Polycom RMX 1500 Administrator's Manual page 905

Table C-19 Event Fields for Event 18 - NEW UNDEFINED PARTICIPANT
Field
H.243 Password
Chair
Video Protocol
Broadcasting
Volume
Undefined
Participant
Node Type
Bonding Phone
Number
Video Bit Rate
Description
Not supported.
This field remains empty.
Not supported.
Always contains the value 0.
The video protocol, as follows:
1 - H.261
2 - H.263
4 - H.264

255 - Auto
The broadcasting volume assigned to the participant.
The value is between 1 (lowest) and 10 (loudest).
Each unit movement increases or decreases the volume
by 3 dB.
Indicates whether are not the participant is an undefined
participant, as follows:
0 - The participant is not an undefined participant.
2 - The participant is an undefined participant.
The node type, as follows:
0 - MCU
1 - Terminal
Note: This field is only relevant to ISDN/PSTN
participants.
The phone number for Bonding dial-out calls.
Bonding is a communication protocol that aggregates
from two up to thirty 64 Kbps B channels together, to
look like one large bandwidth channel.
The video bit rate in units of kilobits per second.
A value of 4294967295 denotes auto, and in this case,
the rate is computed by the MCU.
Chapter C-CDR Fields - Unformatted File
C-41