one question about FXS & FXO card ..

I'm new this field so i came up with this question
.. i have 2801 ( with PDVM module installed ) .. what if i don't install fxs and fxo cards in my router ... can i still ESTABLISH the communication between 2 IP Phones in the same subnet .. i'm not calling outside or interested in connecting Analog devices .... i have not tried yet but i think... there shouldn't be any issue .. any thoughts ... ???

Comments
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pitviper Member Posts: 1,376 ■■■■■■■□□□
Sure, you don't need DSP resources for VoIP to VoIP calls unless you're planning on using different codecs (not likely).
You will need them for VoIP to analog connectivity (FXS, FXO, E&M, voice T1/E1 CAS, T1/E1 CCS, and so on). You'll also need them for things like conferencing and transcoding.CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT -
mikem2te Member Posts: 407
I'm new this field so i came up with this question.. i have 2801 ( with PDVM module installed ) .. what if i don't install fxs and fxo cards in my router ... can i still ESTABLISH the communication between 2 IP Phones in the same subnet .. i'm not calling outside or interested in connecting Analog devices .... i have not tried yet but i think... there shouldn't be any issue .. any thoughts ... ???
Blog : http://www.caerffili.co.uk/
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pakidevil Member Posts: 13 ■□□□□□□□□□
@ Mike,
thanks very much man ... i got email from you over the weekend .. sorry for not replying to your email on time but Thanks again ... now, i know where to go for the HELP... one day ... i will be a pro in this area as well ...
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mikem2te Member Posts: 407
I'm new this field so i came up with this question.. i have 2801 ( with PDVM module installed ) .. what if i don't install fxs and fxo cards in my router ... can i still ESTABLISH the communication between 2 IP Phones in the same subnet .. i'm not calling outside or interested in connecting Analog devices .... i have not tried yet but i think... there shouldn't be any issue .. any thoughts ... ???
FXO ports are cool. I have my voice router connected to a SIP gateway and the local PSTN exchange using an FXO port. It's configured to do some least cost routing - local and national calls through the PSTN network. International calls go via SIP. Saves loads of money on calls.Blog : http://www.caerffili.co.uk/
Previous : Passed Configuring Microsoft Office SharePoint Server 2007 (70-630)
Currently : EIGRP & OSPF
Next : CCNP Route -
pakidevil Member Posts: 13 ■□□□□□□□□□
@ Mike,
Your notes on CCNA Voice are simply AWESOME ( A brief history of... ) ... Great contribution ... keep it up ... one thing .. about international calls and routing .. where should i start ... or topics, i need to concentrate ... thanks .. -
mikem2te Member Posts: 407
@ Mike,
Your notes on CCNA Voice are simply AWESOME ( A brief history of... ) ... Great contribution ... keep it up ... one thing .. about international calls and routing .. where should i start ... or topics, i need to concentrate ... thanks ..
In my opinion they are the most interesting topics in CCNA:V.Blog : http://www.caerffili.co.uk/
Previous : Passed Configuring Microsoft Office SharePoint Server 2007 (70-630)
Currently : EIGRP & OSPF
Next : CCNP Route -
pakidevil Member Posts: 13 ■□□□□□□□□□
oke .. i'm able to Establish link between my 2 IP phones and they RING, if i try to call from other IP PHONE ... Also, I have not installed FXO and FXS cards yet .. now the Problem .... when i call and pick up the other phone .. all i hear is weird noise ( like static noise ) plus .. NO TONE .. should i be hearing any TONE ... let me know, if you need to know anything else .. looking forward to your reply ... -
mikem2te Member Posts: 407
oke .. i'm able to Establish link between my 2 IP phones and they RING, if i try to call from other IP PHONE ... Also, I have not installed FXO and FXS cards yet .. now the Problem .... when i call and pick up the other phone .. all i hear is weird noise ( like static noise ) plus .. NO TONE .. should i be hearing any TONE ... let me know, if you need to know anything else .. looking forward to your reply ...Blog : http://www.caerffili.co.uk/
Previous : Passed Configuring Microsoft Office SharePoint Server 2007 (70-630)
Currently : EIGRP & OSPF
Next : CCNP Route -
pakidevil Member Posts: 13 ■□□□□□□□□□
oke... everything is working oke .. now i have heard that you can place cheap international calls via voip ( cisco routers, ip phones ) ... just want to get some idea .. how this thing work .. any hint or idea would be great .. thanks again .. i appreciate ... -
tazdevil Member Posts: 55 ■■□□□□□□□□
Check out magic Jack, just connect to FXO port, and configure up, you will also need a PC running with internet access to get the call out.ICND1 - Passed March 19/2010
ICND2 - Passed April 8/2010 -
pakidevil Member Posts: 13 ■□□□□□□□□□
not interested in magic jack .. i want calls going through my voip router ... -
mikem2te Member Posts: 407
not interested in magic jack .. i want calls going through my voip router ...
Configuring SIP on the router was a challenge though to get it all working correctly.Blog : http://www.caerffili.co.uk/
Previous : Passed Configuring Microsoft Office SharePoint Server 2007 (70-630)
Currently : EIGRP & OSPF
Next : CCNP Route -
peanutnoggin Member Posts: 1,096 ■■■□□□□□□□
Sure, you don't need DSP resources for VoIP to VoIP calls unless you're planning on using different codecs (not likely).
You will need them for VoIP to analog connectivity (FXS, FXO, E&M, voice T1/E1 CAS, T1/E1 CCS, and so on). You'll also need them for things like conferencing and transcoding.
TE, sorry to open an old thread, but I was doing some searching on multiple forums and Cisco's site directly. I'm a bit confused, but I think that the above quote may be my answer... I'm looking for clarification.
On my 1760 routers, I have a VIC-2FXS & a VIC-2FXO installed. The show diag recognizes both cards and lists them in their correct VIC slots on the router, however, the show version does not list the interfaces as being installed. According to Cisco's website, the cards should be displayed. I'm wondering if this is because I do not have any DSPs installed on the 1760. Can someone clarify for me if I need DSPs before the VIC-2FXS or VIC-2FXO card will be recognized by the various show commands? I've also run the show voice summary command and that too returns just the header fields but no voice port information.Any assistance is greatly appreciated. If you need me to post any configs/show outputs, I can do that once I get back home. Thanks in advanced...
-PeanutWe cannot have a superior democracy with an inferior education system!
-Mayor Cory Booker -
mikej412 Member Posts: 10,086 ■■■■■■■■■■
peanutnoggin wrote: »I'm wondering if this is because I do not have any DSPs installed on the 1760. Can someone clarify for me if I need DSPs before the VIC-2FXS or VIC-2FXO card will be recognized by the various show commands?:mike: Cisco Certifications -- Collect the Entire Set! -
peanutnoggin Member Posts: 1,096 ■■■□□□□□□□
Thanks Mikej412,
I've also been looking at this thread regarding DSP Resources. I can purchase the PVDM-12 for my 1760 and get the FXS/FXO ports working? Thanks againWe cannot have a superior democracy with an inferior education system!
-Mayor Cory Booker