You are here: CSP Developer’s Guide: Common Channel Signaling > 7 SS7 PPL Information > ISUP ACC (0x00A8)
Purpose
This section includes PPL Config Bytes and Timer information for the PPL Component ISUP ACC (Automatic Congestion Control).
ISUP ACC Configuration Bytes
Byte |
Description |
Value |
---|---|---|
0x01 |
Enable/Disable ACC Remote Algorithm |
0x00=Disable 0x01=Enable (default) |
0x02 |
Remote Node ACC or non-ACC |
0x00=non-ACC node 0x01=ACC node (default) |
0x03 |
Enable/Disable Network/Link Congestion Control |
0x00=Disable 0x01=Enable (default) |
0x14 |
Throttle Timer Ticks in Seconds |
0x01=one second |
0x1E |
Average Timer Ticks in Seconds |
0x04=four seconds |
0x1F |
Alpha Value of Average Timer normalized to 128 |
64 dec (.5) 0x40 |
0x20 |
Beta Value of Average Timer normalized to 128 |
64 dec (.5) 0x40 |
0x21 |
X Value of Average Timer normalized to 128 |
102 dec (.2) 0x66 |
0x22 |
Y Value of Average Timer normalized to 128 |
25 (.8) 0x19 |
0x23 |
Threshold (Leaky Bucket Size) of Remote Node for Congestion Level 1 |
10 decimal 0x0A |
0x24 |
Threshold (Leaky Bucket Size) of Remote Node for Congestion Level 2 |
5 decimal 0x05 |
0x25 |
Increment Factor for Remote Node |
10 decimal 0x0A |
0x28 |
Network Congestion Control (NCC) Multiplicative Decrement Constant Beta_0 normalized to 128 |
128 decimal 0x80 |
0x29 |
NCC Multiplicative Decrement Constant Beta_1 normalized to 128 |
122 decimal 0x7A |
0x2A |
NCC Multiplicative Decrement Constant Beta_2 normalized to 128 |
110 decimal 0x6E |
0x2B |
NCC Multiplicative Decrement Constant Beta_3 normalized to 128 |
90 decimal 0x5A |
0x2C |
NCC Multiplicative Decrement Constant Beta_4 normalized to 128 |
40 decimal 0x28 |
0x2D |
NCC Additive Increase Constant Alpha |
8 decimal 0x08 |
0x32 |
NCC Handling of TFC |
0x00=Multi levels with priorities(ANSI, CHINA, JT) 0x01= Single Level without priorities(ITU) 0x02=Multi levels without priorities(BT) |
PPL Timers
Timer ID |
Timer |
Default Value |
---|---|---|
0x01 |
Short Timer (T_short)-T29 |
60 (600 ms) 0x3C |
0x02 |
Long Timer (T_long) - T30 |
1200 0x4B0 |
0x03 |
Tick Timer (T_tick) which drives Throttle Timer and Average Timer |
100 0x64 |
0x04 |
NCC Timer (T15+T16) |
500 0x1F4 |