Cisco Cisco TelePresence Video Communication Server Expressway
Sending and returning calls via ISDN gateways
FindMe (VCS Express) Deployment Guide
Page 9 of 18
Sending and returning calls via ISDN gateways
This section describes how to use FindMe with calls that are routed via an ISDN gateway (for example, when
calling a mobile phone, or some other ISDN accessible destination).
calling a mobile phone, or some other ISDN accessible destination).
If the VCS has Caller ID (
Applications > FindMe > Configuration
) set to use the FindMe ID, the caller ID
presented will be the user's E.164 phone number.
If the called party returns the call (and the E.164 number is routed by the network to an ISDN gateway on the
video network), the call will be received by the ISDN gateway and forwarded to VCS with the E.164 phone
number as the called number.
video network), the call will be received by the ISDN gateway and forwarded to VCS with the E.164 phone
number as the called number.
VCS therefore needs to be configured to route this call to the relevant FindMe ID in order to call the user's
endpoints. This can be carried out either by using another FindMe entry, or by setting up ENUM.
endpoints. This can be carried out either by using another FindMe entry, or by setting up ENUM.
Using FindMe to convert E.164 numbers to FindMe IDs
This method uses an additional FindMe account to redirect E.164 dialed numbers to URIs.
For each user with both a URI-style or H.323 ID FindMe ID and an associated E.164 phone number, set up a
second user account (
second user account (
Maintenance > Login accounts > User accounts
) with:
n
the Username, for example 123456-name.surname
n
the FindMe ID set to the user's E.164 phone number
n
the Principal device address set to the FindMe ID of their main account
This is a static mapping, so the user will not ever need to log in to this second (E.164) account. Any changes
to devices associated with that user are always made in their main account.
to devices associated with that user are always made in their main account.
Using ENUM to convert E.164 numbers to FindMe IDs
Using ENUM allows incoming E.164 numbers to be looked up in an ENUM server and the call forwarded to
the URI associated with that number.
the URI associated with that number.
To use ENUM:
n
for each account, set up the phone number as the ENUM address in the DNS server and map it to the
FindMe ID for that account
FindMe ID for that account
Configuration and implementation details for ENUM are available in ENUM dialing on VCS Deployment
Guide.
Guide.
Including the ISDN gateway prefix in the caller ID
It is easier to return a PSTN / ISDN call that has been received through an ISDN gateway if the VCS is
configured to include the prefix of the ISDN gateway in the caller ID.
configured to include the prefix of the ISDN gateway in the caller ID.
To configure the Gateway caller ID on the VCS: