
External SIP Peer  Device Management
Polycom, Inc.  101
Authentication  On this tab, you can configure SIP digest 
authentication, as specified in RFC3261, for this SIP 
peer and add or edit authentication credentials. 
SIP authentication must be enabled and configured on 
the Device Authentication page. 
Note: The digest authentication settings for this peer 
are used only in conjunction with a dial rule specifying 
the Resolve to external SIP peer action. If another dial 
rule action, such as Resolve to external address, is 
applied to the call, there is no association to this peer 
and its authentication settings aren’t used. 
Authentication Select one: 
•Handle authentication — When it receives a 401 
(Unauthorized) response from this SIP peer, the 
Call Server presents its authentication credentials. 
•Pass authentication — When it receives a 401 
response from this SIP peer, the Call Server passes 
it to the source of the request. 
Note: SIP authentication requests are never passed to 
an H.323 endpoint (a gateway call). If the Call Server 
can’t provide the required credentials, the call fails. 
Proxy authentication  Select one: 
•Handle proxy authentication — When it receives a 
407 (Proxy Authentication Required) response from 
this SIP peer, the Call Server presents its 
authentication credentials. 
•Pass proxy authentication — When it receives a 407 
response from this SIP peer, the Call Server passes 
it to the source of the request. 
Note: Authentication requests are never passed to an 
H.323 endpoint (a gateway call). If the Call Server can’t 
provide the required credentials, the call fails. 
(table of authentication 
entries) 
Lists the authentication credential entries defined for 
use with this SIP peer, showing the realm in which the 
entry is valid and the user name. Click Add to add 
authentication credentials. 
When choosing authentication credentials to present to 
this SIP peer, the Call Server looks first at the entries 
listed here. If there is none with the correct realm, it 
looks for an appropriate entry on the Device 
Authentication page. 
External Registration  Lists any outbound registration configurations 
associated with this SIP peer and lets you add, edit, or 
delete registrations. Multiple registrations may be 
associated with a SIP peer. 
Table 5-14 Add External SIP Peer dialog box 
Field  Description