This document describes how to resolve the error No Park
Numbers Available while trying to park calls at one of the
sites in a Cisco Unified Communications Manager 7.0 cluster.
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The information in this document is based on these software and
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
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The Call Park feature allows you to place a call on hold so it can be
retrieved from another phone in the Cisco Unified Communications Manager system
(for example, a phone in another office or in a conference room). If you are on
an active call at your phone, you can park the call to a call park extension by
pressing the Park softkey or the Call Park button. Someone on another phone in
your system can then dial the Call Park extension to retrieve the call.
You can define either a single directory number or a range of directory
numbers for use as Call Park extension numbers. You can park only one call at
each Call Park extension number.
When you configure Call Park, consider this information documented in
Cisco Bug Id
(registered customers only)
Call Park numbers cannot overlap between Cisco Unified CM servers.
Make sure each Cisco Unified CM server has its own unique number
Call Park numbers may have an associated partition that restricts
access to the Call Park numbers and prevents retrieval of parked calls. If
partitions are used to restrict access to Call Park numbers, a unique Call Park
number or range of Call Park extension numbers must be defined for each
partition on each Cisco Unified CM in the cluster.
When the end user invokes Call Park, Cisco Unified CM attempts to
find an available Call Park number from a Call Park partition that is currently
accessible via the calling search space for the party that invoked Call
These restrictions apply to Call Park:
Cisco Unified Communications Manager can park only one call at each
Call Park extension number.
Make sure each Call Park directory number, partition, and range is
unique within the Cisco Unified Communications Manager
Each Cisco Unified Communications Manager to which devices are
registered needs its own unique Call Park directory number and
When you try to press the park key, it says No Park
For this error, perform these steps in order to check the configuration
Ensure that Park Number is configured for the Cisco Unified
Communications Manager Node where the phone is Registered.
Check that the configuration Phone CSS has a partition for the Call
Calls made between internal IP phones were able to be parked, but calls
made from a PSTN number were not parked. Even though the phone was registered
to Cisco Unified Communications Manager and the Call Park range was also on the
same node, Call Park was failing though requirements were matched.
Note: The issue is with parking calls only to one site.
Make a test call from a PSTN number and try to park the call. Now,
take traces of the call and grab a trace on the selected time range when the
call is parked with the help of RTMT. Refer to
Trace and Log Central in RTMT for more details.
The trace log file shows that the H.323 gateway is registered to a
different CUCM than the one on which you are trying to park the call. This
causes the session target ipv4 command in the
dial-peer configured on the gateway to point to a different CUCM node. Hence,
the call control and call parking occurs in different CUCM nodes. As a result,
when you tried to park the call, you received the No park number
Perform these steps in order to set a new Call Park range on the CUCM
node to which the H.323 gateway is registered:
Create a new partition with the name
Add the partition internal to the Calling Search
Space that the phone and H.323 gateway are using.
From the Cisco United CM Administration page,
navigate to Call Routing > Call
Click the Add New button on the window displayed
A new window opens:
Enter the Call Park Number/Range. This is the new
number used to pick up the parked call coming from the PSTN.
Choose the newly created Partition. In this example,
it is internal.
Choose the Cisco Unified Communications Manager to
which the H.323 gateway is registered.
You are now able to park the calls coming from the PSTN via the H.323