[Asterisk-Users] Cisco 7960 SIP registration???

[List Receiver]

So, here's my quandary:

1) Asterisk running CVS HEAD as of a couple days ago
2) Cisco 7960 SIP phones in a different subnet than the Asterisk server
3) NAT/Firewall device between 7960's and *

I can initiate a call from the 7960's just fine.  They can call out
using our Broadvoice account and access any of the vmail stuff on *.
When calling in from the outside world and dialing one of their
extensions, however, I always get a "this user is on the phone" message.

The console spits out this nugget:
  == CDR updated on SIP/4252780761-933d
    -- Executing Macro("SIP/4252780761-933d", "stdsip|tycisco|101") in
new stack
    -- Executing Dial("SIP/4252780761-933d", "SIP/tycisco") in new stack
Apr 20 08:14:59 NOTICE[32728]: app_dial.c:973 dial_exec_full: Unable to
create channel of type 'SIP' (cause 3)
  == Everyone is busy/congested at this time (1:0/1/0)

A showing of the sip peers:
sip show peers
Name/username              Host            Dyn Nat ACL Mask
Port     Status
rickcisco/cisco2           (Unspecified)    D   N      255.255.255.255
0        UNKNOWN
tycisco/cisco1             (Unspecified)    D   N      255.255.255.255
0        UNKNOWN
sip.broadvoice.com/425278  147.135.4.128               255.255.255.255
5060     OK (127 ms)
3 sip peers [1 online , 2 offline]

I'm sure the reason I can't call to an extension is that they are
appearing offline.  How can I remedy this, however?

I'm an * newbie, so go easy on me.  :^)

Thanks,
 
Ty Christensen
MCP, MCSP, MCSB
Master Mind Productions Inc.
www.mastermindpro.com <http://www.mastermindpro.com/> 
(425) 378-7724