Polycom Trio System Hybrid Line Registration

The Polycom Trio 8500 and 8800 system supports hybrid (Skype for Business / Open SIP) registration.

You can simultaneously register one line with Skype for Business or Open SIP and a second line with another Open SIP server. Similarly, you can choose to register all lines with Open SIP sever. You can also choose the number of lines you want to use by setting the value in reg.limit parameter.

If you plan to configure and register Skype for Business on one line, make sure to always use Line 1 for Skype for Business. You cannot simultaneously register two Skype for Business lines.

In addition, you can configure the line switching feature based on dial plan when the phone is on-hook. The line switching feature enables the dialed number to switch to the corresponding line. For example, when you place a call from the phone and the number corresponds to an Open SIP line, the line switching feature enables the dialed number to switch to the corresponding line.

Moreover, for dial plan based line switching, when all the lines are registered to Open SIP, the value defined in the global parameter for a dial plan takes the priority. For example, dialplan.impossibleMatchHandling and dialplan.conflictMatchHandling . Similarly, if the line is registered to Skype for Business, the value defined in the per-registration dial plan parameter takes priority over general dial plan parameter. For example, dialplan.1.conflictMatchHandling and dialplan.1.impossibleMatchHandling .

When more than one digit maps are getting matched to the dialed number - a conflict match - and the dialplan.conflictMatchHandling parameter is disabled, the first matching digit map starting from left to right takes priority. However, if dialplan.conflictMatchHandling parameter is enabled, the matching digit map having the lowest timeout value takes priority.

However, line switching is configurable based on dial plan when the phone is off-hook. By default, line switching for on-hook and off-hook dialing is disabled.

Note that the Presence feature is available only on the Skype for Business line and will display the Device status. The following table list the Presence status for specific environment.

Table 1. Presence Status Indicators for Hybrid Line Registration

Use Cases

Presence State on SfB Line

Presence String

Presence State on Open SIP Line

Non-Skype line in a call

Busy

In a call

Not Supported

Skype line in a call

Busy

In a call

Not Supported

Content shared over PPCIP

Busy

In a call

Not Supported

Non-Skype line in conference

Busy

In a conference

Not Supported

Skype line in conference

Busy

In a conference

Not Supported

DND on Skype line

DND

Do Not Disturb

Not Supported

DND on Open SIP line

Available

Available

Not Supported