IPMA - serious problems when multiple shared lines at remote site
CallManager 4.1(3) at a central site, trying to simultaneously ring IPMA assistants which are in shared line mode at a remote site.
Because there are 10 lines at the remote office, CallManager causes a burst of SCCP messages, exceeding the reserved bandwith. As a result some messages get dropped or delivered out of order (due to TCP retransmission). This causes erratic behavior among the remote assistants' IP phones.
1) Is this a known problem with a fix?
2) What are the design guidelines about maximum number of âremote siteâ IPMA assistants that can be in shared line mode?
3) How much bandwidth (for SCCP signaling messages) must be allocated per IPMA assistant, in shared line mode, at a remote site ?
Re: IPMA - serious problems when multiple shared lines at remote
I am experiencing a similar issue whereby i have a two remote sites on the same cluster (6.X) and a shared line amongst 10 phones. Of the 10 phones, one phone is located at a remote site and the other 9 are on the same site. The 9 phones ring simultaneously but the one at the other remote site will not. I have checked the CSS & PT etc its all correct.
In your post you listed the recommendations from Cisco regarding shared lines, is there a document i can find this information as i cannot see it in any of the above, thanks.
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