Problem with Sip File

I have Asterisk 1.4.4 runinng and just starting to configure it. I have 2 SIP phones, one a X-Lite connected to a Windows PC and a Polycom phone. I have both phones set up, but when I try to dial the other I get no ring and the other phone does not ring. What could be going on. Here is my sip.conf

; …

context=default ; default context for incoming calls
; realm= ;
bindport=5060 ; UDP Port to bind
bindaddr= ; IP address to bind to ( binds to all)
; domain=
srvlookup=yes ; Enable DNS SRV lookups on outbound calls
disallow=all ; First disallow all codecs
allow=ulaw ; allow codecs in order of preference
language=en ; Default language

; **********************************8
; ** Register Statements

; ** Friends, users and Peers

[ts_xlite] ; (Tom Smith’s Xlite phone).
type = friend
host =
secret = xlite
context = users

[jj_polycom] ; (Joe Jones’ Polycom Phone
type = friend
host =
secret = polycom
context = users

I had define the hosts in order for them to be “online” using the sip show peers command. What have I done wrong. Thank you.

you can look at this page,maybe

I figured it out. It was in the configuration of the X-Lite and Polycom phone. Have to get the Asterisk server correct.
Thank you,