Optimizing Fax Completion Rates - Cisco SPA112 Administration Manual

Configuring Voice
Getting Started with Voice Services
STEP 1
STEP 2
STEP 3
STEP 4
Cisco SPA100 Series Phone Adapters Administration Guide
• Event Logging
You can enable logging and select the relative priority of events to be
logged. The information can be sent to a Syslog Server. For more
information, see
• SIP over TLS
The ATA allows the use of SIP over Transport Layer Security (TLS) SIP over
TLS is designed to eliminate the possibility of malicious activity by
encrypting the SIP messages between the service provider and the end
user. SIP over TLS relies on the widely-deployed and standardized TLS
protocol. SIP over TLS encrypts only the signaling messages and not the
media. A separate secure protocol such as Secure Real-Time Transport
Protocol (SRTP) can be used to encrypt voice packets. SIP over TLS is
configured in the SIP Transport parameter configured on the Voice > Line
1/Line 2 pages. See the SIP Transport settings in
Settings (PHONE1 and PHONE2), page

Optimizing Fax Completion Rates

Issues can occur with fax transmissions over IP networks, even with the T.38
standard, which is supported by the ATA. You can adjust several settings on your
ATA to optimize your fax completion rates.
Ensure that you have enough bandwidth for the uplink and the downlink.
• For G.711 fallback, it is recommend to have approximately 100 kbps.
• For T.38, allocate at least 50 kbps.
Click Voice in the menu bar, and then click Line 1 or Line 2 in the navigation tree.
In the Network Settings section, enter the following settings:
• Network Jitter Level: very high
• Jitter Buffer Adjustment: no
In the Supplementary Service Subscription section, enter the following settings:
• Call Waiting Serv: no
• Three Way Call Serv: no
Voice System Settings, page 56.
Line 1 and Line 2
90.
4
40