Unable to Make Outbound Call
Document ID: 108984
Contents
Introduction
What do I do if I am unable to make outbound calls from the device?
Related Information
Introduction
This document is one in a series to assist in the setup, troubleshooting, and maintenance of Cisco Small
Business products.
Q. What do I do if I am unable to make outbound calls from the device?
A. These are the parameters you need to check if you cannot make outbound calls from the
SPA−942.
1. Verify the complete network connection. If the SPA−942 is connected to an
SPA−9000, make sure that the VoIP account is properly configured on the
SPA−9000. Since the SPA−9000 automatically provisions SPA942, you do not need
to configure the settings on the SPA−942. If the SPA−942 is registered directly to
your VoIP provider, make sure that the username and password is properly
configured on the device. Verify also the Proxy and Outbound Proxy (if the VoIP
provider requires Outbound Proxy).
Parameters to Check on SPA9000
2. Under the Line tab of the SPA9000, look for Subscriber Information in order to
check if you have the correct User ID and Password.
3. Under the Info tab, check for Line 1−4 Status, as at least one of these lines should
show that Registration State as Registered.
Parameters to Check on SPA9xx Series Phone
Complete these steps:
1. Check your SPA9xx IP address. You can obtain the IP address through the LCD
screen on the IP phone. Press the Setup Button, then press 9. The LCD screen
displays the current IP address.
2. Launch your browser, type http://IP_Address_of_your_SPA9xx in the address
field, and hit Enter.
You are now ready to configure the SPA9xx for Network Address Translation
(NAT). If the web interface is asking for a username and password, this means that
the unit was locked by your Provider. Contact your respective VoIP Provider for
assistance.
Enable NAT Support Settings
Complete these steps:
1. You can set NAT Mapping Enable and NAT Keep Alive Enable to yes under the
EXT1 tab of the SPA.
Click Submit All Changes.
2. Alternatively, if the SIP server registering the SPA9xx supports NAT, you can use
the Outbound Proxy configuration of the SPA in order to connect to it.
3. SPA product also supports STUN (Simple Traversal of UDP through NAT) protocol.
Under the SIP tab, look for NAT Support Parameters. In the STUN Server field,
enter your STUN server address, set both Substitute VIA Addr and STUN Enable to
yes. Place your WAN IP address on EXT IP.
Click Submit All Changes.
Note: STUN will not work if you have a symmetric NAT. If you enable the debug
through syslog and set STUN Test Enable to yes, the SPA product will print
information about whether or not you have a symmetric NAT.
On your NAT, you need to unblock UDP ports 5060, 5061, and the port range from
16384−16482. You might also need to disable "SPI" if there is such a function in
your firewall.
Related Information
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Updated: Dec 12, 2008
Document ID: 108984