Specifications

23-10
Cisco Unity Express Voice-Mail and Auto-Attendant CLI Administrator Guide for 3.0 and Later Versions
OL-14010-09
Chapter 23 Configuring Your Cisco IOS Gateway for T.37 On-Ramp and Off-Ramp Fax Support
Fax Feature Benefits and Limitations
3. The e-mail message is sent to the Cisco Unity Express module over a SMTP connection (shown in
Figure 23-4 as step 7).
4. The fax is stored in the subscriber’s mailbox.
Fax Feature Benefits and Limitations
The main benefits and limitations of the fax feature are:
• Faxes can be composed and sent from the analog fax machine only. There is no other support that is
offered on Cisco Unity Express to compose a fax.
• Broadcast faxes are not supported.
• Faxes sent to the GDM with a phone extension are supported. However, GDM access from the IMAP
is not supported.
• Faxes can be printed using the fax number configured at the system level. This number is played
when a user tries to print the fax using the TUI or VVE. Users can override this number with the fax
number of their choice. This option allows subscribers to print the faxes to the fax machine of their
choice.
• Faxes can be forwarded in the Cisco Unity Express network. A subscriber can record annotations
before forwarding a fax. When forwarding the fax, the sender can mark it as private, urgent, or both.
When a subscriber listens to forwarded message, the annotations are played the same way as a voice
message.
• Replying to an original received fax using the fax gateway is not supported. After the message is
forwarded in the Cisco Unity Express network, the reply feature works the same way as for other
voice messages.
• Live Reply to faxes is not supported
• Faxes are sent to a Cisco Unity Express or Cisco Unity system on the network using VPIM2.
• Faxes can be deleted and undeleted like regular voice messages.
• The delivery status notification is processed for outgoing faxes. When a delay or failure notification
occurs, DDR or NDR is generated for the subscriber.
• For incoming messages, the embedded SMTP server handles any error conditions. After the message
is accepted, it is assumed that the message is successfully processed.
• The fax is stored internally as BASE64 encoded. The size of the fax taken for the calculations in the
system is the BASE64 encoded size. The mailbox usage and related information is displayed in units
of time. The fax size is converted from bytes to seconds based on G711 algorithm (assuming sample
rate of 64 KBps). The fax size, in seconds, used in the system is calculated by multiplying the length
of the message by 8000 seconds, where the length of the message is in bytes.
• The total number of fax sessions is counted against the total TUI sessions allowed in the system. The
number of maximum fax sessions (calls) in the system is the same as the maximum limit of TUI
sessions.
• You can use the message notification feature with faxes in the same way as voice messages. Faxes
are sent as TIFF attachment in the notification e-mail.
• Fax can be marked for future delivery while forwarding a fax.
• Faxes are accessible from the supported IMAP supported clients. The actual fax
is attached to the e-mail message as a TIFF file. The name of the TIFF file has the format
FM_yyyy.mm.dd_hh.mm.ss.tif, where hh is in 24-hour format. The IMAP clients let subscribers