I got a hold of some Nortel IP phones at work and was doing some reaserch on how to connect them to an Asterisk server. At first I was using them with the UNIStim protocol support in Asterisk, but instead found out that you can download SIP firmware versions for most Nortel and Avaya phones directly from Avaya since they purchased Nortel.

You can <a href="http://support.avaya.com/css/appmanager/public/support/Downloads/P0599/SIP%204.x">get the SIP 4.x firmware here</a>, or browse the other firmwares as well. You do not need a username and password to download them.

<a href="http://blog.michaelfmcnamara.com/2011/01/avaya-ip-1100-series-ip-phone-upgrade-to-sip/">This site can help as well</a>, to get you updated to a SIP firmware from UNIStim firmware and how to configure your TFTP settings.

I needed some more configuration settings in my TFTP DeviceConfig file so this is what I ended up using.
<pre><code>
DNS_DOMAIN archaicbinary.home
SIP_DOMAIN1 archaicbinary.home
SERVER_IP1_1 192.168.XXX.XXX
SERVER_PORT1_1 5060
SERVER_RETRIES1 3
DEF_USER1 6001
ENABLE_SERVICE_PACKAGE YES
ENABLE_3WAY_CALL YES
TRANSFER_TYPE STANDARD
REDIRECT_TYPE RFC3261
FORCE_BANNER YES
BANNER YourName
UPDATE_USERS NO
ENABLE_UPDATE YES
ENABLE_PRACK YES
RTP_MIN_PORT 50000
RTP_MAX_PORT 50100
SIP_PING YES
AUTOLOGIN_ENABLE YES
DEF_LANG English
VMAIL *98
VMAIL_DELAY 300
EXP_MODULE_ENABLE YES
ENABLE_BT YES
DST_ENABLED YES
TIMEZONE_OFFSET -18000
# (GMT-10:00) Hawaii -36000
# (GMT-09:00) Alaska -32400
# (GMT-08:00) Pacific time (US and Canada) -28800
# (GMT-07:00) Mountain time (US and Canada) -25200
# (GMT-06:00) Central time (US and Canada) -21600
# (GMT-05:00) Eastern time (US and Canada) -18000
# (GMT-04:00) Atlantic time (US and Canada) -14400
# (GMT-03:00) Brasilia, Buenos Aires -10800
# (GMT+00:00) Greenwich, Dublin, London 0
# (GMT+01:00) Amsterdam, Madrid, Paris	3600
# (GMT+02:00) Athens, Istanbul	 7200
# (GMT+03:00) Moscow, St. Petersburg 10800
# (GMT+05:30) Bombay, Calcutta, Madras	 18000
# (GMT+08:00) Beijing, Chongqing, Hong Kong	28800
# (GMT+09:00) Osaka, Sapporo, Tokyo, Seoul 32400
# (GMT+10:00) Canberra, Melbourne, Sydney 36000
# (GMT+12:00) Auckland, Wellington 43200
SNTP_ENABLE YES
SNTP_SERVER pool.ntp.org
AUTO_UPDATE YES
AUTO_UPDATE_TIME 3600
# 48600 = 1:30pm
# 3600 = 1:00am
# 28800 = 8:00am 29700
# 54900 = 3:15pm
AUTO_UPDATE_RANGE 1
MAX_INBOX_ENTRIES 50
MAX_OUTBOX_ENTRIES 50
MAX_REJECTREASONS 5
MAX_CALLSUBJECT 5
IM_NOTIFY NO
IM_MODE DISABLED
DEF_DISPLAY_IM NO
MAX_IM_ENTRIES 20
MAX_ADDR_BOOK_ENTRIES 100
ADDR_BOOK_MODE BOTH
RECOVERY_LEVEL 0
ADMIN_PASSWORD 123456789
DISABLE_PRIVACY_UI YES
LOGOUT_WITHOUT_PASSWORD NO
NAT_SIGNALING NONE
NAT_MEDIA NONE
HOLD_TYPE RFC2543
</code></pre>