Polycom MGC Administrator Administrator's Manual page 135

afterwards when assigning the Network Service to the IP card (for details
see "Assigning Network Services to the IP/IP+ Cards" on page 3-93).
To delete an existing span, select it and click the minus (-) button.
Adding a Span
a. To add a span click the plus [+] button.
The IP SPAN dialog box opens.
This dialog box is used to define the IP card to which the IP network
is connected and that should be used with this Network Service.
The IP+ cards and IP48, hardware version 4.41 and higher, can be used for both
SIP and H.323 conferencing. The IP cards (IP12/24) can only be used for H.323
conferencing.
MGC Administrator's Guide
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