What is Average Call Duration (ACD)?
What is Post Dial Delay (PDD)?
Post Dial Delay measures the amount of time after the user dials a phone number till the time the user hears a ring-back tone.
What is the bandwidth consumption for each codec?
|
Codec Information |
Bandwidth Calculations |
||||||||
|
Codec & Bit Rate (Kbps) |
Codec Sample Size (Bytes) |
Codec Sample Interval (ms) |
Mean Opinion Score (MOS) |
Voice Payload Size (Bytes) |
Voice Payload Size (ms) |
Packets Per Second (PPS) |
Bandwidth MP or FRF.12 (Kbps) |
Bandwidth w/cRTP MP or FRF.12 (Kbps) |
Bandwidth Ethernet (Kbps) |
|
G.711 (64 Kbps) |
80 Bytes |
10 ms |
4.1 |
160 Bytes |
20 ms |
50 |
82.8 Kbps |
67.6 Kbps |
87.2 Kbps |
|
G.729 (8 Kbps) |
10 Bytes |
10 ms |
3.92 |
20 Bytes |
20 ms |
50 |
26.8 Kbps |
11.6 Kbps |
31.2 Kbps |
|
G.723.1 (6.3 Kbps) |
24 Bytes |
30 ms |
3.9 |
24 Bytes |
30 ms |
33.3 |
18.9 Kbps |
8.8 Kbps |
21.9 Kbps |
|
G.723.1 (5.3 Kbps) |
20 Bytes |
30 ms |
3.8 |
20 Bytes |
30 ms |
33.3 |
17.9 Kbps |
7.7 Kbps |
20.8 Kbps |
|
G.726 (32 Kbps) |
20 Bytes |
5 ms |
3.85 |
80 Bytes |
20 ms |
50 |
50.8 Kbps |
35.6 Kbps |
55.2 Kbps |
|
G.726 (24 Kbps) |
15 Bytes |
5 ms |
|
60 Bytes |
20 ms |
50 |
42.8 Kbps |
27.6 Kbps |
47.2 Kbps |
|
G.728 (16 Kbps) |
10 Bytes |
5 ms |
3.61 |
60 Bytes |
30 ms |
33.3 |
28.5 Kbps |
18.4 Kbps |
31.5 Kbps |
|
G722_64k(64 Kbps) |
80 Bytes |
10 ms |
4.13 |
160 Bytes |
20 ms |
50 |
82.8 Kbps |
67.6Kbps |
87.2 Kbps |
|
ilbc_mode_20(15.2Kbps) |
38 Bytes |
20 ms |
NA |
38 Bytes |
20 ms |
50 |
34.0Kbps |
18.8 Kbps |
38.4Kbps |
|
ilbc_mode_30(13.33Kbps) |
50 Bytes |
30 ms |
NA |
50 Bytes |
30 ms |
33.3 |
25.867 Kbps |
15.73Kbps |
28.8 Kbps |
SIP uses Methods / Requests and corresponding Responses to establish a call session.
SIP Requests:
There are six basic request / method types:
INVITE = Establishes a session
ACK = Confirms an INVITE request
BYE = Ends a session
CANCEL = Cancels establishing of a session
REGISTER = Communicates user location (host name, IP)
OPTIONS = Communicates information about the capabilities of the calling and receiving SIP phones
SIP responses:
SIP Requests are answered with SIP responses, of which there are 6 classes:
1xx = informational responses, such as 180, which means ringing
2xx = success responses
3xx = redirection responses
4xx = request failures
5xx = server errors
6xx = global failures
What is a SIP-URI?
A SIP URI is the SIP addressing schema to call another person via SIP. In other words, a SIP URI is a user’s SIP phone number. The SIP URI resembles an e-mail address and is written in the following format:
SIP URI = sip:x@y:port Where x=Username and y=host (domain or IP) port= #
Examples:
sip:joe.bloggs@212.123.1.213:5060
sip:support@phonesystem.3cx.com:5060
sip:22444032@phonesystem.3cx.com:5060
The SIP URI standard has been defined in the RFC 3261 standard.
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