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The ISDN PRI Configuration page allows you to configure ISDN PRI on 

To Configure ISDN PRI 

1. Navigate to Network > ISDN > Configuration.

2. Select the Enable ISDN PRI checkbox and click Submit to activate fields on the ISDN PRI Configuration page.
   
   
   

   
   

3. Configure settings using the information in the following table as a guide. When you finish configuring settings, click Submit to make your changes take effect. For more information on submitting your configuration changes, refer to Submit Configuration Changes.
   

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   0 Table 1 ISDN PRI Configuration Parameters
   Item Configuration Enable ISDN PRI Select the Enable ISDN PRI checkbox to enable service. Select PRI Line Choose a T1/E1 line for ISDN PRI from the Select PRI Line drop-down list. The valid range is 1-4 based on the number of T1/E1 lines available on a given Spacevars 0 product2 platform. Configure each T1/E1 separately. Trunk Switch Type Enter the switch type that  Spacevars 0 product2 will be simulating. NI2 or E1 is selected by default. The switch type must match the peer-switch type to which this interface is connected. D Channel Select a number from the D Channel drop-down list to use for Q.931 signaling. The default is 24 (T1) or 16 (E1). Enable Overlap Receive Enable Overlap Digit Receive from the user (client) side. All digits are collected and sent en bloc in the outgoing INVITE message on the SIP side. All Network to User calls are sent en bloc, with the Sending Complete IE added in the SETUP message.  Device Name Define a device name that is used as SIP FROM user, in case the Calling User information is unavailable on the call coming into the PRI trunk from the remote PRI T1/E1 link. B Channel order descending (Optional) By default, B-channel order is ascending (1-24 for T1 and 1-31 for E1) when performing a call setup. If the B Channel order descending check-box is selected, B-channel ordering is set to descending (24-1 for T1 and 31-1 for E1). Internal Clocking Set the clocking mode for PRI. Select the Internal Clocking checkbox to set the clocking mode to Internal. External clocking is used by default. International Prefix Enter a value to prepend a prefix to incoming international PRI calls. If the field is empty or a prefix is already part of the called number, no action is taken. Jitter Buffer (MS) Enter the jitter buffer value based on the IP network condition. Valid values are equal to or greater than 40 milliseconds (msecs). The default value is 100 msecs. Jitter Type Choose the Jitter buffer type from the drop-down list: • Fixed • Adaptive By default, the Jitter Type is set to Fixed. TX Gain to PRI Trunk from IP Choose a transmit gain value from the TX Gain to PRI Trunk from the IP drop-down list. The selected TX Gain is effective on the media packets (RTP) received from the IP side before being forwarded to T1 channels by DSP.  The default setting is 0 DB. RX Gain from PRI Trunk to IP Choose a receive gain value from the RX Gain from PRI Trunk to IP drop-down list. The selected RX Gain is effective on the TDM frames received from the T1 side before being forwarded to T1 channels by DSP. The default setting is 0 DB. Register with SIP Server (Optional) Select the Register with SIP server check-box to register with the SIP server using the “Register FROM Username” as the SIP user name. If registration needs to be authenticated, provide the 'SIP Authentication name' and the 'SIP password'. Register/Override FROM Username (To IP network) Enter a name to override the system default DISPLAY name when sending a SIP request to the IP side. A call coming from the ISDN side is terminated on an IP network. By default, the gateway uses the PRI callerID in the FROM field of the SIP INVITE message when terminating a call on the IP side. If the callerID is absent, the gateway uses the specified internal name. When this field is defined, PRI/GW registers with this name. Define 'SIP Authentication Name' and 'SIP Password' if the name needs to be authenticated. SIP Authentication Name (Optional)  Enter the SIP authentication name used to authenticate the PRI/GW if the gateway registers with the name defined in the Register FROM Username field. SIP Password (Optional) Enter the SIP authentication password used to authenticate the PRI/GW if the gateway registers with the name defined in the Register FROM Username field. Override FROM Display Name (To IP Network) Enter a name to override the DISPLAY name when sending SIP requests to the IP side. An Inbound call coming into PRI/GW from the remote PRI/T1 link is terminated on an IP network. By default, the gateway uses this name as part of the DISPLAY name in the SIP FROM header. Disable sending Calling Name in Display IE Setting applies only to the EURO PRI switch type. When checked, the display name is not sent in DISPLAY_IE as part of the Q.931 SETUP message. By default, the display name of the calling party is sent using DISPLAY_IE in the SETUP message. Codec Preference  Select the preferred codec. When making a call, this codec will be the first codec offered. When receiving a call, if this codec is part of the negotiated codec list, then this codec will be used to encode and send voice packets. Use Preferred Codec Only Select the Use Preferred codec only checkbox to use your selected codec preference as the only codec offered or responded to in the call setup. All other calls are rejected. Send CONNECT after Early Media This is relevant when making outbound calls from PBX to PRI. When enabled, PRI sends CONNECT to the PBX after sending the ALERT with Early Media indication. Some PBXs will not cut-through media if CONNECT is not sent after Early Media, and so if a PBX user is trying to access an IVR, DTMF from the PBX user will not be sent to IVR. Handle PROGRESS This is relevant when making inbound calls from PRI to PBX. A PROGRESS message is sent from PBX in response to a PROG indicator in the SETUP message. However, some PBX sends this message regardless. Since SETUP did not ask for PROGRESS, this message is ignored by default. Select the Handle PROGRESS configuration to handle this PBX behavior, so that PROGRESS is handled and an appropriate SIP message is generated. Enable RTCP Select the Enable RTCP checkbox to enable RTCP support for voice media. Enable VAD Select the Enable VAD checkbox to enable Voice Activity Detection (VAD) support for voice media. Enable FAX/MODEM Support When enabled, PRI will monitor FAX/MODEM tones in a voice call. If a tone is detected, PRI will automatically change the voice call to FAX/MODEM data call. To enable T.38 FAX, define the T.38 configuration.  Note: This feature is only relevant for 4800 platforms. Enable V6 Media Support Enabling this option allows V6 media support on PRI. The default value is disabled.  Note: This configuration is only available on  Spacevars 0 product2  4808,  Spacevars 0 product2  4806 and  Spacevars 0 product2  6000 systems. Define configuration for each PRI channel Configure each PRI channel: Enable — Select the Enable checkbox for each PRI channel you want to enable as part of the call. By default, all 23 (T1) or 30 (E1) channels are enabled. Status — In the Status column, observe the current read-only status for all PRI channels: The status of B-channels can be Unknown, Idle, Busy, or Not-connected. The status of the D-channel can be Initializing (the system is initializing to the connected device) or Up (the system has initialized the connection).