CHAPTER25 Routing
Mediant 1000 Gateway & E-SBC | User's Manual
25 Routing
This section describes the configuration of call routing for the Gateway application.
Configuring Tel-to-IP Routing Rules
The Tel-to-IP Routing table lets you configure up to 180 Tel-to-IP routing rules. Tel-to-IP routing
rules are used to route calls from the Tel side to an IP destination.
Configuration of Tel-to-IP routing rules includes two areas:
■ Match: Defines the characteristics of the incoming Tel call (e.g., Trunk Group on which the call
is received). You can configure routing rules with one or more of the following incoming Tel
characteristics:
● Source Trunk Group (from where the call is received)
● Source (calling) and destination (called) telephone number prefix and suffix
● Source and destination Dial Plan tags
■ Action: Defines the action that is done if the incoming call matches the characteristics of the
rule (i.e., routes the call to the specified IP destination). You can configure the IP destination to
one of the following:
● IP address or FQDN.
● E.164 Telephone Number Mapping (ENUM service).
● Lightweight Directory Access Protocol (LDAP). For more information, see LDAP-based
Management and SIP Services and AD-based Routing for Microsoft Skype for Business.
● IP Group. When an IP Group is selected, the device sends the call to the IP address
configured for the Proxy Set that is associated with the IP Group (configured in Configuring
IP Groups). The SRD associated with the IP Group determines the:
◆ SIP Interface (SIP port and control network interface) - important when using multiple
SIP control VLANs
◆ Media Realm (port and network interface for media / RTP voice)
◆ SRD-related features on which the call is routed
If you configure the routing rule to send the call to any destination other than an IP Group (e.g.,
an IP address), you need to select a SIP Interface for the call. If no SIP Interface is selected,
the device uses the SIP Interface associated with the default SRD (Index 0). If you have
deleted this SRD or SIP Interface, for whatever reason, the device drops the call. The SIP
Interface determines many attributes for the destination:
● Device's logical SIP port and network interface through which the call signaling is sent
● Device's logical RTP port and network interface through which the media is sent (Media
Realm)
● Other features that can be configured for the SIP Interface
● SRD. As one of the attributes of a SIP Interface is an SRD and as you can configure
multiple SIP Interfaces per SRD, the specific SIP Interface not only determines the above-
mentioned attributes, but also the SRD for routing the call.
The device searches the table from top to bottom for the first rule that matches the
characteristics of the incoming call. If it finds a matching rule, it sends the call to the IP destination
configured for that rule. If it doesn't find a matching rule, it rejects the call.
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