Protocol bytes, Total – Siemens HIPATH 8000 User Manual
Page 166
Alphabetical Reference
166
Codec Negotiation
The following table indicates which codec will be selected depending on
which codec is selected on each phone, a G711 always option is included
because some non-Siemens phones may include this option.
Note that the table is read with Phone A calling Phone B. The table is not
symmetrical so does not describe the situation if B calls A. If a call is
cleared because the codecs are not compatible, the phone will display "Ter-
minal Incompatible".
Bandwidth calculation
Calculation into dependence of:
• Codec
• RTP packet size
• Transmission medium
1. LAN
Maximum LAN-Overhead (Ethernet-Full Duplex per direction)
High
Quality
Preferred
(Codec
G729)
High
Quality
Preferred
(Codec
G723)
Low Band
Preferred
(over 729)
Low Band
Preferred
(over 723)
Low
Band
Only
(over
729)
Low
Band
Only
(over 723)
G711
Prefered
(over 729)
G711
Prefered
(over 723)
G729
Prefered
(over 723)
G729
Prefered
(over 729)
High Quality
Preferred (G729)
G722
G722
G722
G722
G729
*
G729
*
G722
G722
G722
G722
High Quality
Preferred (G723)
G722
G722
G722
G722
G723
*
G723
*
G722
G722
G722
G722
Low Band
Preferred
(over 729)
G729
G729
G729
G729
G729
G729
G729
G729
G729
G729
Low Band Pre-
ferred (over 723)
G729
G729
G723
G723
G723
G723
G723
G723
G723
G723
Low Band Only
(over 729)
G729
G729
G729
G729
G729
g729
G729
G729
G729
G729
Low Band Only
(over 723)
G723
G723
G723
G723
G723
G723
G723
G723
G723
G723
G711 Preferred
(Codec 729)
G711
G711
G711
G711
G729
*
G729
*
G711
G711
G711
G711
G711 Preferred
(Codec 723)
G711
G711
G711
G711
G723
*
G723
*
G711
G711
G711
G711
G729 Preferred
(Codec 723)
G729
G729
G729
G729
G729
G729
G729
G729
G729
G729
G729 Preferred
(Codec 729)
G729
G729
G729
G729
G729
G729
G729
G729
G729
G729
*
Note that the B party uses a codec in the preferred order of the A party and this regardin section 6.1.
Phone A
Phone B
Protocol
Bytes
RTP
12
UDP
8
IP
20
802.1Q VLAN Tagging
4
MAC (incl. Preamble, FCS)
26
Total
70