User's Manual 1156 Document #: LTRT-27045
Mediant 1000B Gateway & E-SBC
Parameter Description
supported SUBSCRIBE sessions. When set to -1, the device
uses the default value. For more information, contact your
AudioCodes sales representative.
Note:
 For the parameter to take effect, a device reset is required.
 The maximum number of SUBSCRIBE sessions can be
increased by reducing the maximum number of SBC
channels in the License Key. For every reduced SBC
session, the device gains two SUBSCRIBE sessions.
configure voip > sbc settings > sbc-
dialog-subsc-route-mode
[SBCInDialogSubscribeRouteMode]
Enables the device to route in-dialog, refresh SIP SUBSCRIBE
requests to the "working" (has connectivity) proxy.
 [0] = (Default) Disable – the device sends in-dialog, refresh
SUBSCRIBES according to the address in the Contact
header of the 200 OK response received from the proxy to
which the initial SUBSCRIBE was sent (as per the SIP
standard).
 [1] = Enable – the device routes in-dialog, refresh
SUBSCRIBES to the "working" proxy (regardless of the
Contact header). The "working" proxy (address) is
determined by the device's keep-alive mechanism for the
Proxy Set that was used to route the initial SUBSCRIBE.
Note: For this feature to be functional, ensure the following:
 Keep-alive mechanism is enabled for the Proxy Set ('Proxy
Keep-Alive' parameter is set to any value other than
Disable).
 Load-balancing between proxies is disabled ('Proxy Load
Balancing Method' parameter is set to Disable).
configure voip > sbc settings > sbc-
max-fwd-limit
[SBCMaxForwardsLimit]
Defines the Max-Forwards SIP header value. The Max-
Forwards header is used to limit the number of servers (such
as proxies) that can forward the SIP request. The Max-
Forwards value indicates the remaining number of times this
request message is allowed to be forwarded. This count is
decremented by each server that forwards the request.
The parameter affects the Max-Forwards header in the
received message as follows:
 If the received header’s original value is 0, the message is
not passed on and is rejected.
 If the received header’s original value is less than the
parameter's value, the header’s value is decremented
before being sent on.
 If the received header’s original value is greater than the
parameter's value, the header’s value is replaced by the
user-defined parameter’s value.
The valid value range is 1-70. The default is 10.
SBC Session-Expires
configure voip > sbc settings > sbc-
sess-exp-time
[SBCSessionExpires]
Defines the SBC session refresh timer (in seconds) in the
Session-Expires header of outgoing INVITE messages.
The valid value range is 90 (according to RFC 4028) to 86400.
The default is 180.
Minimum Session-Expires
configure voip > sbc settings > min-
Defines the minimum amount of time (in seconds) between
session refresh requests in a dialog before the session is
considered timed out. This value is conveyed in the SIP Min-
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