Re: IP Telephony SIP [7:64433]
Sprint PCS is in development of their Push to Talk product for walkie-talkie style service for their customers. SIP is being used for call setup and other controll funtions. SIP is running on the handset itself and SIP proxy servers located at Sprint's distribution centers connecting to PTT Aplications Servers. Although troubleshooting becomes easier due to ASCII based messages used for negotiation (easily read with a sniffer), the protocol is heavy for CDMA (LOTS of activity) which is used on the PCS network. Other enhancements are being used to reduce latency with call setup and floor control during a session that ironicly are not SIP based i.e. using the RTP stream for control functions and some fancy buffering to improve the user experience. - Original Message - From: nrf To: Sent: Wednesday, March 05, 2003 9:50 PM Subject: Re: IP Telephony SIP [7:64433] SIP servers - Sonus, Clarent (I think), Nortel, Indigo, guys like that. SIP phones used by providers - practically none. Dont' get me wrong - there are SIP phones out there. But phones are not really the point of SIP. SIP is a generalized control plane that extends far and beyond phones. Right now, SIP is mostly being exploited by mobile carriers for back-end interoperability. SIP is also being exploited to facilitate rich instant messaging (consider RFC 3428). supernet wrote in message news:[EMAIL PROTECTED] Thanks. What SIP servers and SIP phones do service providers use? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of nrf Sent: Tuesday, March 04, 2003 10:03 PM To: [EMAIL PROTECTED] Subject: Re: IP Telephony SIP [7:64433] supernet wrote in message news:[EMAIL PROTECTED] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi You shouldn't compare SIP and CCM. SIP is an industry standard, whereas CCM is a Cisco product. Any vendor, including Cisco, can and has implemented SIP. Only Cisco can 'implement' CCM (after all the first 'C' stands for Cisco). There is a significant amount of SIP in production - almost all of it in service-providers. Most of today's 3G wireless networks, for example, rely on SIP. To make things more confusing, Cisco may implement SIP within CCM soon. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64608t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IP Telephony SIP [7:64433]
My point still stands however - there are few SIP phones out there, and the ones that are being used are almost exclusively being used by the provider. And again, I think looking at SIP just for phones is beside the point. SIP has much more potential. Phones are really just a sideshow for SIP. Art Barrera wrote in message news:[EMAIL PROTECTED] Sprint PCS is in development of their Push to Talk product for walkie-talkie style service for their customers. SIP is being used for call setup and other controll funtions. SIP is running on the handset itself and SIP proxy servers located at Sprint's distribution centers connecting to PTT Aplications Servers. Although troubleshooting becomes easier due to ASCII based messages used for negotiation (easily read with a sniffer), the protocol is heavy for CDMA (LOTS of activity) which is used on the PCS network. Other enhancements are being used to reduce latency with call setup and floor control during a session that ironicly are not SIP based i.e. using the RTP stream for control functions and some fancy buffering to improve the user experience. - Original Message - From: nrf To: Sent: Wednesday, March 05, 2003 9:50 PM Subject: Re: IP Telephony SIP [7:64433] SIP servers - Sonus, Clarent (I think), Nortel, Indigo, guys like that. SIP phones used by providers - practically none. Dont' get me wrong - there are SIP phones out there. But phones are not really the point of SIP. SIP is a generalized control plane that extends far and beyond phones. Right now, SIP is mostly being exploited by mobile carriers for back-end interoperability. SIP is also being exploited to facilitate rich instant messaging (consider RFC 3428). supernet wrote in message news:[EMAIL PROTECTED] Thanks. What SIP servers and SIP phones do service providers use? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of nrf Sent: Tuesday, March 04, 2003 10:03 PM To: [EMAIL PROTECTED] Subject: Re: IP Telephony SIP [7:64433] supernet wrote in message news:[EMAIL PROTECTED] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi You shouldn't compare SIP and CCM. SIP is an industry standard, whereas CCM is a Cisco product. Any vendor, including Cisco, can and has implemented SIP. Only Cisco can 'implement' CCM (after all the first 'C' stands for Cisco). There is a significant amount of SIP in production - almost all of it in service-providers. Most of today's 3G wireless networks, for example, rely on SIP. To make things more confusing, Cisco may implement SIP within CCM soon. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64635t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IP Telephony SIP [7:64433]
Browse thought Cisco's CVoice book or VoIP fundamentals both have sections on SIP or goto to Cisco's website and search for SIP. David nrf wrote in message news:[EMAIL PROTECTED] supernet wrote in message news:[EMAIL PROTECTED] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi You shouldn't compare SIP and CCM. SIP is an industry standard, whereas CCM is a Cisco product. Any vendor, including Cisco, can and has implemented SIP. Only Cisco can 'implement' CCM (after all the first 'C' stands for Cisco). There is a significant amount of SIP in production - almost all of it in service-providers. Most of today's 3G wireless networks, for example, rely on SIP. To make things more confusing, Cisco may implement SIP within CCM soon. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64459t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: IP Telephony SIP [7:64433]
