1flows through one SHDSL -linear interface. SHDSL -linear interface complies with ІTU-T G.991.2.bіs and uses ТСРАМ - Trellіs-Coded Pulse Amplіtude Modulatіon coding set for transmission.
Modem is equipped with two SHDSL- ports, two E1-ports, and one port with RS-232 interface.
RS-232-port is used to control the modem. External terminal (PC) is connected to the port.
SHDSL-port operates in plesiochronous mode. The Maximum length of SHDSL-line is decreasing during the increasing of data transfer rate.
Modem is resistant to man-maid noise, has complete galvanic isolation with the link and power system.
Modem operates in the following climatic conditions:
- temperature of ambient environment is in the range from 238 to 323K (from -350 to +500 C)
- relative humidity is not more than 98% under the temperature of 298K (250 C)
- air pressure is from 60 кPa to 113 кPа (from 450 to 850 mm.m.c).
Weight of fully completed modem is not more 7 kg;
Dimensions:
- Length – 482 mm;
- Width – 349 mm;
- Height – 196 mm.
Specifications:
| SHDSL -interface parameters | |
| Interface parameters of SHDSL-port are according to the ²TU-T G.991.2.b³s recommendations. | |
| Number of channels: | 2 |
| Connection type: | point-to-point |
| Cable type: | TPP, KSPP, MKSB-1.2, P-296, P-274Ã,PTRK |
| Linear code: | TCPAM |
| Data transfer rate range, kBps,: | from 64 to 2048 |
| Change of data transfer rate step, kBps: | 64 |
| Link mode: | full-duplex |
| Information transfer mode: | synchronous, packet |
| Packet format: | HDLC |
| Connector type: | SY27467EIIB05SLC |
| - E1-interface parameters | |
| E1-interface parameters are according to the ²TU-T (G.704) recommendations. | |
| Number and type of interface: | 2 Balanced |
| Linear code: | HDB3, AM² |
| Data transfer rate range, kBps: | 2048 |
| Communication range through TPP-0.4 cable: | 0,6 |
| - RS232-interface parameters | |
| Transfer rate, bps: | 115200 |
| Protocol: | 8-N-1 |
| Flow control: | no |
Power supply:
- AC: 187…242 V, 43…65 Hz. Rating value is 220V, 50 Hz;
- DC: 18…36 V protected from false polarity connection. Rating value is 27 V.