User's Manual

Nortel Product Bulletin# P-2007-0235-Global – Rev 1
SIP URI Dialing
The SIP Firmware Release 1.1 for IP Phone 1120E and 1140E supports URI dialing.
Some Communication Servers may not support URI dialing and in such cases, attempt
to make calls from the Call softkey menu of SIP Firmware may not complete and users
may get an error message. In addition, as a valid URI is to be entered for monitoring a
user’s presence state the presence state/updates may not be reflected accurately with
Communication Servers that may not support URI.
SIP User Identification
The SIP Firmware Release 1.1 for IP Phone 1120E and 1140E supports a maximum
length of 18 characters for the SIP User Id. When assigning the SIP User ID, please
ensure it is limited to a maximum of 18 characters.
Automatic Call Back/Automatic Recall (ACBAR)
The SIP Firmware Release 1.1 for IP Phone 1120E and 1140E supports Automatic Call
Back(ACB) and Automatic Recall (AR) with certain Nortel Communication Servers i.e.
CS2000/CS2100. ACB places a call to the last outgoing number dialed by the user.
When a user calls a line that is busy, the ACBAR service notifies the user that the line is
busy and offers the user the option to monitor the destination line. Once the destination
line is free, the call is placed again. Automatic Recall (AR) places a call to the last
incoming caller to a user. Please note ACBAR service needs to be provisioned on the
Communication Server.
DHCP
When a DHCP server has to issue a new IP address to the IP Phone 1120E or 1140E
after a lease expires, the IP Phone may go through a reboot and recover process and
this process may take up to five minutes for the IP Phone to get back to its ready state to
make/receive calls. In addition, if a user is on a call, the call may be dropped and the IP
Phone may go through the reboot and recover process.
If the DHCP lease expires, the
IP Phone must initiate a new negotiation of an IP address from the server's pool of
addresses. DHCP lease may expire so the network does not run out of IP addresses or
due to instability in the network. DHCP lease expiration is not a common event.
Nortel Product Bulletin# P-2007-0235-Global – Rev 1 Page 19 of 20