iPECS eMG80/100& eMG800 & UCP & vUCP
Administration and Programming Manual Issue 2.5
251
Table 4.4.8.1-1 SIP Common Attributes
SIP employs Enblock dialing, where the user dials all digits before
they are sent to the carrier for processing. When the user
completes dialing of a SIP call, ‘#’ is used to indicate the end of
dialing. If users must be able to dial ‘#,’ SIP Pound Use can be
disabled, and the system will automatically send digits at the
expiration of the inter-digit time.
When the system reboots, the button LEDs of SIP phones may
indicate erroneous status. To displays proper status LEDs, the
system sends a Notify message to synchronize the LED states at
the expiration of this timer.
The SRTP path can be established through a VoIP channel
(Packet Relay) or directly between the end-points for SIP
extensions connected to the same LAN as the system.
The system can be configured to query the DNS for the SRV
resource record, which defines domains for various services.
When the system has no resources available for the SIP Request,
the system will respond with this code.
Error Code For
Trunk Rerouting
The call will be rerouted if the iPECS system receives this Error
Code in response to a request—the semi-colon (;) is used to
separate multiple SIP message codes.
When the SIP extension hears a busy tone, the Call Back feature
can be activated by pressing the # key.
System Rule: Follow PGM160- Intercom Busy Service
CallBack: Call Back feature
Incoming SIP trunk will be seized based on this admin setting
System Rule: Follow PGM160 - CO Line Choice.
Round: round-robin rule.
Last: last available trunk
First: first available trunk
For SIP messages, the system can employ Diff-Serv or TOS to
implement QoS.
When Diff-Serv is selected as the QoS method, the DSCP value
for SIP signaling messages is defined.
When TOS is selected as the QoS method, the TOS value for SIP
signaling messages is defined.
When DSCP is selected as the QoS method, the DSCP value for
RTP packets is defined.
When TOS is selected as the QoS method, the TOS value for
RTP packets is defined.
Korea Telecom only, when employing an iPECS system as the
CM, iPECS system will require a Prefix to set up a SIP trunk call.