Calculate Bandwidth

1.  What codec used?
2. cRTP?
3. What L2 technology used?
      
1.
 
G711 (20 sampling rate):160
G729 (20 sampling rate): 20

Other Sampling rate:

G711 30 samp rate: 240
G729 30 samp rate: 30

If Sample rate = 20 at 50pps
if sample rate = 30 at 33pps
      
2. cRTP

 If yes= 2 bytes header or 4 if checksum enabled (disabled
  by default but use 4 bytes..)
if NO= 40 byte
header


3.  L2 technology used:

Ethernet: 32
MLP: 13
Frame-relay:4 (+ 2) ! SRND does not add the 2 bytes for frame delimiter! à Frame-relay=6
Frame-relay with LFI FRF12: 8
PPP:12

Calculate:
Bandwidth=
((codec+header+L2)*8) * pps (50 or 33)
example:
G729
no cRTP
Frame relay
(use all default..)

Bandwidth = ((20+40+6)*8)*50 =
26400
25600/1000=26.4
Kbps per call