Howto:Business Trunking - Proximus - SIP Provider

Innovaphone Compatibility Test Report

Summary

SIP Provider: Proximus

The tests were made by Proximus following their Certification Plan for Telephony systems operating with their IMS network.

• Features:

• • Direct Dial In
  • DTMF
  • CGPN can be suppressed
  • Emergency Calls
  • Redundancy

• Supported Codecs by the provider
  • G711
  • G729
  • T.38 UDP

Current test state

This product is being tested right now. The test is not yet completed.

Configuration

Firmware version

All innovaphone devices use V11r2.

SIP - Trunk

• External Trunk to SIP Provider

• Internal Trunk to PBX

• 2 Different Trunks for Fixed and Mobile and redundancy of both, so total of 4 External Trunks

Number Mapping

• Internal Extensions are 2XX.

Route Settings

Extra Options

• Disable Interworking of Hold Notifications to SIP Provider

During the tests we concluded that when interworking the hold-notify message to SIP and sending to SIP Provider two consecutive Re-Invites with "send-only" attribute the IMS platform reply to the second re-invite with "inactive" so by doing this the call it's put on hold without any Music on Hold just silence. To avoid this behaviour we need to disable the interworking of the hold-notify message by setting:

!config add SIP /no-hr-notify
!config write
!config activate

• SIP Options Interval (Optional)

The IMS from Proximus uses SIP Options to monitor the SIP Trunks, so it's mandatory that Innovaphone replies to incoming SIP Options received, this it's done by default. Additionally we can also send SIP Options to the SIP Proxy and have similar mechanism for redundancy mechanism, when the remote Proxy doesn't reply to outgoing SIP Options the Innovaphone Gateway will send the call to the next interface. We can set:

!config add SIP /options-interval 30
!config write
!config activate

• Remove Comfort Noise (CN) Capability from SDP

During the tests we found out some specific 3rd party devices connected to the IMS network when doing the coder negotiation to a single coder preference repeat the coder negotiation till they have only 1 coder in the offer or till they reach a specific number of retries. Since Innovaphone by default always include the payload 13 (Comfort Noise) this would made the remote device to do multiple re-invites to try to reach to a single coder/payload in the offer. To avoid this we could disable the sending of Comfort Noise capability since this it's not used and by design was implemented for Lync Interop.

!config add SIP /rem-cn-capability
!config write
!config activate