0x0101 RTP Payload Size (IPN Series 2)

RTP payload sizes can be changed in multiples of the specified RTP Payload Type's base packetization rate. On the IP Network Interface Series 2 card, the RTP payload size is tightly coupled with RTP payload type. Changing the default RTP payload type also changes the default RTP payload size to its applicable value (unless a new default RTP payload size is also specified). Using the non-default RTP Payload Type during call establishment results in the default RTP Payload Size not being used. If the RTP Payload Size is not provided, the default for the specific payload type is used.

In effect, changing the multiple also changes the throughput available over an Ethernet network. Larger packets create greater network delay overall, but they use the Ethernet bandwidth more efficiently. Smaller packets may use the Ethernet bandwidth less efficiently, but they may provide better voice quality.

Used in:
0x1E Generic PPL ICB in:
Resource Attribute Query message
Resource Attribute Configure message

Byte

Description

Profile 1

0, 1

Tag 0x0101 RTP Payload Size

2, 3

Length 0x0001

4

Value[0] Multiple of the basic packet rate

0x01 - 0x06

Profile 2

0, 1

Tag 0x0101 RTP Payload Size

2, 3

Length 0x0001

4

Value[0] Multiple of the basic packet rate.

 

Depends on the Payload Type used as follows:

0x01 - 0x04 - G.723.1 (5.3 Kbps)
G.723.1 (6.3Kbps)

0x01 - 0x06 - G.711 A-Law, G.711 u-Law

0x01 - 0x09 - G.726 (16 Kbps)

0x01 - 0x24 - G.729 (8 Kbps)