User's Manual

E1 Spread Spectrum Radios
5-1
5 Interface
5.1 Front Panel
E1 interface can be of unbalanced 75Ω BNC or balanced 120Ω RJ-48. User’s can flexibly choose either of
these two interface equipment.
Besides the standard E1 interface, the equipment also provides service, monitor, data, User I/O and control
port. This allows the user to conveniently fully monitor the control room through this equipment. This
equipment has 8 input ports, plus 4 output ports.
5.1.1 Engineering Order Wire(EOW)
Service phone plays a significant role in underdeveloped and mountainous areas. Other than possessing the
function of selective and entire calling, it also has the following most distinguishing features: whole tone service
like dial tone, engage tone, out-of-order tone etc. Users do not feel much difference in using service phone
from general phone service because it is very user-friendly and fits all the demands of users. We can also use
textmenu to set up the service phone numbers.
9 Dial tone: When dialing from the local station, you’ll hear the same dial tone as any general telephones
Engage tone: The repeating ring tone is 2 ± 0.2s ring and 4 ± 0.4s break
Ring tone: Same as the engage tone
Out-of-order tone: When there is an out-of-order service or lost of signal service, it will ring the
out-of-order tone at 500 ± 50ms, 230ms ± 70ms and then break connection
Busy tone: Continue to redial at an exchange of 500ms ± 50ms