This is a recording of the November 22, 2023 Live-on-Zoom SIGTRAN M2UA technical training given by Luc Morissette, Director, Customer Service, TelcoBridges.

1. SIGTRAN - M2UA
Confidential

2. Topics Covered in this Presentation
▪ Sigtran M2UA Overview
▪ Sigtran support on TelcoBridges products
▪ M2UA configuration
▪ M2UA Status
• Troubleshooting

3. 3
Sigtran M2UA Overview
Confidential
▪ M2UA Sigtran Protocol
▪ Used to terminate SS7 signaling over IP (ASP mode)
▪ Used to relay SS7 signaling over IP (SG mode)
▪ Used to relay MTP2 links over IP (ASP relay mode)
▪ Replaces TDM MTP2 link (64kbps)
▪ IP/Port instead of Trunk/Timeslot (E1/T1)
▪ Higher bandwidth – usually only one M2UA link is necessary
▪ Runs on IP and SCTP
▪ Multiple streams with priority, compared with TCP

4. Sigtran M2UA Overview
4
▪Application Server Process (ASP) mode:
▪ Used to terminate ISUP/SCCP signaling
▪Media remains TDM
MTP3
SCTP/IP
MTP2
TDM
Point Codes
IP/Port
T1/E1 timeslot
ISUP/SCCP
M2UA

5. SS7 Termination with M2UA ASP
5
Service Switching Point (SSP)
ISUP
MTP3
M2UA links
over IP
SSP: Terminates ISUP traffic
M2UA links SS7
Network
STP
SSP
SSP
STP
Each SSP/STP device has a Point Code
Call Control
M2UA
Circuits
Point Codes
Linksets
M2UA ASP mode
IP/Port
TMG

6. Sigtran M2UA Overview
6
▪Signaling Gateway (SG) mode:
▪ Used to relay SS7 (ISUP/SCCP) signaling
▪ No Media
M2UA
SCTP/IP
MTP2
TDM IP/Port
T1/E1 timeslot
Network Interface Function (NIF)
Link: Interface Identifier

7. SS7 relay with M2UA SG
7
Signaling Gateway (SG)
MTP2
SS7 MTP2
Links on TDM
SS7
Network
Sigtran M2UA
on SCTP/IP
SG: Relays ISUP/SCCP traffic
SS7 MTP2
Links on TDM
SS7
Network
Sigtran M2UA
on SCTP
Network Interface
Function (NIF)
Sigtran
Network
Sigtran
Network
M2UA
Does not require a Point Code
TMG/TSG
T1/E1/DS3/
OC3/STM1

8. Sigtran M2UA Overview
8
▪ASP Relay mode :
▪Used to relay MTP2 links over an IP network
▪No Media
Signaling Gateway (SG)
MTP2
SS7 MTP2
Links on TDM
SS7
Network
Sigtran M2UA
on SCTP/IP
Network Interface
Function (NIF)
M2UA
ASP Relay Mode
M2UA
Network Interface
Function (NIF)
MTP2
SS7 MTP2
Links on TDM SS7
Network
T1/E1 T1/E1

9. Sigtran Support
9
TMG800 TSG800 TMG3200 TSG3200 TMG7800
License
M2UA link
License
MTP2 link
ASP mode Yes No Yes No Yes Required x
SG mode Yes Yes Yes Yes Yes Required Required
Maximum
M2UA
links
64 64 84 84 256 x x
▪ Supported on all TelcoBridges platforms
▪ TMG: Media Gateways
▪ TSG: Signaling Gateways

10. M2UA SG Configuration concepts
SAP
Remote M2UA
Sigtran system
or Media
Gateway
Controller (MGC)
SS7
Network Peer
Sigtran M2UA links
(IP)
SS7 MTP2 Links
(TDM)
Interface ID = 54
IP/Port
SAP: Service Access Point
Network Interface
IP/Port
One peer, one IP
Single SCTP association
1.
First (and only) MTP2 link = M2UA Interface ID 54
TMG/TSG
SG Mode

