03-29-2009 05:17 PM - edited 03-15-2019 05:09 PM
I need to put together a two site, two UC500 based system and this is something I haven't done before. Looking for some tips on how to best architect this. One site is significantly larger than the other (64U UC500 and 16U UC500) and both will have PRI PSTN connections and QoS enabled MPLS data circuits between them. I guess I would start with the dialing plan. Should I use 3 or 4 digit extensions? What other issues will I have to deal with and/or plan for?
Thanks,
Diego
Solved! Go to Solution.
03-31-2009 06:44 PM
Hi Diego,
SIP and H323 dial peers are actually very similar - the only difference is that SIP dial peers have the 'session protocol sip' command. The default is H323.
-nick
03-29-2009 08:48 PM
Hi Diego,
The largest problem seen with implementations like this is addressing. Since the UC520 comes with a fully loaded config, most people do not change the addressing. This causes a problem later on when you have overlapping IP addresses. This is especially common with CUE.
Otherwise, it should be fairly straight forward. Make sure you do not have overlapping DNs at either site (causes problems with leaving voicemails), and run either a SIP or H323 connection between the two sites. Most people find H323 to have less problems.
You will probably want to create two or three extra dial peers on each UC520:
1) Site to site extensions
2) Site to site voicemail/AA - may be the same as 1)
3) Failover site PSTN dial peers with a higher preference than the local pots dial peers.
hth,
nick
03-30-2009 02:42 PM
I usually redo the UC500's so IP addresses won't be a problem. What do you mean by overlapping DNs? I plan to use 2xx for extensions at one site and 3xx for the other. That should be OK, no? Lastly, can you point me to a H323 example for site-to-site? I am only familiar with SIP.
Thanks,
Diego
03-30-2009 02:49 PM
Hi Diego,
If you're familiar with SIP, you can use that. If you don't want to, H323 is very very similar.
dial-peer voice 1 voip
session target ipv4:1.1.1.1
dtmf-relay h245-alpha
codec g711u
no vad
destination-patter 1...
voice service voip
allow h323-to-h323
no supp h450.2
no supp h450.3
no supp h450.12
hth,
nick
03-31-2009 04:18 PM
What makes that dial-peer example H323? The codec value?
Thanks,
Diego
03-31-2009 06:44 PM
Hi Diego,
SIP and H323 dial peers are actually very similar - the only difference is that SIP dial peers have the 'session protocol sip' command. The default is H323.
-nick
04-01-2009 07:13 AM
Cool, thanks,
Diego
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