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New Member

IP phones and Call Manager

CallManager---3745RTR--(IPSEC)---PIX506E---IP phone

In the above scenario, CM is behind 3745 and IP phone is behind PIX506E. So CM and IP phone belong to two different subnets.

Question:

1) CM and IP phones are able to be located in two different subnets and will still work. Is this

THE CASE?

2) Also is there any IPSEC timeout issue here which will affect the ip phone to CM connection? Thanks

1 REPLY
New Member

Re: IP phones and Call Manager

1. CallManager is designed to allow any number of phones to communicate over any IP address structure. This means you can use any number of subnets on which you may place phones.

2. There aren't really any IPsec issues, other than the delay that can be experienced over the Internet. No QoS = potential problems. I've done many setups where folks have used IP Phones over IPsec without trouble. Just keep in mind that the Internet isn't QoS capable, unless you pay someone for it :)

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