Avaya Communication Manager Administrator's Manual page 884

Screen Reference
DMI-BOS
The DMI/BOS protocol is used for high-speed digital communications between a host computer
and Avaya Communication Manager. With this 24-channel protocol, channels 1 to 23 of the
DS1 link carry data and channel 24 carries control signaling. DMI/BOS has greater capacity
than a robbed-bit 24-channel facility. This field appears only when the Signaling Mode field is
common-chan.
Valid entries
y
n
Framing Mode
Use this field to select either superframe (sf or d4) or extended superframe (esf) for T1 service
on the DS1 link. The framing mode you use must match the mode used on the other end of the
link, so work with your network services provider to determine the appropriate entry for this field.
This field only appears if the Bit Rate field is 1.544 (that is, if you're using T-1 service). If you're
using E-1 service, Avaya Communication Manager automatically selects CEPT1 framing.
Tip:
Avaya recommends using ESF when your service provider supports it, especially
Tip:
if you may someday upgrade the facility to ISDN. The ESF format provides
enhanced performance measurements and uses a sophisticated error-checking
method to ensure data integrity.
Valid entries
d4
esf
884 Administrator Guide for Avaya Communication Manager
Usage
Enter y to activate the Digital Multiplexed Interface-Bit
Oriented Signaling (DMI-BOS) format.
Enter n to use an Avaya proprietary format.
Usage
Enter d4 to use the basic DS1 superframe (sf). Avaya
recommends this mode only for voice traffic.
Enter esf to use the Extended Superframe format.
Avaya recommends this mode for digital data traffic. If
you enter esf for a TN464F, TN767E, or a later suffix
DS1 circuit pack, a second page of the DS1 Circuit
Pack screen becomes available to administer ESF Data
Link options.