Troubleshooting guide
Troubleshooting Guide
60
5235 IP 
Phone
People, Messages, History, 
Settings, and Application 
shutters on the 5235 IP 
Phones do not function.
If you change the IP 
address of the RTC on the 
3300 ICP (System IP 
address on MXe Server), 
the 5235 IP Phone 
applications will not 
function.
To restore these applications:
1. Program a local entry in the 
ICP/PBX Networking form that 
matches the new IP address of 
the RTC (or System IP address 
on MXe Server)
or
If you already have an entry in 
the ICP/PBX assignment (hot 
desk or clustered systems), 
change the local entry to match 
the new RTC IP address or 
System IP address.
2. After you program the local 
entry, reboot the 3300 ICP and 
the 5235 IP Phones will recover 
all the applications.
5702 IP 
Phone or 
SpectraLink 
Wireless 
Handset
User experiences audio 
interruption on either of 
these sets.
User is in a conversation on 
either of these phones and a 
programmed key becomes 
active (for example, ringing 
or receiving calls) and the 
user experiences a 
momentary interruption in 
audio reception. 
The 5207 IP Phone has 14 
programmable keys; the 
SpectraLink wireless set 
has 13 line select keys. If 
you program Direct Station 
Select (DSS) or multiline 
key appearances with 
audible “ring” type into any 
of the programmable keys 
on these phones, users 
may experience audio 
interruption during 
calls.This interruption 
occurs because the 
hardware in these phones 
does not support two 
speech channels.
Do not program DSS or multiline 
key appearances with “audible” 
ring type on 5207 IP Phones or 
SpectraLink wireless sets. If you 
need DSS or multiline key 
appearances on a phone, you 
should program the key 
appearances on the 5207 IP 
Phone or SpectraLink wireless set 
with “no ring” type, or use an IP 
Console (Release 5.2 version or 
later), a 5215 IP Phone, or a 5220 
IP Phone instead of the 5207 IP 
Phone or SpectraLink wireless set.
Table 16: Specific Model Troubleshooting
Phone Symptom Probable Cause Corrective Action
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