SIP User's Manual 422 Document #: LTRT-65412
MP-11x & MP-124
9.14 Querying Device Channel Resources using SIP
OPTIONS
The device reports its maximum and available channel resources in SIP 200 OK responses
upon receipt of SIP OPTIONS messages. The device sends this information in the SIP X-
Resources header with the following parameters:
telchs: specifies the total telephone channels as well as the number of free (available)
telephone channels
mediachs: not applicable
Below is an example of the X-Resources:
X-Resources: telchs=240/100;mediachs=0/0
In the example above, "telchs" specifies the total telephone channels and the number of
free (available) telephone channels (100 channels are available for use out of a total of 240
channels).
9.15 Working with Supplementary Services
The device supports the following supplementary services:
Call Hold and Retrieve (refer to ''Call Hold and Retrieve'' on page 422)
Call Pickup
(refer to “Call Pickup” on page 425)
Con
sultation (refer to “Consultation Feature” on page 425)
Call Tran
sfer (refer to ''Call Transfer'' on page 426)
Call Fo
rward (refer to ''Call Forward'' on page 426)
Call Waiting - 182 Que
ued Response (refer to “Call Waiting” on page 427)
Messag
e Waiting Indication - MWI (refer to “Message Waiting Indication” on page 428)
Calle
r ID (refer to “Caller ID” on page 428)
Thre
e-way conferencing (refer to ''Three-Way Conferencing'' on page 431)
To a
ctivate these supplementary services on the device, enable each service’s
corresponding parameter using the Web interface or ini file.
Notes:
• All call participants must support the specific supplementary service that
is used.
• When working with certain application servers (such as BroadSoft’s
BroadWorks) in client server mode (the application server controls all
supplementary services and keypad features by itself), the device's
supplementary services must be disabled.
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