SIP Provider Swisscom (CH) - Smart Business Connect

General

The Smart Business Connect Trunk (SBCon) from Swisscom was first tested and released with a SwyxWare 2015 R3.

On behalf of the customer, the partner orders the Smart Business Connect trunk (SBCon) from Swisscom. Swisscom will deliver an appropriate gateway with eSBC functionality (Cisco 881 or Cisco ISR 4321). This eSBC will act as a SIP trunk for the SwyxWare and performs the call signaling towards the Swisscom. A profile for the SwyxWare ist installed on the eSBC which is synchronized with the SwyxWare configuration.

For the connection from the SwyxWare to the eSBC, it must be assured that the eSBC in the customer's network is configured with a static IP address.

Platforms

SwyxWare

The Smart Business Connect Trunk from Swisscom can be used without restrictions from SwyxWare 2015 R3 on. When using an earlier version of SwyxWare incompatibilities cannot be excluded and use is at your own risk.

SwyxON

Because of the dependency from the locally installed eSBC, using the Smart Business Connect Trunk (SBCon) from Swisscom in a SwyxON environment is not supported.

Configuration of the SwyxWare

1. Creation of a location with the information of the assigned number range
2. Creation of a SIP trunk group with the Swisscom SBCon profile "Swisscom_SBCon (CH)"
3. In the properties of the SIP trunk group, within the tab "SIP", the IP address and if necessary, the port of the eSBC have to be configured in the field "Registrar" and in the field "Proxy"
4. Creation of a SIP trunk underneath the newly created SIP trunk group
5. Enter user credentials for registration
6. Configuration of the assigned number range

Additional settings:

CLIP No Screening
To activate feature CLIP No screening, in the tab 'Number Signaling' of the trunk properties the option 'Always use originator's number' must be set.FAX transmission
The eSBC for theSBCon supports the T.38 protocol, which was developped for FAX transmission via IP. However, T.38 must not be offered in the initial INVITE for an outgoing FAX. In the SIP trunk properties, underneath the tab “Codecs/Channel”, the option “Remove T.38 from initial invite” has to be selected. After the FAX tone was detected by the SwyxWare, it will send a reINVITE which only offers T.38.

Note: In case that FAX transmission has to be carried out through G.711 exclusively, T.38 has to be deselected in the list of supported codecs. This is not recommended since FAX transmission via T.38 is supplying a significantly better quality, stability and reliability.
At the end of this article, you find a recommenndation from the Swisscom about handling of analogue FAX machines.

Tested features

• Incoming/outgoing national calls
• Incoming/outgoing international calls
• Correct Calling Line Identification (CLI) on national and international calls
• CLIP No Screening
• Holding and retrieving calls
• Toggeling between two calls
• Call transfer
• Conferencing
• Mutually supported codecs: G.711a/ G.711µ/ G.729/ T.38
• Incoming/outgoing DTMF signaling in accordance with via RFC2833

Restrictions:
-

Test:
15/06/2016 with SwyxWare2015R3
16/02/2021 with SwyxWare 12.30

Handling of analogue FAX machines (Swisscom)