United Kingdom
Port
iONS ONS OPS DGS WAN DCO iACO iACOs ACO ACOs ATT abONS abACO abACOs abACOhl
Loss
iONS
15
15
ONS
15
15
OPS
12
10
DGS
10
8
WAN
10
8
DCO
10
8
iACO
4
4
iACOs
5
5
ACO
4
4
ACOs
5
5
ATT
8
8
abONS
15
15
abACO
4
4
abACOs
5
5
abACOhl
1
1
Tone Plans
Tone plans permit the station user to distinguish different stages of call progress and different
types of calls. Each tone is assigned a level which ensures an acceptable quality.
Notes:
• DTMF tones are supported.
• Digital (DGS) and IP (WAN) tones are conveyed as Real-Time Transfer Protocol (RTP) packets.
No
• "
" indicates that this interface is not supported in this country.
12
5
5
5
4
12
5
5
5
4
9
2
2
2
1
7
0
0
0
-1
7
0
0
0
-1
7
0
0
0
-1
1
-5
-5
-6
-5
2
-5
-5
-5
-6
1
-6
-3
-3
-5
2
-5
-3
-3
-5
5
-2
-2
-2
-3
12
5
5
5
4
1
-6
-5
-6
-5
2
-5
-5
-5
-6
-2
-9
-9
-9
-5
Signaling, Tones, and Transmission
5
4
5
3
15
5
4
5
3
15
2
1
2
0
12
0
-1
0
-2
10
0
-1
0
-2
10
0
-1
0
-2
10
-4
-5
-5
-7
4
-5
-5
-5
-7
5
-5
-5
-5
-6
4
-5
-5
-5
-6
5
-2
-3
-2
-4
8
5
4
5
3
15
-4
-5
-5
-7
4
-5
-5
-5
-7
5
-4
-5
-5
-7
1
4
5
4
4
5
4
1
2
1
-1
0
-1
-1
0
-1
-1
0
-1
-5
-4
-5
-6
-5
-6
-5
-5
-5
-5
-5
-5
-3
-2
-3
4
5
4
-5
-6
-5
-4
-5
-4
-5
-6
-5
123