0x0101 RTP Payload Size (IPN Series 3)

RTP payload sizes can be changed in multiples of the specified RTP Payload Type's base packetization rate. On the IP Network Interface Series 3 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:
Outseize Control message
Route Control message
Resource Attribute Query message
Resource Attribute Configure message

Byte | Description
Profile 4
0, 1 | Tag 0x0101 RTP Payload Size
2, 3 | Length 0x0001
4 | Value[0] Multiple of the basic packet rate 0x04 or 0x06
Profile 5
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 - 0x03 G.723.1 (5.3 Kbps) G.723.1 (6.3Kbps) 0x02 - 0x06 (even only) - G.711 A-Law, G.711 u-Law 0x02 - 0x12 (even only)-G.726 (16, 24, 32, 40 Kbps) 0x02 - 0x06 (even only) - G.729 (8 Kbps)

Real-Time Transport Protocol. Supports transport of real-time data like interactive voice and video over packet-switched networks.
Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.
The protocol used in most local area PC networks. Typically, most Ethernet networks support data transmission speeds up to 10 Mbps, but 100 Mbps is also possible.
See Programmable Protocol Language.
See Information Control Block.
Outgoing call setup during real-time call processing on a specific channel.
PCM and companding standard used in Europe to compress and expand the amplitude range of a signal before and after transmission. See µ-Law.