Cisco 3521 Administrator's Manual page 100

Configuring Gateway Settings
In the Signaling Protocol field, choose the signaling protocol used to setup and tear down calls through
Step 6
the signaling (D) channel. Depending on the interface used, different signaling protocols are available
for selection.
In the PCM Audio Format field, choose the desired G.711 audio standard: A-Low or U-Low.
Step 7
Note
In the Directory Numbers section, enter the phone numbers for the BRI line in the Number 1 and
Step 8
Number 2 fields.
Click SPIDs to configure Service Profile Identification (SPID) values for this BRI line. The SPID value
Step 9
is provided by the telecom company and indicates which services a specified BRI line supports (for
example, phone, fax, or videoconferencing facilities).
Note
The SPIDs dialog box appears.
Step 10 In the Number of SPIDs field, choose the required number of SPID values.
In the SPID 1 field, enter the first SPID value.
Step 11
In the SPID 2 field, enter the second SPID value.
Step 12
Click OK to upload these changes to the gateway database and close the SPIDs dialog box.
Step 13
Click Advanced to enable or disable alerting, Layer 1 line hunting, or configure a static Terminal
Step 14
Equipment Identifier (TEI).
The Advanced dialog box appears.
Select the Enable Alerting check box for the gateway to connect a voice call that is not rejected (instead
Step 15
of sending alert messages to the caller).
The alerting feature is relevant for incoming voice calls routed directly to an endpoint (through DID) or
to a default extension. When you select this option, the gateway sends an alert message to the dialing
ISDN terminal if the call is not connected within a few seconds. This informs the ISDN terminal that the
call is not yet connected to the local IP endpoint. As a result, the ISDN terminal continues to hear a
ringing sound until the gateway connects to the call.
Note
This setting is selected by default. Unselect it to prevent the gateway from sending an alert message.
Select the Enable Layer 1 Line Hunting check box if you do not want the gateway to hunt BRI lines
Step 16
whose Layer 1 is not activated. This setting is unselected by default.
Administrator's Guide for Cisco IPVC 3521 BRI Gateway, Cisco IPVC 3526 PRI Gateway, and Cisco IPVC 3540 PRI Gateway
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You can only make this setting if you select Taiwan in the Country field. Skip to step 8
otherwise.
You can only configure SPID values if you select DMS100, National ISDN, or 5ESS
Custom/Multipoint options in the Signaling Protocol field of the Physical Interface section,
and when the Country field is set to US. Skip to step 14 otherwise.
The gateway connects the call even if the endpoint on the local IP network has not yet accepted
it. If the IP endpoint does not accept the call, the call is rejected and immediately disconnects
from the ISDN terminal.
Chapter 3 Configuring the Cisco IPVC 3500 Series Gateway
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