[global]
title	"GPRS PDP Context Activation (L3 only)"

[entities]
# define the entities in the system (in order)
ms	"MS"
bss	"BSS"
sgsn	"SGSN"
dns	"DNS"
ggsn	"GGSN"

[messages]
# define the protocol messages in-order
ms	bss	"L1 RACH burst"
bss	ms	"RLC/MAC establishment"
ms	sgsn	"LLC (SM PDP CONTEXT ACT REQ)"
sgsn	dns	"DNS query A record of APN"
dns	sgsn	"DNS response IP address of GGSN"
sgsn	ggsn	"GTP-C (PDP CONTEXT ACT REQ)"
ggsn	sgsn	"GTP-C (PDP CONTEXT ACT ACK)"
sgsn	ms	"LLC (SM PDP CONTEXT ACT ACK)"
ms	sgsn	"LLC (SNDCP (encapsulated IPv4))"
sgsn	ggsn	"GTP-U (encapsulated IPv4)"
ggsn	sgsn	"GTP-U (encapsulated IPv4)"
sgsn	ms	"LLC (SNDCP (encapsulated IPv4))"