[j-nsp] VOIP messages through IPSEC tunnel

[Chuck Anderson]

On Sun, Jan 31, 2010 at 09:40:04AM +0300, Muhammad Rehan wrote:
> For DHCP server i simply enable DHCP relay on both site,but i have a
> confusion regarding IP phones.
> 
> (In normal scnerio I just enter a TN number on my IP phone and it
> automically gather all info from Call manager when I pluged IP phone
> in campus office)

What kind of DHCP server do you have?  You need to send code 128 from 
the DHCP server to the phones.  Here is an example for ISC DHCP:

option space Nortel;
option Nortel.i2004-server-info code 128 = text;
option Nortel.i2004-server-info "Nortel-i2004-A,a.b.c.d:4100,1,10;a.b.c.d:4100,1,10.";
class "Class-Nortel-i2004-A" {
        match if substring (option vendor-class-identifier,0,14) = "Nortel-i2004-A";
        vendor-option-space Nortel;

}

where a.b.c.d is your Call Server Node IP address.