SIP OPTIONS

[jyang12]

Does anybody have any idea how exactly SIP OPTIONS is used to determine the link status: in combination of Binding Refresh Time and SIP_OPTIONS_PERIOD, can we achieve multiple attempts before IPO alerts SIP is down? Say can we have 3 attempts of 30 seconds each? Below is what I'm referring to:

Avaya IP Office sends SIP OPTIONS messages periodically to determine if the SIP connection is active. The rate at which the messages are sent is determined by the combination of the Binding Refresh Time (in seconds) set on the Network Topology tab in Section 5.1 and the SIP_OPTIONS_PERIOD parameter (in minutes) that can be set on the Source Number tab of the NoUser user. The OPTIONS period is determined in the following manner:
• If no SIP_OPTIONS_PERIOD parameter is defined and the Binding Refresh Time is 0, then the default value of 44 seconds is used.
• To establish a period less than 42 seconds, do not define a SIP_OPTIONS_PERIOD parameter and set the Binding Refresh Time to a value less than 42 secs. The OPTIONS message period will be equal to the Binding Refresh Time.
• To establish a period greater than 42 seconds, a SIP_OPTIONS_PERIOD parameter must be defined. The Binding Refresh Time must be set to a value greater than 42 secs. The OPTIONS message period will be the smaller of the Binding Refresh Time and the SIP_OPTIONS_PERIOD.


THANKS

 

[jyang12]

comments anyone? Thanks

 

[stownsend]

When our SIP Provider went offline, our SIP Trunks didn't ever seem to re-register to receive calls again. We have been down for an hour or more a few times even though the provider was only down for 5-10 minutes. Outbound calling would still get through, but we could not receive calls in this state. The Status Monitor would say, Not Registered.

We ended up using IP Directed Connections and not registered connections. The only Tricky part here is if the SIP Provider has more than 4 SIP Servers that will send you calls. You need to create SIP Lines for each server in groups up to 4 IP Addresses.

Scott<-

 

[jyang12]

this is interesting, luckily we only need to deal with 1 server/proxy from our provider so this has never happened to us. however we have some discrepancy with their method in terms of outage detecting and I'm trying to see if there is a way to tune the SIP OPTIONS on the IP Office to match with theirs.

 

[Bas1234]

@stownsend, it could be that you need to enable RTP keep alives on the LAN1 or 2 > Voip tab.

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