Appendix I
ISW CALL TYPE DESCRIPTION
I-1 ASTRO Signaling ISW Call Types
Table I-1. ASTRO Signaling ISW Call Types
Code Description
G1 Steered Call Request (Reserved)
P1 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 Interconnect Reject Request
Z7 2nd First Word Code For Dual ISWS
Will be used to Multiplex Existing $08 Dual Words
X1 First Word Code for Dual ISW Format
I2 Private Call II Channel Request: 2nd word of Dual ISW
Y1 Dynamic Reqrouping Command: 2nd word of Dual ISW
X2 Extended Function Command: 2nd word of Dual ISW
G3 Un-affiliated Group Call Request: 2nd word of Dual ISW
X3 Talk Group Association for Emergency Alarm
S1 DVP Enhanced PCII: 2nd word of Dual ISW
P5 Mobile_To_Land Subfleet Interconnect: 2nd word of Dual ISW
M1 Automatic Unit Affiliation; 2nd word of Dual ISW
Z2 Type II Messages
S2 DVP Individual Interconnect
S3 DVP (SBLT) Land-to-Mobile Interconnect (ICU comm.) (reserved)
S4 DVP Secure (SBLT) (affiliated): single word request
S5 DVP PC-II Enhanced Ring: 2nd word of Dual ISW
S6 Not Assigned
I1 PC II Enhanced Ring: 2nd word of Dual ISW
I3 PC II Enhanced Ring Acknowledge: 2nd word of Dual ISW
A1 Call Alert II - Enhanced Ring: 2nd word of Dual ISW
A2 Call Alert II - Enhanced Ring Acknowledge: 2nd word of Dual ISW
Z4 LINKNET Radio Registration: 2nd word of Dual ISW
Z5 Dispatcher Interrupt Ring: 2nd word of Dual ISW
I-1
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