T1/E1 Ports
In centralized SIP trunking topologies, this T1/E1 module preserves voice services
in the event of a corporate WAN connectivity failure. In distributed SIP trunking
topologies the module preserves dialout voice services in the event of a local SIP
trunk interface failure.
The RJ48C connector looks very similar to an RJ45 connector found on a typical
CAT5 cable, but they are very different. A RJ48C connector is fastened on to a
STP (Shielded Twisted Pair) cable, not the standard UTP (Unshielded Twisted Pair)
CAT-(1-6) cable. A RJ48C connector also uses a different pin out arrangement,
voltage level, and line capacitance than a RJ45 connector.
Serial Management Port
The serial management port on the Acme Packet 3900 rear panel the provides
console access to the unit over an RS-232C serial connection. The serial management
port is useful for customers who want permanent console access, and provides a layer
of physical security for the unit if access to the site is controlled.
Console port communication is used for administration and maintenance purposes
from a central office (CO) location. Tasks conducted over a console port include:
•
Creating the initial connection to the Acme Packet 3900
•
Accessing and using all functionality available via the ACLI
•
Performing in-lab unit maintenance
Serial Management Port Pin-out
The Acme Packet 3900 console port features one RJ45 port on the unit console.
Because the Acme Packet 3900 does not employ any type of flow control on its
RS-232 ports, only the RX, TX, and GND pins are used. The following table identifies
the pin assignments and signal names/descriptions for the console connector.
Table 2-1 Console Port Pin-Out
Pin Number
Signal Name/Description
3
Receive Data (RX)
4
Ground (GND)
6
Transmit Data (TX)
Console Adapter
A standard RJ45 to DB-9 serial console adapter is shipped with the Acme Packet
3900. This adapter converts the RJ45 plug on a straight-through Ethernet cable to
a standard DB-9 serial port jack, found on a PC or laptop. Any straight-through
Chapter 2
Control Panels
2-4