bolsen6581
Vendor
First lets get this out of the way- SWA is not active so TS is out of question and system is at 4.X. Large customer with Per nodes so an upgrade isn't in the cards at this moment as it will be costly no matter how you cut it. Have to work with what I got. The customer just came to us and bought SIP trunks and now is asking us to help.
I am fully certified on the MCD/MAS side of things and have a general understanding of how SIP works but I am still no expert so please no silly answers like "can they ping"
I've gone over the SIP CoE documents for this multiple times and the only configuration guide is one for a 3300 7.x system to Cisco CUCM which was published by Cisco and I can only assume the customer has as well for the Cisco side since I can't see what he's doing.
What is occurring is when a call is placed in either direction the calls are working great. The issue is that when calling the Cisco from a Mitel phone, if the cisco user either doesn't answer or presses a "Divert" button the call is dropped by the Mitel, instead of going to the Cisco systems voicemail. The Cisco guide did mention that calls to the Mitel that were rerouted to the voicemail failed under certain circumstances which is fine. I am only concerned with the Mitel to Cisco direction at the moment.
We are connecting directly to a "Subscriber" from what I am told and we've also tried connecting directly to a "Publisher" What those are in cisco land I am not sure. We have no MBG (Mitel Boarder Gateway) or Mitel SIP Proxy between us.
I've tried flagging the Peer as a public trunk but that hasn't worked.
I've tried to disable all COS options for the SIP peer and only enable the specific ones stated in the document in the off chance this was a COS issue
I've tried to disable all the SIP peer options except those mentioned in the off chance this was a problem with my SIP peer settings
I've used just default COS and Peer settings only enabling/disabling those settings specifically told to.
From what I can tell in all my testing is that we require a "SIP Gateway" between us but I am not sure if it has to be the Mitel SIP Proxy or if this is something the Cisco can provide. I just need some sort of confirmation and maybe even a brief explication as to why for the customer and my supervisors. Thank you.
I am fully certified on the MCD/MAS side of things and have a general understanding of how SIP works but I am still no expert so please no silly answers like "can they ping"
I've gone over the SIP CoE documents for this multiple times and the only configuration guide is one for a 3300 7.x system to Cisco CUCM which was published by Cisco and I can only assume the customer has as well for the Cisco side since I can't see what he's doing.
What is occurring is when a call is placed in either direction the calls are working great. The issue is that when calling the Cisco from a Mitel phone, if the cisco user either doesn't answer or presses a "Divert" button the call is dropped by the Mitel, instead of going to the Cisco systems voicemail. The Cisco guide did mention that calls to the Mitel that were rerouted to the voicemail failed under certain circumstances which is fine. I am only concerned with the Mitel to Cisco direction at the moment.
We are connecting directly to a "Subscriber" from what I am told and we've also tried connecting directly to a "Publisher" What those are in cisco land I am not sure. We have no MBG (Mitel Boarder Gateway) or Mitel SIP Proxy between us.
I've tried flagging the Peer as a public trunk but that hasn't worked.
I've tried to disable all COS options for the SIP peer and only enable the specific ones stated in the document in the off chance this was a COS issue
I've tried to disable all the SIP peer options except those mentioned in the off chance this was a problem with my SIP peer settings
I've used just default COS and Peer settings only enabling/disabling those settings specifically told to.
From what I can tell in all my testing is that we require a "SIP Gateway" between us but I am not sure if it has to be the Mitel SIP Proxy or if this is something the Cisco can provide. I just need some sort of confirmation and maybe even a brief explication as to why for the customer and my supervisors. Thank you.