11. M2UA SG Configuration concepts
11
Sigtran M2UA links
(IP)
Cluster Remote M2UA
or
MGC
SS7
Network Peer
Interface ID = 54/55
2.
IP/Port
First MTP2 link = M2UA Interface ID 54
Second MTP2 link = M2UA Interface ID 55
SAP
One peer, one IP
Single SCTP association
One Cluster
TMG/TSG
Network Interface
IP/Port
SS7 MTP2 Links
(TDM)

12. Cluster
M2UA SG Configuration concepts
12
M2UA SG
SAP
Remote M2UA
or
MGC
SS7
Network
Peer
Sigtran M2UA links (IP)
SS7 MTP2 Links (TDM)
M2UA SG
SAP
Remote M2UA
or
MGC
SS7
Network
Peer
Peer
Interface ID = 54/55
Two IP/Port
IP/Port
IP/Port
One peer, two IP
Single SCTP association
2 peers, one IP/port each
Two SCTP Associations
Active/Standby or
Load Sharing
Cluster
Interface ID = 54/55
3.
4.
First MTP2 link = M2UA Interface ID 54
Second MTP2 link = M2UA Interface ID 55
TSG800

13. Remote 2
Remote 1
Remote 2
Cluster
Cluster
Cluster
M2UA SG Configuration concepts
13
M2UA SG
SAP Remote 1
SS7
Network
Peer
Peer
Sigtran M2UA links (IP)
SS7 MTP2 Links (TDM)
M2UA SG
SAP
SS7
Network
SAP
Peer
Peer
Interface ID = 54
Interface ID = 54
Interface ID = 55
IP/Port
IP/Port
IP/Port
Cluster
Interface ID = 55
IP/Port
Two clusters, one Interface ID per peer
Two SAPs, two clusters, one interface ID per peer
6.
5.
First MTP2 link = M2UA Interface ID 54
Second MTP2 link = M2UA Interface ID 55
TSG800

14. M2UA ASP Configuration concepts
SAP
Remote M2UA
Sigtran system
or
MGC
Peer
Sigtran M2UA links
(IP)
Interface ID = 54
IP/Port
M2UA: ASP mode
Network Interface
IP/Port
One peer, one IP
Single SCTP association
1.
TMG/TSG
SS7 upper layers:
MTP3, ISUP

15. SS7 MTP2 link configuration
15
▪For M2UA SG mode only
▪64kbps or HSL (1.5Mbps)
▪Specify Trunk/timeslot(s)
carrying the MTP2 link

16. M2UA Configuration
16
▪ IP Networks
▪ Local port, Local IP, Vlan, Bonding
▪ M2UA
▪ Remote IP, Remote port, Protocol type (ANSI, ITU, Japan)
Remote M2UA
Sigtran system
Sigtran M2UA link
(IP)

17. 17
Local IP Configuration
Confidential
•IP Interfaces Menu
Virtual Port – Create New Virtual Port
• Physical ports, VLAN, bonding
IP Interfaces – Create New IP Interfaces
• Traffic Type: Sigtran, Local IP Address

18. 18
IP Virtual Ports
• To create vlan/untagged and bonding
Confidential

19. 19
IP Virtual Ports
• Create new virtual port (Bonding)
Confidential

20. 20
IP Interfaces
• IP Interfaces
• Need one IP interface for Sigtran traffic
Confidential

21. M2UA Configuration
• Create the SCTP Layer
21
(c) 2010-2019 TelcoBridges Inc.

22. M2UA Configuration
22
▪ M2UA Node Type
▪ SG, ASP or ASP relay mode

23. M2UA Configuration
23
▪ SAP: Local interface to use
▪ Local IP interface + Local Port

24. M2UA Configuration – SG mode
24
▪ M2UA cluster: Regroups M2UA links and Peers
▪ Multiple MTP2 links associated to M2UA Interface ID
▪ Interface ID type: Integer or String

25. M2UA Configuration – ASP mode
25
▪ M2UA cluster: Regroups M2UA links and Peers
▪ Not attached to a MTP2 link
▪ Will be used by a MTP3 configuration

26. M2UA Configuration
26
▪ M2UA Peer
▪ One peer, two IPs:
▪ Single SCTP association
using multi-homing

27. M2UA Configuration
27
▪ M2UA Peer
▪ 2 peers, one IP each => Two SCTP Associations

28. 28
Upper layer Configuration
• SG mode → Configuration complete
• ASP Mode:
• Configure MTP3 and ISUP
• Activate Configuration
Confidential

