[EMAIL PROTECTED] wrote: > Hey gang, > I'm looking at escaping from a Nortel Meridian CISC system > to Asterisk/Digium/SIP phones. I'm currently in the testing > and proof of concept phase. I'm going to need a SIP phone > and don't want to re-purchase and have "orphans" around.
I've got a few different IP phones in my lab (including a C7960), I'm currently loving my Polycom 300 - a solid phone for the price, and everyone says the 500 and 600 are even better. I think I'll be going with Polycom for my customers until the next best thing comes along. I looked at the Snom phones when I was at Astricon, and while they may be technically great, the problem I had with them is that they are not weighted properly. If you've ever yanked your phone off the desk you'll understand the need for a proper ballast. The handsets feel cheap too, because they're too lightweight. Still, from everything I've read you'll certainly want to try one out. Also, the Snom 220 seems to be the best bet as a reception phone, especially if you want a busy lamp field on your swithboard. The Cisco phones are great, but it's hard to stomach paying an extra $100-$300 for that little drawing of the Golden Gate Bridge they put on all their products. One of the exciting things about standards-based telephony is that you can mix and match your phones. It's the same as analog sets; the agony is in the sheer number of choices available. > We currently run Nortel 7310 phones and they work great. > I'm sort of overwhelmed by all of the different IP phones. I > was hoping some folks would share what they have found. My > primary goal is to replicate the 7310's features and to allow > room for growth in the future with telephony applications. One of the big differences between the Norstar and the Asterisk is that the Norstar is a key system, the Asterisk is a PBX. If you completely replace the Norstar your users will will no longer have access to line status on their phones; that is all handled behind the scenes. Also, you will not get busy lamp field, which means you won't be able to monitor who is on the phone (there are ways of doing this in Asterisk, but it's not as intuitive to implement). Finally, the Norstar has hundreds of easy to use features; each one you'll want to keep will need to be carefully hand-crafted in the dial plan. > Our primary driver is configurability and features that we > can get in Asterisk, that we can get without a lot of money > from Nortel. Nortel sure has fallen behind. Even the VoIP stuff they have does not work well, and is barely standards-compliant (if at all). > Namely- > Voicemail, telecommuting workers on the pbx, better call > handling, better automation. I'd like to be able to integrate > smart features like directory and call handling to the > handset, but I'll freely admit I'm just starting out. My > initial goal is to just to get onto Asterisk and get it > working. I'll worry about cool stuff later. I think you'll be wise to leave the Nortel KSU in place for a bit. That way you can introduce new features to the users without them also having to learn new phones. There are challenges either way. > Our integration and migration plan is as follows: If anyone > has some suggestions or pointers I'd love to hear them. > > 1. Test and evaluate Asterisk with TDM400 with 1 FXO/FSO port > each. 2. Configure Asterisk to be the primary PBX and slave > the Nortel Meridian system to it using a second TDM400. This > avoids immediate replacement of all handsets. Will allow > immediate access to features such as Voicemail. 3. Overtime, > upgrade desk phones to IP phones. When all phones are > replaced, decommission Nortel and sell on Ebay. :) Are you using calling line ID? The problem here is that you have two systems that will each need to wait two rings before answering. The Asterisk will need two rings to get the caller ID, and then it'll take two more to pass the same CLID on to the Norstar. [PSTN]==(2 rings for CLID)==[Asterisk]==(2 rings for CLID)==[Nor*] Make sure you put an autoattendant in the middle, to ensure your callers don't have to wait too many rings before some indication that there's a system at the other end. Also, there is some danger of echo if you put the Asterisk in the middle. You'll want to be patient with this, as it may take a bit of tweaking to sort out. IMPORTANT: Make sure your Asterisk and Nortel are grounded to the same point. Best way to achieve this easily will be to plug them into the same electrical outlet. You do NOT want voltage potentials on the analog loop between the * and Nor*, believe me. The fact is, analog is a technology that really doesn't lend itself well to integration. It can be made to work, but callers and users will have to deal with a lot of extra rings. Also, transfers and the like will involve hookswitch flashes and such. I'm not saying avoid it, just be aware of the need to manage user expectations. One possible way to handle this would be to configure the system so that the Norstar sees the Asterisk as a sort of Centrex service. This would require dedicating an analog line for any set you wished to integrate. [Asterisk] [Norstar] FXS(ZAP/1)---L001(R&A)-x21 FXS(ZAP/2)---L002(R&A)-x22 FXS(ZAP/3)---L003(R&A)-x23 FXS(ZAP/4)---L004(R&A)-x24 FXS(ZAP/5)---L005(R&A)-x25 FXS(ZAP/6)---L006(R&A)-x26 FXS(ZAP/7)---L007(R&A)-x27 FXS(ZAP/8)---L008(R&A)-x28 The Norstar offers a lot of Centrex integration features, so your voicemail/message waiting and such would work well. Also, the Asterisk would then easily be able to handle the different users on the Norstar, as it would have a dedicated line for each of them. The only problem there would be the cost of the integration hardware, and the fact that your CICS can only grow to a maximum of 8 analog lines. Another possibliity would be to use BRI to integrate the two. This, however, will require a BRI card in the CICS (as well as a services cartridge), as well as BRI hardware for the Asterisk. Not to mention that BRI is a pain in the butt to configure. Still, one you've got it working you'd have full ISDN integration between the boxes, which'd be technically superior to analog. It really depends on what sort of a science project you want this to become. > Cold turkey option is to spend the extra $ and buy the > handsets upfront and just ditch nortel without a transition period. It'll be easier technically, but for the users this might be a bit more painful. > We currently have 4 pbx lines and 1 dedicated fax/credit card line. > We have 10 handsets. Well, your Asterisk will certainly put you in an excellent position to grow. Cheers, Jim. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 28/12/2004 _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
