This could be a helpful configuration for those who needs to connect two places, lets said in two differents countries, without a PBX to manage the calls. It’s pretty straightforward, but it’s not very safe.
The scenario: Two SPA3102, each one in a different location and connected to a PSTN. I going to skip the basic configuration part (enable web interface, fixed ip address, enable bridge mode).
LINE1 tab
1.- Enable the Line1, the fxs port.
Advanced -> Voice -> Line 1 -> Line Enable -> Yes
2.- Check the port and transport. Could be any port, but remenber because needs to fit with options in the dialplan.
Advanced -> Voice -> Line 1 -> Sip Settings
3.- Enable make and answer call withou registry:
Advanced -> Voice -> Line 1 -> Proxy and Registration
Make Call Without Reg: Yes Ans Call Without Reg: Yes
4.- Add an user to manage this line: usrLine1Loc01
Advanced -> Voice -> Line 1 -> Subscriber Information -> User ID
5.- Create a Dialplan to be able to make calls through the remote PSTN, and enable Ip Dialing, this feature will enable the SPA to dial using IP addresses rather than SIP URIs which is ideally what should be used.
Advanced -> Voice -> Line 1 -> Dial Plan
(S0<:Usr-Pstn-Loc02@IP-Location02:Port-Loc02-PSTN>) (S0<:UsrPstnLoc02@192.168.2.242:5061>)
S0 = Dial Immediately UsrPstnLoc02 = Remote PSTN user 192.168.2.242 = Remote IP 5061= Remote PSTN port
SPA3102-LOC01
PSTN
1.- Enable the PSTN, the fxo port.
Advanced -> Voice -> PSTN -> Line Enable -> Yes
2.- Check the port and transport. Should be noted that the port is different of the line1.
Advanced -> Voice -> PSTN -> Sip Settings
3.- Enable make and answer call withou registry:
Advanced -> Voice -> PSTN -> Proxy and Registration
Make Call Without Reg: Yes Ans Call Without Reg: Yes
4.- Add an user to manage this line: usrLine1Loc01
Advanced -> Voice -> PSTN -> Subscriber Information -> User ID
5.- Create a Dialplan to be able to make calls through the remote PSTN, and enable Ip Dialing, this feature will enable the SPA to dial using IP addresses rather than SIP URIs which is ideally what should be used.
Advanced -> Voice -> PSTN -> Dial Plans
# You could use any dialplan but 1, because most of the default settings are routed to it. Dial Plan 2: (S0<:Usr-Line1-Loc2@IP-Location02:Port-Line1-Loc02>) Dial Plan 2: (S0<:UsrLineLoc2@192.168.2.242:5060>)
6.- Make sure you are able to make calls from VoIP to PSTN. Besides this we’ll take some security measures, because if we do not, anyone just setting an IP/Soft phone with the SPA IP address will be able to make calls through the PSTN.
Advanced -> Voice -> PSTN -> VoIP-To-PSTN Gateway Setup
VoIP-To-PSTN Gateway Enable: Yes Line 1 VoIP Caller DP: 1 VoIP Caller Default DP: 1 # Security hardening VoIP Caller Auth Method: PIN Should enter a PIN number after a set of beeps to access the PSTN. After 3 failed attempts, cannot reach the PSTN. VoIP PIN Max Retry: 3 Making an IP address access list to allow the SPA located in Loc2 to bypass the PIN number. VoIP Access List: 192.168.2.242 Add the pin number to access VoIP Caller 1 PIN: 1234
7.- Make sure you are able to make calls from PSTN to VoIP.
Advanced -> Voice -> PSTN -> PSTN-To-VoIP Gateway Setup
PSTN Ring Thru Line 1: yes PSTN Ring Thru Line 1: no # Set yes if you want ring the phone locally, you will need a phone in the fxs port. PSTN Caller Default DP: 2 # Or whatever dialplan number you choose PSTN CID For VoIP CID: yes # Enable who's calling; Caller ID
8.- Set the delay to PSTN answer the call to 1, with this value the SPA will have enough time to get who is calling, otherwise we won’t know who is calling.
Advanced -> Voice -> PSTN -> FXO Timer Values (sec)
PSTN Answer Delay: 1
9.- Set the Disconnect Tone
Advanced -> Voice -> PSTN ->PSTN Disconnect Detection
US: 480@-30,620@-30;4(.25/.25/1+2) UK: 400@-30,400@-30; 2(3/0/1+2) France: 440@-30,440@-30; 2(0.5/0.5/1+2) Germany: 440@-30,440@-30; 2(0.5/0.5/1+2) Netherlands: 425@-30,425@-30; 2(0.5/0.5/1+2) Sweden: 425@-10; 10(0.25/0.25/1) Norway: 425@-10; 10(0.5/0.5/1) Italy: 425@-30,425@-30; 2(0.2/0.2/1+2) Spain: 425@-10; 10(0.2/0.2/1,0.2/0.2/1,0.2/0.6/1) - Telefonica Portugal: 425@-10; 10(0.5/0.5/1) Poland: 425@-10; 10(0.5/0.5/1) Denmark: 425@-10; 10(0.25/0.25/1) New Zealand: 400@-15; 10(0.25/0.25/1) Australia: 425@-13; 10(0.375/0.375/1) Argentina: 425@-30,425@-30;4(.3/.2/1+2) Venezuela: 425@-30,425@-30;4(.5/.5/1+2) - CANTV This values is for the local and most used telephones companies, for example in Spain depending on the phone company you will have a different disconnection tone.
The configuration will be the same in both devices, changing the IP address, the users and the values for specific countries if applies.
NOTE: You should open and forward to the device’s IP the following ports in the firewall/router in both sides to allow the communication between the devices.
LINE1: 5060
PTSN: 5061
RTP (voice): From 16384 to 16482. This values could be changed in:
Advance-> Voice -> SIP -> RTP Parameters
There is another way to do this, is configuring a stunserver (could be yours or a public one), doing NAT but this will be for another post.
References:
SPA3102
General – Basic settings
Click to access spa3102_quick.pdf
http://www.cisco.com/en/US/products/ps10024/products_qanda_item09186a0080a359dd.shtml
http://www.cisco.com/c/en/us/support/docs/unified-communications/spa3102-voice-gateway-router/108725-pqa-108725.html
DialPlan
http://www.cisco.com/c/en/us/support/docs/collaboration-endpoints/spa901-1-line-ip-phone/108747-pqa-108747.html
http://voicent.com/predictive-dialer/blog/index.php/predictive-dialer/380/spa3102-dial-plan
http://kb.linksys.com/Linksys/ukp.aspx?vw=1&docid=97e3dc8f2ce6498285a3bfedd92195db_5212.xml&pid=80&respid=0&snid=4&dispid=0&cpage=search
http://wiki.voip.ms/article/Dial_Plan_for_Linksys_ATAs
Connecting Spa
http://www.forowifi.com/forum/showthread.php?t=80
Click to access spa_backtoback_2x_spa3000.pdf
https://community.linksys.com/t5/VoIP-Adapters/Connect-back-to-back-2-SPA-3102/td-p/188833
http://voicent.com/predictive-dialer/blog/index.php/predictive-dialer/380/spa3102-dial-plan
http://kb.linksys.com/Linksys/ukp.aspx?vw=1&docid=97e3dc8f2ce6498285a3bfedd92195db_5212.xml&pid=80&respid=0&snid=4&dispid=0&cpage=search
silvinux 
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