V180808N
T-APS Users Manual
Page 6
1: SET T1/E1 MODE
[
BOLD TYPE
] = Recommended Settings
After selecting T1, T1 Light will be on.
After selecting E1, E1 Light will be on.
Selections for Line Format and Line Code depend are different if T-1 or E-1 is selected here.
2: SET WORK MODE
1+1
End to End or Single Ended, Full T Service application. Data sent on both Active and Protection Path. T-APS
duplicates CPE Tx data on both lines and the better quality path is selected on each end regardless of the other
end. Monitors for loss or degradation of either path.
1:1
End to End Fractional T Service application. CPE Data sent on Active path only. Protection path used for
circuit performance and communication between T-APS units.
Units use the same line at each end. Monitors for loss or degradation of either path.
Blind 1
Independent operation. No communication between T-APS units and equipment at
remote site. CPE Data on both paths. Can be used with other APS type devices. Monitor for
loss of CO signals on Active line and transfers to Protection path. Provides Protection path
status from LOS only when the path is not in use.
Blind 2
Independent operation. No communication between T-APS unit or equipment at
remote site. CPE Data sent on Active Path only .Can be used with other APS type devices.
Monitors for loss of CO signals on Active line and transfers to Protection Path.
Does not monitor condition of Protective Path when not in use.
7.3.
T1/E1 Auto Protection Switch 1+1, 1:1 or Blind
Comparison Chart
Item
Function
1+1
1:1
Blind 1
Blind 2
1
Switching Time (within)
12ms
25ms
12ms
12ms
2
Ability to retrieve protection path status (Good or Bad)
from CO or CPE.
No
Yes
No
No
3
Ability to provide protection path status (Good or Bad)
from LOS only
Yes
Yes
Yes
No
4
Manual switching to working path on both ends (CO or
CPE)
No
Yes
No
No
5
Single Ended Application
Yes
No
Yes
Yes
6
Duplicate CPE Signal in both Active and Protective Path
Yes
No
Yes
No
Note: Referring T-APS installed in both CO to CPE sides
CO: Central Office
CPE: Customer Premises Equipment
