mark morreny wrote: > Hi > > I am working on deploying voip for my company and would like to seek > some advice on the number of E1 lines we need to rent. Our telco told > us that there can be at most 30 concurrent channels on an E1 line. > Typically, what is the maximum number of DIDs that we can allocate to > that E1 line before users get frequent "all lines are busy"? We are > running a support center with mostly incoming calls. Is there any rule > of thumb that are typically used for this kind of estimation?
That depends on the application. In general, phone lines for voice (not fax or modem) are considered to have a 30:1 oversubscription ratio, but that can vary immensely. Also, it is instructive to inquire what portion of the DIDs will be used with what frequency, and whether the distribution is truly uniform. VoIP is a DID-intensive industry; often, DIDs are assigned to every employee in an organisation so that everyone has one in principle, even if relatively few people actually use them. -- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 Mobile : (+1) (706) 338-8599 _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
