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Polycom, Inc. 106
Prefix range The dial string prefix(es) assigned to this SIP peer.
Enter a single prefix (44), a range of prefixes (44-47), or multiple prefixes
separated by commas (44,46)
If your dial plan uses the Dial services by prefix dial rule (in the default dial
plan) to route calls to services, all dial strings beginning with an assigned
prefix are forwarded to this SIP peer for resolution.
If your dial plan instead uses a rule that you create to apply the Resolve to
external SIP peer action, there is no need to specify a prefix.
Otherwise, the system applies the SIP Routing settings of the originating site
(see Sites and Edit Site Dialog) for calls to endpoints outside the enterprise
network.
Note: For a SIP peer, the dial string must either include the protocol or consist
of only the prefix and user name (no @domain). For instance, if the SIP peer’s
prefix is 123, the dial string for a call to alice@polycom.com must be one of
the following:
sip:123alice@polycom.com
sips:123alice@polycom.com
123alice
Strip prefix If selected, the system strips the prefix when a call that includes a prefix is
routed to this peer.
Register externally Some external SIP peers require peers to register with them as an endpoint
does, using a REGISTER message (also referred to as pilot registration).
Select this option to enable the External Registration tab and configure the
system to register with this external SIP peer, following the rules specified in
RFC 3261.
Supports SIP OPTIONS ping If selected, the system sends SIP OPTIONS ping messages to the SIP peer
to determine its responsiveness. See the Admin > Call Server > Call Server
Settings page for configuration options related to SIP OPTIONS ping
messages.
Domain List If your dial plan uses a rule to apply the Resolve to external SIP peer action,
you can restrict calls to this SIP peer to specific domains by adding the
authorized domains to this list.
If this list is empty, all domains can resolve to this peer.
Note: In some circumstances (depending on network topology and
configuration), dialing loops can develop if you don't restrict SIP peers to
specific domains.
Add new domain Enter a domain and click Add to add it to the list of authorized domains.
Authorized domains List of administrative domains, contained in the dial string, for which calls are
routed to this SIP peer.
Leave this list empty to route any call that matches the rule to this SIP peer.
Select a domain and click Remove to remove it from the list.
Field Description