I have a set of analogue phones connected to asterisk using an SP2102, which is working very well, but one problem I have is that I have no way of putting a call onto hold to transfer to another phone.
My phones have the usual 0-9, #, * and an R key.
I’m looking for a way to use either the R, # or * key to place a call on hold. Neither of these buttons do as I wish at the moment.
As many automated phone services (e.g. telephone bill payments) require the use of DTMF # and * tones, the R key seemed like the best option, however I read that signalling may be a problem here.
Can anyone offer any advise on how I can make this work, e.g. by pressing * and # in quick succession?