[Asterisk-Users] E1 -> T1 native bridging for fax, will it work?

[Kevin P. Fleming]

Remco Barende wrote:

> - even if * will do the software conversion will the quality of the 
> channel remain sufficient to provide rock solid faxing. Maybe the 
> channel bank is considerably better than the sipura's I have been using 
> so far and there would be no ethernet involved.

There will be far less latency and no jitter to speak of doing the 
ulaw/alaw conversion, unlike going over the LAN.

> - are there any T1 channel banks that support alaw or would I be forced 
> to either buy an E1 channel bank or use a legacy PBX as channel bank

I doubt you will find a T1 channel bank that supports alaw companding.

> - who decides which encoding is used, zaptel or the channelbank (in 
> other words, if a T1 channel bank would support alaw, can I force alaw 
> only to guarantee native bridging?

The other device decides; Asterisk/Zaptel can be configured for either 
companding method on any channel.