Owner manual

Appendix B: Required Service Parameters
414 MaxCS 7.5 Administration Manual
Technical Information for E1 with Voice
Switch Type:
• Austel TS014
• ETSI NET5 (recommended)
• NT DMS-100
Framing:
• No CRC (recommended)
• CRC4
Line Coding:
• Alternate Mark Inversion (AMI)
• HDB3 (recommended)
Physical Termination:
• RJ-48X or RJ-48C
Wire:
• 4 wires
E1 Channel Assignment
• Data Channels Assignment – 1st channel (channel ID 0)
• Channels Assignment – 17th channel (channel ID 16)
• Hunting – Most Idle, Least Idle, Ascend, Descend
• DNIS Digits – can be 3 to 10 digits
CSU/DSU Requirements
The CSU (channel service unit) is a device used to connect a digital trunk line coming in from the phone
company to the PBX. A CSU can terminate signals, repeat signals, and respond to loopback commands sent
from the central office.