In article <6c6f07p6g03574vltab2u6kisg6rs2i2q8@4ax.com>,
Anthony R. Gold <tgold@panix.com> wrote:

>New question: is there any limit to the number of SIP devices or softphones
>that may be connected to one home LAN? Is it useful for different ones be set
>to different UDP port numbers? And if so, what is the range of port numbers
>that are generally accepted?

Within reason, no... However who knows what a reasonable limit is.

Factors that will affect it include the size of the ARP table in your
router and the MAC to port addressing tables in your Ethernet switches.
Also your routers ability to manage NAT sessions too. (And routers with
broken SIP ALGs that are really only expecting one SIP device)

Then there's the DHCP server and your LAN subnet - once you get over
254 devices on one LAN you need a bigger subnet.

Your router doing NAT should give each device it's own outgoing port
number - which is one way NAT uses to map incoming connections to
a device, so you really shouldn't have to fiddle with SIP phones at
that level. (And if you don't have NAT, then there's even less issues)

So basically it's your router and to a lesser extent Ethernet switches
that's going to be the limiting factor.

Gordon