Do you want to know why SIP is better than H.323 perhaps? CCM stands for Cisco Call Manager where as SIP stands for Session Initiation Protocol; two totally different animals where as one is a call management (aka pbx) platform and the other a suite of protocols used in VoIP communications. Will Gragido CISSP CCNP CIPTSS CCDA MCP 9450 W. Bryn Mawr Ave. Suite 325 Rosemont, Il 60018 www.ins.com [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of supernet Sent: Tuesday, March 04, 2003 10:07 PM To: [EMAIL PROTECTED] Subject: IP Telephony SIP [7:64433] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64527t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: IP Telephony SIP [7:64433]
Do you want to know why SIP is better than H.323 perhaps? CCM stands for Cisco Call Manager where as SIP stands for Session Initiation Protocol; two totally different animals where as one is a call management (aka pbx) platform and the other a suite of protocols used in VoIP communications. Will Gragido CISSP CCNP CIPTSS CCDA MCP 9450 W. Bryn Mawr Ave. Suite 325 Rosemont, Il 60018 www.ins.com [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of supernet Sent: Tuesday, March 04, 2003 10:07 PM To: [EMAIL PROTECTED] Subject: IP Telephony SIP [7:64433] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64526t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IP Telephony SIP [7:64433]
I've never really liked books, except perhaps as introductory material. If you really really want to learn something, always go to the source. In the case of SIP - peruse RFC 3261. David L. Blair wrote in message news:[EMAIL PROTECTED] Browse thought Cisco's CVoice book or VoIP fundamentals both have sections on SIP or goto to Cisco's website and search for SIP. David nrf wrote in message news:[EMAIL PROTECTED] supernet wrote in message news:[EMAIL PROTECTED] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi You shouldn't compare SIP and CCM. SIP is an industry standard, whereas CCM is a Cisco product. Any vendor, including Cisco, can and has implemented SIP. Only Cisco can 'implement' CCM (after all the first 'C' stands for Cisco). There is a significant amount of SIP in production - almost all of it in service-providers. Most of today's 3G wireless networks, for example, rely on SIP. To make things more confusing, Cisco may implement SIP within CCM soon. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64537t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: IP Telephony SIP [7:64433]
Thanks. What SIP servers and SIP phones do service providers use? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of nrf Sent: Tuesday, March 04, 2003 10:03 PM To: [EMAIL PROTECTED] Subject: Re: IP Telephony SIP [7:64433] supernet wrote in message news:[EMAIL PROTECTED] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi You shouldn't compare SIP and CCM. SIP is an industry standard, whereas CCM is a Cisco product. Any vendor, including Cisco, can and has implemented SIP. Only Cisco can 'implement' CCM (after all the first 'C' stands for Cisco). There is a significant amount of SIP in production - almost all of it in service-providers. Most of today's 3G wireless networks, for example, rely on SIP. To make things more confusing, Cisco may implement SIP within CCM soon. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64551t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IP Telephony SIP [7:64433]
SIP servers - Sonus, Clarent (I think), Nortel, Indigo, guys like that. SIP phones used by providers - practically none. Dont' get me wrong - there are SIP phones out there. But phones are not really the point of SIP. SIP is a generalized control plane that extends far and beyond phones. Right now, SIP is mostly being exploited by mobile carriers for back-end interoperability. SIP is also being exploited to facilitate rich instant messaging (consider RFC 3428). supernet wrote in message news:[EMAIL PROTECTED] Thanks. What SIP servers and SIP phones do service providers use? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of nrf Sent: Tuesday, March 04, 2003 10:03 PM To: [EMAIL PROTECTED] Subject: Re: IP Telephony SIP [7:64433] supernet wrote in message news:[EMAIL PROTECTED] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi You shouldn't compare SIP and CCM. SIP is an industry standard, whereas CCM is a Cisco product. Any vendor, including Cisco, can and has implemented SIP. Only Cisco can 'implement' CCM (after all the first 'C' stands for Cisco). There is a significant amount of SIP in production - almost all of it in service-providers. Most of today's 3G wireless networks, for example, rely on SIP. To make things more confusing, Cisco may implement SIP within CCM soon. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64563t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IP Telephony SIP [7:64433]
supernet wrote in message news:[EMAIL PROTECTED] Can anyone kindly enough tell me why SIP is better than CCM? What's the main difference between this two? Is there any SIP in production? Thanks. Yoshi You shouldn't compare SIP and CCM. SIP is an industry standard, whereas CCM is a Cisco product. Any vendor, including Cisco, can and has implemented SIP. Only Cisco can 'implement' CCM (after all the first 'C' stands for Cisco). There is a significant amount of SIP in production - almost all of it in service-providers. Most of today's 3G wireless networks, for example, rely on SIP. To make things more confusing, Cisco may implement SIP within CCM soon. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64440t=64433 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
