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 |