I need clarification as to DID in T1 connection. T1 provides 24 channels for voice/data. Do it assign each channel to particular DID. Or you can have unlimited DID to share the 24 channel as an example. ie. Outgoing/incoming traffic is not bound to particular channel. Whatever is available will be used according to the grouping in zapata.conf. -- David Kwok, CISSP Tel: 612 82315701 ext 1002 Iaxtel/FWD # 17001813482 ext 1002 CISSP, Certified Information System Security Professional -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 1878 bytes Desc: S/MIME Cryptographic Signature Url : http://lists.digium.com/pipermail/asterisk-users/attachments/20040612/16bfd690/smime.bin
dkwok wrote:> I need clarification as to DID in T1 connection. > > T1 provides 24 channels for voice/data. Do it assign each channel to > particular DID. Or you can have unlimited DID to share the 24 channel > as an example. ie. Outgoing/incoming traffic is not bound to > particular channel. Whatever is available will be used according to > the grouping in zapata.conf.If you get 24 voice channels on your T1, you must be using robbed bit signalling, rather than ISDN. There are a number of robbed bit variants, going by a number of different names. However, they all share the ability to handle DID. Some send the dialed number as DTMF. Some send it as Bell MF tones. They can also send caller ID, by dialing a string of digits with * characters to delimit what is the caller number and what is the dialed number. Details of which robbed bit variant you are using is left as an exercise for the reader. :-) Regards, Steve
So DIDs are sharing available channels. In particular for ISDNs are DIDs sharing available channels? -- David Kwok CISSP,(ISC)2 61282315751 ext 1002 FWD#/IAXTEL# : 17001813482 ext 1002
> > I need clarification as to DID in T1 connection. > > T1 provides 24 channels for voice/data. Do it assign each channel to > particular DID. Or you can have unlimited DID to share the 24 > channel as > an example. ie. Outgoing/incoming traffic is not bound to particular > channel. Whatever is available will be used according to the > grouping in > zapata.conf. > > --DID's are assigned to your "circuit" at your provider, so when a DID is dialed, the first available voice channel on your circuit (whether T-1 or otherwise) will be used. The DID then can be used in your dial plan to determine where to send the call.