The CM uses the MAC as a unique identifier in it's SQL database. It's actually a distorted version of the MAC, such as a phone's identifier - SEP003094C26105 --
RFC 1149 Compliant. ""Priscilla Oppenheimer"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Great answer. Finally an explanation that makes sense for the marketing > babble about IP Telephony making Moves, Adds, and Changes easier. ;-) > > One quesiton though, does CallManager really care about MAC addresses? > Unless the receiving phone is on the same network segment as the calling > phone, the MAC address won't help matters. ARP would take care of getting > the MAC when it's needed. > > Priscilla > > > Bruce Enders wrote: > > > > B. J. > > The only trick here is to remember that the User phone number > > "1111" is > > "mapped" to the MAC address and IP address of the ethernet > > interface > > associated with the hard phone, or the laptop in the case of > > Softphone. > > (Both are PCs running specific applications software). Whenever > > either is > > disconnected from the network long enough for link to drop, > > they have to > > check in with DHCP when they are re-connected to the network. > > Both also > > have to check in with their CallManager. During that process, > > they > > identify themselves using their MAC address, and announce their > > current > > IP address. After that, the CM can simply forward based on the > > IP > > address. This capability is one of the primary reasons that > > Moves, Adds, > > and Changes in an IP Telephony system are far more simple than > > in a > > legacy PBX environment. (The logic behind your response sounds > > like it > > comes from the legacy telephone world, which is very used to > > working in a > > very static addressing environment). > > Bruce > > > > B.J. Wilson wrote: > > > > Hi Vance - > > > > I too am studying All Things VoIP, and I'm curious how > > this would work. > > Say you have User A trying to call User B. User B is > > currently in the > > office. So User A dials '1111' which is User B's phone > > number (or "route > > pattern" if you want to be specific). CallManager picks up > > the route > > pattern, looks up User B's location, and forwards the call > > on. All is good. > > Now, say User B is telecommuting. How does CallManager > > know this? How > > does your RAS (remote access) server notify CM that User B's > > geographical > > location has moved? Is there something in User B's RAS > > (Registration, > > Admission and Status) setup that alerts CM to the fact that > > they're dialing > > in from home? > > > > Thanks, > > > > BJ > > > > ----- Original Message ----- > > From: "Vance Krier" > > To: > > Sent: Wednesday, October 16, 2002 4:08 AM > > Subject: Re: VoIP Clarification. [7:55682] > > > > Hey Stu, > > > > In simple terms, yes you are correct. However, as I'm sure > > you know, you > > need to take this type of setup with a grain of salt. If > > you have a > > > > decent > > > > bandwidth, low latency, consistent connection between the > > phone and CM, it > > works fine. There's absolutely no guarantees for QoS on > > the Internet. > > Now, FWIW, I use softphone on my laptop when I travel and > > I've gotten > > satisfactory results (IMO) better than 75% of the time. > > > > I always pitch this as being a *kewl* feature, but never as > > a selling > > > > point. > > > > I'm > > very, very cautious with customers over this. As long as > > the user > > using it is understanding and realizes there will be times > > when it doesn't > > work or the quality is really crappy, then typically they > > stay happy. Not > > something I'd give to Internet/computer/technology > > illiterate executive. > > > > I love it, by the way. > > > > Good luck, > > Vance > > > > ""Stuart Pittwood"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED] ... > > > > Good Morning all, > > > > I am just starting to look into VoIP as I have been asked > > by my manager > > > > to > > > > do some research and find out if there are any benifits > > from VoIP for > > > > our > > > > firm. > > > > Am I right in saying that if we had a solution based on > > Cat 6000 (or > > similar) switches, with a cisco VPN solution for the home > > workers, that > > users who use their laptop at home with cisco softphone > > or hardware > > > > phone > > > > could have their telephone extenstion follow them? > > > > Please forgive the simplicity of my question, just making > > sure I am > > > > thinking > > > > along the right lines. > > > > Thanks > > > > Stu > > -- > > > > Bruce Enders Email: > > [EMAIL PROTECTED] Chesapeake NetCraftsmen > > o:(410)-280-6927, c:(443)-994-0678 > > 1290 Bay Dale Drive, Suite 312 WWW: > > http://www.netcraftsmen.net Arnold, MD 21012-2325 > > Cisco CCSI# 96047 > > Efax 443-331-0651 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55753&t=55682 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
