General practice clinical
system changes and impacts
on DTS/MESH addressing
Data Transfer Service guidance
February 2016
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General practice clinical system changes and impacts on DTS/MESH addressing
Contents
Introduction
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TPP SystmOne
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Old solution DTS/MESH client
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Appendix
5
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General practice clinical system changes and impacts on DTS/MESH addressing
Introduction
When a clinical system change is made in General Practice the planning process should
include the potential impacts on messaging flows from the organisations (Trading Partners)
with which that practice communicates. Failure to do so could result in messages not being
received by the practice and therefore represents a clinical risk.
Where a change involves system suppliers other than TPP, there is no change to the
addressing details that Trading Partners should use for the practice.
For example, a change to the practice system from a solution provided by In Practice
Systems (InPS) to a solution provided by EMIS, or vice versa, requires no change to the
DTS/MESH mailbox address. The change is therefore transparent to the Trading Partners
and they are not required to make any addressing change within their systems.
From a DTS/MESH perspective, the ownership of the DTS/MESH Mailbox for the practice is
simply transferred to the new supplier. This is actioned by the National Service Desk at the
request of the incoming supplier via a support call.
Where the change to the GP practice system does involve a change to/from TPP SystmOne
then there is an impact on the DTS/MESH addressing. The reason why a change to the
addressing details is required is because of the specific configuration of TPP SystmOne and
its use of DTS/MESH mailboxes.
TPP SystmOne
TPP SystmOne utilises shared mailboxes to support all of its customers. There is not a
one-to-one relationship between a GP practice and the DTS/MESH mailbox that supports
messaging for the practice (this model is the one in place for all other suppliers with the
exception of TPP).
In the TPP model, a single DTS/MESH mailbox supports many GP practices. The appendix
provides guidance on which specific DTS/MESH mailbox should be used for which GP
practice.
As TPP SystmOne uses shared DTS/MESH mailboxes, the Trading Partners need to be
informed of the change to the DTS/MESH address that should be used for the specific
practice.
The Trading Partner should also be informed as to when this change becomes effective, i.e.
the go-live for the new system. Where the change involves the installation of a TPP
SystmOne solution, it is very important that the old system is decommissioned.
The plan should therefore include a request to the supplier of the old system to at the
very least decommission the DTS Client on their solution. If the old solution is not
decommissioned, the Trading Partner may continue to send messages to the practice at the
old address and there is a significant clinical risk that the practice never actually read these
messages.
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General practice clinical system changes and impacts on DTS/MESH addressing
Old solution DTS/MESH client
Once the old solution DTS/MESH client is decommissioned, any Trading Partner attempting
to send messages to the DTS/MESH mailbox will receive Non-Collected Reports and so will
know that there is an issue with the DTS/MESH mailbox which they should investigate.
Non-Collected Reports are only generated by the MESH Central Service for messages
that have not been collected from DTS/MESH within five days. Trading Partners may
therefore not be aware for this period that the practice has not collected the messages that
they have sent.
If the HSCIC DTS/MESH Team has been informed that the old mailbox should no longer be
used for the GP practice, they can de-activate the mailbox on the MESH Online Enquiry
Service (MOLES). If a Trading Partner attempts to send to a DTS/MESH mailbox that has
been de-activated, they will receive an immediate "Send Failed" error.
The management of Trading Partner addressing is equally important where the change
might be away from a TPP SystmOne solution, i.e. TPP to EMIS or In Practice Solution.
In these cases it is not possible to decommission the DTS/MESH client or deactivate the
DTS/MESH mailbox, as it will be shared by other TPP SystmOne Practices. The
management of the Trading Partners requires very thorough management as Non-Collected
Reports or "send failed" errors will not be generated.
For further advice/assistance please raise a call with the National Service Desk using the
weblog (account required), or call 0300 30 35 035.
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General practice clinical system changes and impacts on DTS/MESH addressing
Appendix
TPP have been provided with a number of DTS/MESH mailboxes to support the transfer of
messages with SystmOne. The distribution of message transfers with SystmOne across a
number of DTS/MESH mailboxes will provide benefits to all parties.
Collection and transfer times should improve particularly later in the day, which should mean
that any acknowledgement messages should be returned to message originators in a timely
manner.
It will also be significantly easier to investigate support issues should they arise and there will
no longer be a single point of failure.
DTS/MESH mailboxes are allocated based on the message type and the first letter of the
ODS Code (organisation code) of the GP practice.
For pathology/radiology messages the DTS/MESH mailboxes are allocated as
follows:
ODS code starting with DTS/MESH mailbox address
A
ygm27pm
B
ygm27pm1
C
ygm27pm2
D
ygm27pm3
E
ygm27pm4
F
ygm27pm5
G
ygm27pm6
H
ygm27pm7
J
ygm27pm8
K
ygm27pm9
L
ygm27pm10
M
ygm27pm11
N
ygm27pm12
P
ygm27pm13
W
ygm27pm14
Y
ygm27pm15
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General practice clinical system changes and impacts on DTS/MESH addressing
For example, if your pathology/radiology lab sends to a GP practice (SystmOne unit) with an
ODS code starting with 'C', then the recipient DTS address should be changed to
'ygm27pm2'.
For out of hours messages the DTS/MESH mailboxes are allocated as follows;
ODS code starting with DTS/MESH mailbox address
A to E
ygm27hc5
F to J
ygm27hc6
K to O
ygm27hc7
P to T
ygm27hc8
U to Z
ygm27hc9
For example, if your OOH service sends a message to a GP practice (SystmOne unit) with
an ODS code starting with 'C', the recipient DTS/MESH address should be changed to
'ygm27hc5' as it would fall within the range A through E.
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