Frank Sautter
2005-Jul-07 02:27 UTC
[Asterisk-Users] experience with analog channel banks in E1 land
hi, we are currently planning are large site which will migrate from an old siemens hicom pbx to asterisk. it will be a slow migration, the asterisk server will be inserted between the telco E1 and the hicom. new phones will be sip ones. the customer has several fax machines and analog phones (some of them have to be explosion-proof). around 50 analog ports in total are needed. as we are in E1 land (germany) we have 64kpbs per channel. most (affordable) channels banks are T1 (56kpbs per channel i assume). the questions are: - could the T1 channelbanks be connected to a TE405P with two channels in E1 mode (telco and hicom pbx) and two channels to the channel banks (i think yes, but just to be shure)? - will the faxmachines work (56kpbs-64kbps)? is asterisk translating this (btw. how do faxes work from europe to north america - the telcos have the same problem)? - which signalling protocoll will be used on the T1 side? is asterisk translating this correctly? - btw. where is the different bitrate coming from? is it 7bit T1 and 8bit E1 or 7kHz and 8kHz sample rate? regards frank sautter
Christian Victor
2005-Jul-07 03:01 UTC
[Asterisk-Users] experience with analog channel banks in E1 land
Hi!> - could the T1 channelbanks be connected to a TE405P with two channels > in E1 mode (telco and hicom pbx) and two channels to the channel banks > (i think yes, but just to be shure)?Yes - no problem.> - will the faxmachines work (56kpbs-64kbps)? is asterisk translating > this (btw. how do faxes work from europe to north america - the telcos > have the same problem)?Usually the fax is analog 14,4k connection. The channelbank does the digitizing to ulaw and the other end coverts it back to analogue. Afaik no matter if its european or american ISDN. No problems experienced by now.> - which signalling protocoll will be used on the T1 side? is asterisk > translating this correctly?That depends on your channel bank. Rhino channel banks for example are specially designed for asterisk. But most T1 channel banks should do.> - btw. where is the different bitrate coming from? is it 7bit T1 and > 8bit E1 or 7kHz and 8kHz sample rate?Don't kow that ;-) Christian
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