SCA/SLA engage BLF while line is in use

Occasional Contributor

SCA/SLA engage BLF while line is in use

Phone Information

Phone Model VVX 500

Part Number 3111-44500-001 Rev:A

UC Software Version

Updater Version



I have provisioned a Polycom phone successfully using much of the documentation on these forums, but my last hurdle is configuring Shared Call Appearance on these Polycoms.



I have included the registration file (Someone else could use it to configure their own SLA in the future)


The phone does work with SCA by accepting the call and calling out, but the BLF does not remain lit if the line is in use.


I have two Yealink phones with SLA and can see that both of them light the BLF when the line is engaged, so I can confirm that the PBX is sending out the NOTIFY message.

I feel like it is a setting that I have not turned on!


Any help would be great.

Polycom Employee & Community Manager

Re: SCA/SLA engage BLF while line is in use

Hello afanencoo,

welcome to the Polycom Community.

You are only specifying a reg.2 but your attendant is a



In addition your URL is empty:



and we do not know if your server even supports this type of Attendant or only the one described  => here <=

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services


If official support is required please check how to phone or open a case here

The title Poly Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
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