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Advanced Operational Parameters
A-174 41-001160-00, Release 2.1, Rev 04
IP Phone Administrator Guide
Appendix A
Single Call Restriction
Parameter –
two call support
Two Call Support
(in Web UI)
Aastra Web UI Advanced Settings->Global SIP->RTP Settings
Configuration Files aastra.cfg, <mac>.cfg
Description Enables or disables the single media path restriction between the
57i CT base unit and the handset.
When this feature is enabled (set to 1), you can make separate active
calls from the 57i CT base unit and from the cordless handset. If this
feature is disabled (set to 0), only one call can be active at a time either
from the base unit or from the handset.
When this feature is disabled, and you make an active call on either the
base unit or the handset, any other attempt to make an active call is put
on hold. Also, when this feature is disabled, more than one call can
negotiate complex audio codecs since only a single call is decoding
audio at a time.
Format Boolean
Default Value 1
Range 0 - Disable
1 - Enable
Example two call support: 0