One phone with multiple extensions PROBLEM

[bberak (Brano Berak)]

Hello
I have a new instalation of FreePBX ver 14.0.3.6, (Firmware: 12.7.5-1807-1.sng7).
It is VM on Hyper-v server 2016,
This PBX about 100extensions.
I have a big problem with Cordless Dect Phones GIGASET A510, C610,
If I have more extensions on base station I get status LAGGED (2000-3000ms).
Extensions are random unavailable.
If I use one extension per phone everything work well.

Can you help me someone…

MY extension conf :
[215]
deny=0.0.0.0/0.0.0.0
dtmfmode=rfc2833
canreinvite=no
host=dynamic
trustrpid=yes
sendrpid=pai
type=friend
nat=no
port=5060
qualify=yes
qualifyfreq=60
transport=udp
avpf=no
force_avp=no
session-timers=accept
icesupport=
encryption=no
namedcallgroup=
namedpickupgroup=
vmexten=
permit=0.0.0.0/0.0.0.0
defaultuser=
rtcp_mux=
dial=SIP/215
secret=trusr645ueytriry
context=from-internal
mailbox=215@device
callerid=215 Hudec Mato <215>
callcounter=yes
faxdetect=no
cc_monitor_policy=generic

[Fraser]

dial=SIP/215

SIP only supports single registration. You should use PJSIP for multiple endpoints to a single extension number.

[bberak (Brano Berak)]

It’s OK but I have a 5 extensions (215,216,217,218,219) on same phone.

[jpennell (Jonnie)]

This is a little confusing… do you mean you have multiple devices on the same extension (needs PJSIP) or multiple extensions on the same device (doesn’t need PJSIP). When you say you’re using Gigaset handsets A510, C610 etc - what are you using as the base? Gigaset N510, N720 etc?

[bberak (Brano Berak)]

I use only SIP PJSIP is disabled
YES I use multiple extensions on the same device for example C530-IP.
But my problem is now solved.
Gigaset release new FW last month and this fix my latency problem.