help • 26 Cross-network connections • Linking of two locations (head office and branch)
26.3 Linking of two locations (head office and branch)
This scenario includes two locations, London (A) and Liverpool (B). An ISDN trunk to the local public network is installed at both locations. Furthermore, both locations have a SIP trunk to a SIP provider. The two locations are also connected directly via a SwyxLink trunk connection on a VPN.
When calls are made from London (A), the system should attempt to dial into the Liverpool location (B) and the local public network in Liverpool (C) first via the SwyxLink trunk connection. Thereafter, it should attempt to dial in via the SIP trunk and the public network (ISDN).
Internal calls should also be routed via the SwyxLink trunk connection.
Configuration at the London (A) Location
ISDN Trunk Settings
Parameter
 
Name
ISDN London
Description
ISDN access in London
Public number
44151 4777 00 -99
SIP Trunk Settings
Parameter
 
Name
SIP London
Description
SIP access in London
Public number
44151 888 00-99 (numbers assigned by provider)
SwyxLink Trunk AB settings
Parameter
 
Name
SwyxLink AB
Description
Connects London with Liverpool
Managed
locally
Remote Server
SwyxServer B
Public number
44151 555 00 -99
Routing
*Calls from London to Liverpool (+44151*) should first be routed via the SwyxLink connection.
*If the SwyxLink connection is not available, then these calls should be routed via the SIP trunk (SIP London; priority 500).
*Only if these two routes fail should calls be routed via the public telephone network (ISDN London) to London.
Priority
Allowed
Phone number
Trunk Group
1000
Allowed
+44151*
SwyxLink AB
500
Allowed
+44151*
SIP London
100
Allowed
+44151*
ISDN London
Call Permissions
*It is permitted to route calls made via the SwyxLink trunk to London into the local public network in London (allowed; +[CC][AC]*). It is not permitted to make calls to other external numbers via this trunk (not allowed; +*). It is permitted to dial internal numbers in London (allowed; *).
*Users in London may make calls to any location in the United Kingdom (allowed; +44*).
*Calls made via the SIP trunk or ISDN trunk in London may be routed to any location (allowed; +*).
Profile
Allowed
Destination number
With public line access
SwyxLink-Trunk
Allowed
+[CC][AC]
All
SwyxLink-Trunk
Not allowed
+*
All
SwyxLink-Trunk
Allowed
*
All
User DO
Allowed
+44*
All
SIP-London
Allowed
+*
All
ISDN London
Allowed
+*
All
Configuration at the Liverpool (B) Location
ISDN Trunk Settings:
Parameter
 
Name
ISDN Liverpool
Description
ISDN access in Liverpool
Public number
4430555 00-99
SIP Trunk Settings
Parameter
 
Name
SIP Liverpool
Description
SIP access in Liverpool
Public number
44151 666 00-99 (numbers assigned by provider)
SwyxLink Trunk Connection Settings:
Parameter
 
Name
SwyxLink AB
Description
Connects London with Liverpool
Managed
remotely
Remote Server
SwyxServer A
Public number
44204777000-999
Routing
*Calls from Liverpool to London (+4420*) should first be routed via the SwyxLink connection.
*If the SwyxLink connection is not available, then these calls should be routed via the SIP trunk (SIP Liverpool; priority 500).
*Only if these two routes fail should calls be routed via the public telephone network (ISDN Liverpool) to London.
Priority
Allowed
Phone number
Trunk Group
1000
Allowed
+4420*
SwyxLink AB
500
Allowed
+4420*
SIP Liverpool
100
Allowed
+4420*
ISDN Liverpool
Call Permissions
*It is permitted to route calls made via the SwyxLink trunk to Liverpool into the local public network in Liverpool (allow; +44151*). It is not permitted to make calls to other external numbers via this trunk (not allowed; +*). It is permitted to dial internal numbers in Liverpool (allowed; *).
*Users in Liverpool may make calls to any location in the United Kingdom (allowed; +44*).
*Calls made via the SIP trunk or ISDN trunk in Liverpool may be routed to any location (allowed; +*).
Profile
Allowed
Destination number
With public line access
SwyxLink-Trunk
Allowed
+44151*
All
SwyxLink-Trunk
Not allowed
+*
All
SwyxLink-Trunk
Allowed
*
All
User B
Allowed
+44*
All
SIP Liverpool
Allowed
+4420*
All
ISDN Liverpool
Allowed
+4420*
All