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New Member

Connection Delay

When we receive an PSTN call on the ip phones(7912). Upon answering our users give a standard greeting of hello, their name and the company name. The person calling doesn't hear all of this, Usually just the very last bit. It seems there is a delay in the establishment of the call. The user has to repeat the greeting. The phones are remote and have to connect to CCM over the VPN rtt are usually >500ms. I can only assume it is the delay of the VPN connection


Re: Connection Delay

The most general resolution to this problem is inserting this configuration on the originating Cisco IOS? gateway:

voice dial-peer # pots

progress_ind alert enable 8

progress_ind setup enable 3

New Member

Re: Connection Delay

What i am understanding is ur CCM is at the central site and Ip phones are at remote site connected ova VPN tunnel.

If you are expreiencing the delay in this and ping is >500 than, you understand the issue rite. Voice max acceptable delay shouldnt be more than 300 however at some cases it can be more.

You can ask your SP to give u alternate route so that the delay will be less.

I have exp exactly such kinda situation in the past and lowering the delay on the link helped that.

Hope this will help

Cisco Employee

Re: Connection Delay

What do the phones display? Proceed, Ring out, Connected?

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