Motorola R-2550 Programming Reference Manual page 235

Notes:
Code
Steered Call Request (Reserved)
Individual Interconnect Request
G2
20 Channel (affiliated) Group Call Request
P2
Centralized Interconnect Request For: Group-To-Land Call (reserved)
P3
Centralized Interconnect Request for: Subfleet Call
P4
Individual Interconnect Mobile_Transpond Response
R
Not Assigned
Super Word Identifier (used for variable id info): 2nd word of Dual ISW
Variable ID Registration: 2nd word of Dual ISW
Call Types are defined in the table.
Trunk 2 IS W Call Types
Trunking Trunk II ISW Data (continued)
Description
Motorola Communications Analyzer
19
Trunking Option Programming Reference