$Id: tmemo-jiri-phone-shopping.txt,v 1.2 2003/04/14 03:05:15 jiri Exp $jiri's SIP phone shopping list------------------------------This is Jiri's list of wishes for SIP "hardphones". When there is sucha phone, I will be glad to test it, promote it, and praise the vendor.I) MUSTsWithout MUSTs, I will not like the phone.- Price - get it bellow $100 (I mean for one phone, not for 10.000 of them)- NAT-Traversal support: STUN, symmetric communication- DNS fail-over, as required by specification (I'm aware of only one phones  which is getting it right today, 2003-02)- REFER (correctly please)- reasonable provisioning- the phones must be able to detect loss of Ethernet connectivity,  display it, and re-REGISTER when reconnectedII) RECOMMENDEDWith RECOMMENDED, I will do like the phone.- multiple lines - multiple calls- DTMFIII) SHOULDWith SHOULDs, I will fall in love with it.- GIPS codec is good- power-Ethernet- desktop features: deny incoming call, DnD, 3-rd party conferencing,  auto-repeat of failed call attempts- well-readable display, at best backlit- solid robust design, like with the PBX phones from well-established  PBX vendors Note there are other lists too -- Henry Sinnreich's draft provides a greatdictate to phone vendors.http://www.iptel.org/ietf/configuration/#draft-sinnreich-sipdev-reqKNOWN ERRORs------------These are errors we observed frequently to fail in phones: digest/qop, DNS fail-over, REFER, transaction matching, record-routing.