Re: [asterisk-users] Re: Question about DSP in Digium card
On Mar 27, 2007, at 8:35 AM, Salvatore Giudice wrote: As for the DSP, you are right to be concerned about the Digium cards, but not because of the DSP. The DSP is not where you will run into problems. Digium cards feature 2 year old circuitry and do not play well with other devices. You have to take care not to share interrupts with any components that may be active on that system. Sharing an IRQ between a Digum card and an Ethernet card would certainly spell disaster in my experience. From personal experience, I no longer use Digium hardware since I could rarely push a quad port card to more than 13 channels per T1 circuit without the card failing miserably. HDLC aborts abound. FWIW, there have been some recent improvements in the drivers and firmware which correct most of the old IRQ sharing and HDLC problems of that nature. If you have any more such problems, be sure to let tech support know so we can get it fixed. We are anxious to keep your business. Matthew Fredrickson ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [asterisk-users] Re: Question about DSP in Digium card
You've got a decent server. Generally the limiting factor for the number of simultaneous calls is more about server memory. That server could likely handle 124 simultaneous calls, but you would be prudent to double that memory size. Make sure you are running at 100 full especially if you are using G.711. 10 Full uplinks won't cut it if you are running that kind of bandwidth. As for the DSP, you are right to be concerned about the Digium cards, but not because of the DSP. The DSP is not where you will run into problems. Digium cards feature 2 year old circuitry and do not play well with other devices. You have to take care not to share interrupts with any components that may be active on that system. Sharing an IRQ between a Digum card and an Ethernet card would certainly spell disaster in my experience. >From personal experience, I no longer use Digium hardware since I could rarely push a quad port card to more than 13 channels per T1 circuit without the card failing miserably. HDLC aborts abound. For now, I only use Sangoma cards. These don't have the IRQ issues and I have had no problems pushing their cards to their maximum. I recommend echo canceller enabled cards for any T1/E1's you may use that are not long distance carrier lines. Good luck, hope this helps with your capacity planning. - SG ## 2007/3/24, A. Levy <[EMAIL PROTECTED]>: Hello. I have a TE405P Digium Card (4 E1's) with ISDN protocol and I need to find out if there is any limitation about DSP capabilities, I mean, I am not sure how many phone calls my Digium card supports, simultaneously. The calling flow goes from IAX <-> ISDN. I am running this card into CPU like this: - Micro PIV 3.0 - 1Gbyte Memory Thanks. Levy.- ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [asterisk-users] Re: Question about DSP in Digium card
Whether it is IAX, SIP, H323 or ? These are authentication handshakes to establish an rtp stream. SIP = user name and password in a standardized IP packet IAX = same H.323 = same Is also has to do with what codec are supported as well. As far as NAT is concerned! Yep, tell your ISP to forward the authentication port or just junk their gear and get something like a low end Cisco. Or Get IP Phones with STUN (a little pricey) Or Trick Use some type of tunneling gear to an outside IP (outside your NAT) and then bounce your authentication from this new gateway!!! i.e. establish a VPN connection to an outside router from an internal router and drive the call through there. Brad _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of A. Levy Sent: Tuesday, March 27, 2007 6:54 AM To: asterisk-users@lists.digium.com Subject: [asterisk-users] Re: Question about DSP in Digium card well, ...,we did not choose SIP because our customers are located behind NAT router (using private IP's) and those routers are not managed by them but by the ISP so it is very difficult to establish full duplex phone calls because you can not initiate voice over ip session from the internet (outside) to LAN side (inside) with private IP's. We could not establish 2-way phone calls, I mean, the conversation is listened in 1-way only. As I mentioned before, we can not configure PAT into the NAT router neither because is handled by the ISP and the passwords are unknown That's why we decided to use IAX instead of SIP, I mean, IAX is more robust than SIP when the NAT router is 3th-party managed and the PAT feature is not enable. On the other and we tested IAX over dialup links and it worked fine Those are the reasons we choose IAX as "acess protocol" to our SIP/H323 Network. You know, the access networks of the customers are different completely: Private IP Address over DSL lines (NAT Router), Public IP Address over DSL lines, Corporate Networks over dedicated Links (Public and IP Addresses), Dialup links, .. Any comment would be welcomed, thanks a lot Levy.- 2007/3/24, A. Levy <[EMAIL PROTECTED]>: Hello. I have a TE405P Digium Card (4 E1's) with ISDN protocol and I need to find out if there is any limitation about DSP capabilities, I mean, I am not sure how many phone calls my Digium card supports, simultaneously. The calling flow goes from IAX <-> ISDN. I am running this card into CPU like this: - Micro PIV 3.0 - 1Gbyte Memory Thanks. Levy.- ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