29. Status
29
• Can see global status of the system
Physical ports
IP Interfaces

30. IP Status
30
• Availability, link speed, MAC Address, bonding status

31. 31
M2UA Status
Confidential
• Can see the status of the M2UA link

32. 32
M2UA Status – Link control
Confidential
• Additional Information about the M2UA link

33. 33
M2UA Status – Peer
Confidential
• Additional Information about
the peer
• Can change the state of the
M2UA link (ASP only)
• Shutdown/Asp-active
• Used for testing
• Apply states
• Will take effect immediately

34. M2UA Configuration – Lab Setup
34
For Lab setup:
▪ MTP3
▪ Point codes, linkset, MTP3 routes
▪ TDM line interface
▪ E1 + E1 loopback
▪ ISUP
▪ Circuit groups: link with physical timeslots for voice/data

35. VPN for
external connection
M2UA Configuration – Lab Setup
35
ISUP
MTP3
Call Control
M2UA
One Circuit Group
CIC 1 to 31
Point Code: 7.0.1
One Linkset
IP: 192.168.101.181
Port 3565
ISUP
MTP3
Call Control
One Circuit Group
CIC 1 to 31
Point Code: 7.0.2
One Linkset
IP: 192.168.101.160
Port 3565
M2UA
Local IP network
E1
MTP2
NIF
E1
MTP2
Loopback
M2UA SG mode
M2UA ASP mode
Trunk 1
Timeslot 1
64kbps
TMG 1+1 mode TMG standalone
Trunk 0
Timeslot 1
64kbps

36. 36
M2UA Configuration – Lab Setup
• Show Lab configuration and status
Confidential

37. Bring up sequence
37
Signaling Gateway (SG) Application (ASP)
INIT
INIT_ACK
COOKIE_ECHO
ASP_UP
ASP_ACTIVE
COOKIE_ACK
ASP_UP_ACK
ASP_ACTIVE_ACK
Traffic mode:
Override/Load Share
Window size
number of streams
Upper SS7 stacks
Traffic mode:
Override/Load Share
SCTP association
M2UA links
NOTIFY
Interface ID
inactive
Window size
number of streams
SIOS
SIO
To TDM
MTP2

38. Bring up sequence
38
Signaling Gateway (SG) Application (ASP)
STATE_REQ
STATE_CONF
NTFY
Upper SS7 stacks
To TDM
MTP2
Interface ID list
Active
ESTAB_REQ
First Interface ID
Emergency Alignment
First Interface ID
First Interface ID
Do for each Interface ID
ESTAB_CONF
First Interface ID
SIE
FISU

39. Troubleshooting tools
• Global Status from Web portal
• See if local IP interface is available
• See if M2UA link is up
• IP Connection test
• Connect SSH to unit
• telnet 172.31.1.1
• ping -B [Local_IP] [Remote_IP]
• For example: ping -B 192.168.101.160 192.168.101.181
39
[confidentiality]

40. Troubleshooting tools
• M2UA Signaling Trace
• Connect SSH to unit
• type “tbsigtrace”
• This will create a M2UA cap file, viewable with wireshark
• Get the file from the unit with sftp:
/lib/tb/toolpack/setup/12358/3.2/apps/tbsigtrace
40
[confidentiality]

41. TBReport
▪ Report
▪ Captures logs for a
specified date

42. TBReport
▪ Report includes
▪ Application logs for a specified time span
▪ Journal of host
▪ Snapshot of the telecom unit configuration and status
▪ Configuration backup

43. Documentation
▪ Installation: https://docs.telcobridges.com/Tmedia_Products_Installation
▪ M2UA overview: https://docs.telcobridges.com/M2UA
▪ M2UA configuration:
https://docs.telcobridges.com/Toolpack:Protocol_Stack_Settings_E#tab=SS7_ISUP
▪ Troubleshooting: https://docs.telcobridges.com/Tmedia_Troubleshooting
▪ Support: https://docs.telcobridges.com/Tmedia_Support

44. THANK YOU!
www.telcobridges.com
support@telcobridges.com
+1.450.655.8993
44
Confidential