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Beginner

WS-C2960-48PST-L & Cisco 8851 Issue

So I'm having issues with a Cisco IP Phone 8851 that's connected to a WS-C2960-48PST-L. It powers up and registers. However, it's unable to make or receive calls. Is there a compatibility issue with this model phone and switch? I also have 2960X switches in my environment that work fine with 8851s.

 

 

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 52 WS-C2960-48PST-L 15.0(2)SE C2960-LANBASEK9-M

 

switch#show run int f0/13
Building configuration...

Current configuration : 156 bytes
!
interface FastEthernet0/13
switchport voice vlan 3
logging event link-status
mls qos trust dscp
no snmp trap link-status
spanning-tree portfast
end

 

switch#show mac add | i 893e
1 0027.902a.893e DYNAMIC Fa0/13
3 0027.902a.893e DYNAMIC Fa0/13

 

switch#show power inline
Available:370.0(w) Used:167.1(w) Remaining:202.9(w)

Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/13 auto on 9.4 IP Phone 8851 4 15.4

Everyone's tags (2)
6 REPLIES 6
Hall of Fame Community Legend

Re: WS-C2960-48PST-L & Cisco 8851 Issue

Switch is running an early version of 15.0(2)SE train. I strongly recommend upgrading to the latest version of the 15.0(2)SE train and see if makes any difference.
Rising star

Re: WS-C2960-48PST-L & Cisco 8851 Issue

if the phone registers to the call manager, I suggest to check there why the phone cannot initiate or receive calls.

it may have a CSS where only calls to local numbers or maybe even only to the operator are alowed!

as this is a SIP phone you may need additional configuration to call SCCP phones ?

or this:  The Cisco IP Phone 8851 requires an Enhanced User Connect License (UCL) in order to connect to Cisco Unified Communications Manager.

Beginner

Re: WS-C2960-48PST-L & Cisco 8851 Issue

This is not the case.

Hall of Fame Community Legend

Re: WS-C2960-48PST-L & Cisco 8851 Issue

So how many phones are having this issue?
What CUCM version are you running?
Beginner

Re: WS-C2960-48PST-L & Cisco 8851 Issue

CUCM Version - 11.5.1.13900-52

There are a few 8851s that are affected by this issue. It's just at this one site. They register just fine, but cannot call out or receive calls.

Beginner

Re: WS-C2960-48PST-L & Cisco 8851 Issue

I've updated the switch to the latest and greatest code. No luck.

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