Yealink T54S

Troubleshooting
551
the URL is sent to the server.
Note: It works only if “account.X.sip_server_type” is set to 12 (Star2Star) and
“account.X.acd.unavailable_reason_enable” is set to 1 (Enabled).
Permitted
Values
String
Default
Blank
Parameter
account.X.acd.available_url
[1]
<MAC>.cfg
Description
It configures the URL the phone sends when the ACD agent changes the status to
available (you press the Avail soft key on the phone).
Note: It works only if “account.X.sip_server_type” is set to 12 (Star2Star).
Permitted
Values
String
Default
Blank
[1]
X is the account ID. For T54S/T48S/T48G/T46S/T46G/T29G, X=1-16; for T52S/T42G/T42S, X=1-12; for
T41P/T41S/T27P/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21(P) E2, X=1-2; for T19(P) E2, X=1.
Ethernet Interface MTU Parameter
Parameter
static.network.mtu_value
[1]
<y0000000000xx>.cfg
Description
It configures the MTU (Maximum Transmission Unit) of network interface card.
Permitted
Values
Integer from 128 to 1500
Default
1500
[1]
If you change this parameter, the IP phone will reboot to make the change take effect.
SIP Settings Parameters
Parameter
account.X.compact_header_enable
[1]
<MAC>.cfg
Description
It enables or disables the IP phone to support compact SIP header.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
account.X.custom_ua
[1]
<MAC>.cfg
Description
It configures the suffix of User-Agent in SIP request messages from the IP phone.
The following takes the T27G IP phone running firmware version 69.83.0.10 as an