Installation PTN-2-C37.94 with E1/PTN-2-C37.94 with T1
29
Release 01 02/2018
3.3.3
Estimated Delay Calculation and Formulas
Table 9 shows formulas to calculate an estimated delay. Once you have the desired
estimated delay, fill out the parameter values in HiProvision, which shows the calculated
‘P+DP+DPh’.
Table 9
Estimated Delay Formulas
Delay
No Hitless Switching Hitless Switching (SATOP) Hitless Switching (CESOP)
P
TDMFramesPerPacket * 125
Path Delay measured by HiProvision
DP
(JitterBufferSize – P) / 2
DPh
0
2P + MaxNetwPathDel 766
2P + MaxNetwPathDel 1087
Total
P + Path Delay + DP + DPh
3.3.4
Estimated Delay Examples
Find some example values below. Fill them out in the formulas to find the estimated total
delay:
TDMFramesPerPacket = 10
Pathdelay (measured by HiProvision) = 500 µs
JitterBufferSize = 4000 µs
MaxNetwPathDelayDiff = 340 µs
Table 10
Estimated Delay (µs) Examples
Delay
No Hitless Switching
Hitless Switching (SATOP)
Hitless Switching (CESOP)
P
10
* 125 = 1250
Path Delay
500
DP
(
4000
–
1250) / 2 = 1375
DPh
0
2*1250 +
340 +
766 = 3606
2*1250 +
340 +
1087 = 3927
Total
1250 + 500 + 1375 + 0 =
3125 µs
1250 + 500 + 1375 + 3606 =
6731 µs
1250 + 500 + 1375 + 3927 =
7052 µs
3.3.5
Differential Delay
Differential Delay is the difference in Path Delays between two end-points, measured in two
opposite directions over the same path.
