ATL Telecom IP300S - Manual (Page 64)

IP SIP Phone v2 User’s Guide Mar. 2005
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ii. Otherwise, proceed as normal incoming calls
z Incoming call processing rules (by precedence):
i. Check for the server-side invoked auto-answer feature, if “P-Auto-answer: imperious” is
present, auto-answer it.
ii. If the phone is engaged in do-not-disturb mode, then DND wins
iii. Otherwise, if the phone has turned on unconditionally forward feature, then all incoming
calls are forwarded.
iv. Check for auto-answer feature:
a. Check for server-side auto-answer feature.
b. Check for the global switch for auto-answer feature.
c. Match this call against all enabled service domains for auto-answering feature, if a
match is located, auto-answer it.
v. Otherwise, proceed as normal incoming calls.
10.10. CODEC Preference
The CODECs available on the phone includes G.711A (64kbps), G.711µ (64kbps), G.729A /
G.729AB (8 kbps), G.723.1 / G.723.1A (both 5.3 and 6.4 kbps). The default preference is to
prioritize them based on their compressed voice quality: the higher quality it is, the higher priority
it will be. That is, the default CODEC preference is G.711A, G.711µ, G.729A then G.723.1A (in
that order).
High quality comes in a price: it consumes more precious bandwidth. Take G.711µ for
example, it takes as much as 64 kbps per call, as opposed to 5.3 kbps if G.723.1A is employed.
Thus, if you have limited bandwidth for VoIP, you should consider prioritize those CODECs
come with lower bit-rates such that it will use the most preferred CODEC on making / taking calls.
You could also configure the default voice packetization transmitted to the peer:
z By keypad (TELNET):
a. 【 】 Press FUNC 【 】 + # to activate menu.
b. Go to submenu “8. Advanced” / ”1. CODEC” / “2.Packetization”.
c. Configure the default voice packetization transmitted from your IP SIP Phone to the
peer.
z By web configuration:
a. go to 『IP SIP Phone』/ 『Advanced』 / 『CODEC』