Inalp Networks SmartWare Release 2.10, Software Configuration Manual

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Gateway Configuration 291
Software Configuration Guide Release 2.10, Revision 1.00
important function for gatekeepers is providing admission control, specifying what devices can call
what numbers.
Command Purpose
Step 1 node (gw-h323)[h323]# [no] isoip-sp-mapping
<e164> <portaddress> [g711alaw64k
g711ulaw64k g723_6k3 g729 transparent ]
Outgoing calls (to H.323): mapping table
'calling-party-number' to codec;
Incoming calls (from H.323): mapping
table 'called-party-number' to codec;
A. Outgoing calls (to H.323):
For outgoing calls the calling party number is matched against the entries in the table defined with
the command isoip-sp-mapping. In case of a full match the SmartNode selects the specified codec. In
addition the portaddress is used as link into the session router where additional settings can be
configured. In case of a mismatch (the actual calling party number is not present in the mapping
table) the SmartNode selects the first entry of the table and sets the H.323 calling party number to
this value and selects the according codec.
A. Incoming calls (from H.323):
For incoming calls the mapping table's entries are interpreted as called party numbers (destination
numbers). The table is entered before the session router is activated and the called party number is
matched against the entries in the mapping table. In case of a match the specified codec is selected. In
addition the specified port number is used as entry point into the session router.
Example: Configuring A-side and B-side codec selection
The following example shows how to enable Q.931 tunneling and tunneling option isoip-2 on the
H.323 gateway.
SN(cfg)#context cs switch
context cs switch
...
interface pstn isdn0
routing dest-interface surpass_0
...
interface h323 surpass_0
routing dest-interface isdn0
portaddress 10
...
gateway h323
...
codec g723_6k3 30 30
codec g711alaw64k 20 20
codec g711ulaw64k 20 20
...
q931-tunneling isoip-sp
isoip-sp-mapping 08972231411 10 g711alaw64k
isoip-sp-mapping 08972231412 10 g723_6k3
isoip-sp-mapping 08972231413 11
30.4 Configure Registration Authentication Service (RAS)
in an H.323 Gateway
As mentioned in previous chapters a call setup can use direct call signaling and gatekeeper routed call
signaling . Direct call signaling is already described in Chapter 25 , “ CS Interface Configuration ”. For
gatekeeper routed call signaling the H.323 network needs a gatekeeper device. Gatekeepers manage
H.323 zones, which are logical collections of devices such as all H.323 devices within an IP subnet.
Gatekeepers for example provide address translation (routing) for the devices in their zone. This
could be, for instance, the translation between internal and external numbering systems. Another