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 ?