RCS Server DNS Name for phones to obtain their Teleworker address 1

[kwbMitel]

Does anyone know the IP and/or DNS name and port that the 69XX phones are trying to contact the RCS server for their Teleworker Address?

I have a site failing to contact and I believe teh port is closed.

**********************************************
Any intelligent fool can make things bigger and more complex… It takes a touch of genius – and a lot of courage to move in the opposite direction.

 

[Billz66]

We dont use it but there was references to it in the RCS user guide

https://rcs.aastra.com/rcs/login.php

I would imaging the ports would be similar to those required for MBG(TW) servers

If I never did anything I'd never done before , I'd never do anything.....

 

[sarond]

I believe the RCS site is to configure your devices and where to get their provisioning from.

i.e. not sure it is the actual RCS server that the phones get their redirection details from.

 

[kwbMitel]

Maybe I should mention why I need this. I hate it when people don't state their goals, so I should emulate what I want instead of what I don't.

I have a large customer where the system is in a data center and all phones are Teleworkers. The RCS server allows the TW address to be automatically programmed when the phone is plugged in instead of statically assigning it one by one.

The phones are not reaching the RCS server. I suspect the firewall is not allowing the return traffic to the request in the same way that we had difficulty syncing the licensing on the existing servers (Port 22/443 to sync.mitel-amc.com)

As such, I want to be able to instruct the firewall support on what IP and Port needs to be open to get the setup info.

Has anyone had a similar issue and how was it resolved?

**********************************************
Any intelligent fool can make things bigger and more complex… It takes a touch of genius – and a lot of courage to move in the opposite direction.

 

[sarond]

Are all the phones on a single site? (i.e. not multiple home/remote sites)

Could you not just setup a local DHCP Server to give the phones their options?

Also I think using wireshark or having the firewall guys run a trace to find what the phone is trying to connect to is going to be your quickest way to find out.

I don't have a 69xx phone to test with and I don't have access to the RCS.

I assume you have tested from your office or home to confirm RCS etc... is ok.

 

[kwbMitel]

@Sarond

DHCP is good for one site but not for a remote site. Our contractor for the remote site has been delayed and the phones are on site and can't be modified from here.

Yes the RCS server works from our office but thats using a dedicated network without a firewall and a firewall configured to our needs. The customer uses a 3rd party for firewall support so specific are key to reducing costs.

Thanks for your input, I'm under the gun here and I think I'll be calling Mitel today.

I'll advise with my findings.

**********************************************
Any intelligent fool can make things bigger and more complex… It takes a touch of genius – and a lot of courage to move in the opposite direction.

 

[sarond]

With a Wireshark trace I factory reset a 6920 on an isolated network.

On boot it queries DNS for rcs.aastra.com, this resolved to 216.191.234.139

It then connects to port 443 (https) obviously its encrypted from here on but I believe the RCS must use HTTPS for provisioning.
I don't have access to RCS to test any further.

This is fairly standard for SIP phones (which the 6900 series descended from when Aastra) I know Yealinks do something similar.

 

[danramirez]

@Billz66, where is that RCS User Guide, edocs??

I do have aceess to RCS but we use it for redirecting phones to our cloud service.

@kwb Are you saying we could also use the RCS for redirecting phones to an MBG Telewoeker address?

Cheers,

http://www.hatkanatelecom.com

 

[sarond]

@danramirez,

RCS Doc

https://es.mitel.com/sites/default/files/41-001302-01_REV05_RCS_User_Guide.pdf

 

[danramirez]

I tested it and it works!! RCS can also be used for redirecting Minet devices to MBG URL, this way Teleworker sets don't have to be preloaded with MBG's IP.

Cheers KWB,

Daniel

http://www.hatkanatelecom.com

 

[danramirez]

thank you sarond for the documentation!

http://www.hatkanatelecom.com

 

[kwbMitel]

FYI, I have found a way the get around the issue by using DHCP.

Worst case, it the DHCP gets turned off, the RCS should be reachable and if not its very few phones that are affected.

Thanks for the input everyone, and for those that learned a new trick, thanks for the star.

As an added tip, the RCS is a one stop only. It can't be used to change the TW IP. Believe me, I wish it did.

**********************************************
Any intelligent fool can make things bigger and more complex… It takes a touch of genius – and a lot of courage to move in the opposite direction.

 

[jpruder]

What was your DHCP work around? I would assume that if this is https traffic, any MSL that is reachable could contain the redirect file in /home/e-smith/ibays/Primary or whatever the full path is

 

[kwbMitel]

The issue was that the Main Data Subnet had a DHCP scope to tell the phones where to find the Vlan.

Once the phone gets option 125 data it ignores the RCS server.

We dont currently have access to the DATA DHCP Scope.

I changed the DHCP scope in the voice Vlan to point the phones at the Public IP for the TW server.

This put the running phones at risk if they lost power but the customer accepted the risk

**********************************************
Any intelligent fool can make things bigger and more complex… It takes a touch of genius – and a lot of courage to move in the opposite direction.