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M2PA
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Telephony stack
Telephony
TDM, ISDN/PRI, SS7, and VoIP call control.
01
PCM / TDM
pcm-tdm
↓
→
02
ISDN PRI
pri
↓
→
03
Q.931
q931
↓
→
04
ISUP
isup
↓
→
05
LNP
lnp
↓
→
06
CNAM
cnam
↓
→
07
AIN
ain
↓
→
08
H.323
h323
↓
→
09
SIP
sip
↓
→
10
SDP
sdp
↓
→
11
RTP
rtp
Highlight:
isup
— ISUP
M2PA headers
Header
4B
Address / ID
4B
Type / Opcode
2B
Payload
16B
Integrity
2B
Hover a field for description.