network to clear the end-to-end connection (if any) and is
waiting for a response.
U12 001100 Disconnect indication This state exists when the mobile station has received an
i n v i t a t i o n t o d i s c o n n e c t b e c a u s e t h e n e t w o r k h a s
disconnected the end-to-end connection (if any).
U19 010011 Release request This state exists when the MS has requested the network
to release and is waiting for a response.
U26 011010 M o b i l e o r i g i n a t i n g
modify
T h i s s t a t e e x i s t s w h e n t h e m o b i l e s t a t i o n h a s s e n t a
r e q u e s t t o t h e n e t w o r k f o r a n e w m o d e b u t h a s n o t y e t
received an answer.
U27 011011 Mo b i l e t e r m i n a t i n g
modify
Th i s s ta t e e xis ts whe n t he m ob i le sta tio n h as rec eiv ed a
request from the network for a new mode and has not yet
sent a response to this request.
3 SS
3.1 Summary
I n G S M p r o t o c o l , S S p r o t o c o l i s a s u b - p r o t o c o l o f C M p r o t o c o l. T h e S S e n t i t y u s e s b o x t o
communicate with API and MM. Each SS entity shall communicate with the correspondent peer
entity using its own MM connection.